Loading...
1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3#
4# (c) 2001, Dave Jones. (the file handling bit)
5# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
6# (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
7# (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
8# (c) 2010-2018 Joe Perches <joe@perches.com>
9
10use strict;
11use warnings;
12use POSIX;
13use File::Basename;
14use Cwd 'abs_path';
15use Term::ANSIColor qw(:constants);
16use Encode qw(decode encode);
17
18my $P = $0;
19my $D = dirname(abs_path($P));
20
21my $V = '0.32';
22
23use Getopt::Long qw(:config no_auto_abbrev);
24
25my $quiet = 0;
26my $tree = 1;
27my $chk_signoff = 1;
28my $chk_patch = 1;
29my $tst_only;
30my $emacs = 0;
31my $terse = 0;
32my $showfile = 0;
33my $file = 0;
34my $git = 0;
35my %git_commits = ();
36my $check = 0;
37my $check_orig = 0;
38my $summary = 1;
39my $mailback = 0;
40my $summary_file = 0;
41my $show_types = 0;
42my $list_types = 0;
43my $fix = 0;
44my $fix_inplace = 0;
45my $root;
46my %debug;
47my %camelcase = ();
48my %use_type = ();
49my @use = ();
50my %ignore_type = ();
51my @ignore = ();
52my $help = 0;
53my $configuration_file = ".checkpatch.conf";
54my $max_line_length = 100;
55my $ignore_perl_version = 0;
56my $minimum_perl_version = 5.10.0;
57my $min_conf_desc_length = 4;
58my $spelling_file = "$D/spelling.txt";
59my $codespell = 0;
60my $codespellfile = "/usr/share/codespell/dictionary.txt";
61my $conststructsfile = "$D/const_structs.checkpatch";
62my $typedefsfile;
63my $color = "auto";
64my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
65# git output parsing needs US English output, so first set backtick child process LANGUAGE
66my $git_command ='export LANGUAGE=en_US.UTF-8; git';
67my $tabsize = 8;
68
69sub help {
70 my ($exitcode) = @_;
71
72 print << "EOM";
73Usage: $P [OPTION]... [FILE]...
74Version: $V
75
76Options:
77 -q, --quiet quiet
78 --no-tree run without a kernel tree
79 --no-signoff do not check for 'Signed-off-by' line
80 --patch treat FILE as patchfile (default)
81 --emacs emacs compile window format
82 --terse one line per report
83 --showfile emit diffed file position, not input file position
84 -g, --git treat FILE as a single commit or git revision range
85 single git commit with:
86 <rev>
87 <rev>^
88 <rev>~n
89 multiple git commits with:
90 <rev1>..<rev2>
91 <rev1>...<rev2>
92 <rev>-<count>
93 git merges are ignored
94 -f, --file treat FILE as regular source file
95 --subjective, --strict enable more subjective tests
96 --list-types list the possible message types
97 --types TYPE(,TYPE2...) show only these comma separated message types
98 --ignore TYPE(,TYPE2...) ignore various comma separated message types
99 --show-types show the specific message type in the output
100 --max-line-length=n set the maximum line length, (default $max_line_length)
101 if exceeded, warn on patches
102 requires --strict for use with --file
103 --min-conf-desc-length=n set the min description length, if shorter, warn
104 --tab-size=n set the number of spaces for tab (default $tabsize)
105 --root=PATH PATH to the kernel tree root
106 --no-summary suppress the per-file summary
107 --mailback only produce a report in case of warnings/errors
108 --summary-file include the filename in summary
109 --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
110 'values', 'possible', 'type', and 'attr' (default
111 is all off)
112 --test-only=WORD report only warnings/errors containing WORD
113 literally
114 --fix EXPERIMENTAL - may create horrible results
115 If correctable single-line errors exist, create
116 "<inputfile>.EXPERIMENTAL-checkpatch-fixes"
117 with potential errors corrected to the preferred
118 checkpatch style
119 --fix-inplace EXPERIMENTAL - may create horrible results
120 Is the same as --fix, but overwrites the input
121 file. It's your fault if there's no backup or git
122 --ignore-perl-version override checking of perl version. expect
123 runtime errors.
124 --codespell Use the codespell dictionary for spelling/typos
125 (default:/usr/share/codespell/dictionary.txt)
126 --codespellfile Use this codespell dictionary
127 --typedefsfile Read additional types from this file
128 --color[=WHEN] Use colors 'always', 'never', or only when output
129 is a terminal ('auto'). Default is 'auto'.
130 -h, --help, --version display this help and exit
131
132When FILE is - read standard input.
133EOM
134
135 exit($exitcode);
136}
137
138sub uniq {
139 my %seen;
140 return grep { !$seen{$_}++ } @_;
141}
142
143sub list_types {
144 my ($exitcode) = @_;
145
146 my $count = 0;
147
148 local $/ = undef;
149
150 open(my $script, '<', abs_path($P)) or
151 die "$P: Can't read '$P' $!\n";
152
153 my $text = <$script>;
154 close($script);
155
156 my @types = ();
157 # Also catch when type or level is passed through a variable
158 for ($text =~ /(?:(?:\bCHK|\bWARN|\bERROR|&\{\$msg_level})\s*\(|\$msg_type\s*=)\s*"([^"]+)"/g) {
159 push (@types, $_);
160 }
161 @types = sort(uniq(@types));
162 print("#\tMessage type\n\n");
163 foreach my $type (@types) {
164 print(++$count . "\t" . $type . "\n");
165 }
166
167 exit($exitcode);
168}
169
170my $conf = which_conf($configuration_file);
171if (-f $conf) {
172 my @conf_args;
173 open(my $conffile, '<', "$conf")
174 or warn "$P: Can't find a readable $configuration_file file $!\n";
175
176 while (<$conffile>) {
177 my $line = $_;
178
179 $line =~ s/\s*\n?$//g;
180 $line =~ s/^\s*//g;
181 $line =~ s/\s+/ /g;
182
183 next if ($line =~ m/^\s*#/);
184 next if ($line =~ m/^\s*$/);
185
186 my @words = split(" ", $line);
187 foreach my $word (@words) {
188 last if ($word =~ m/^#/);
189 push (@conf_args, $word);
190 }
191 }
192 close($conffile);
193 unshift(@ARGV, @conf_args) if @conf_args;
194}
195
196# Perl's Getopt::Long allows options to take optional arguments after a space.
197# Prevent --color by itself from consuming other arguments
198foreach (@ARGV) {
199 if ($_ eq "--color" || $_ eq "-color") {
200 $_ = "--color=$color";
201 }
202}
203
204GetOptions(
205 'q|quiet+' => \$quiet,
206 'tree!' => \$tree,
207 'signoff!' => \$chk_signoff,
208 'patch!' => \$chk_patch,
209 'emacs!' => \$emacs,
210 'terse!' => \$terse,
211 'showfile!' => \$showfile,
212 'f|file!' => \$file,
213 'g|git!' => \$git,
214 'subjective!' => \$check,
215 'strict!' => \$check,
216 'ignore=s' => \@ignore,
217 'types=s' => \@use,
218 'show-types!' => \$show_types,
219 'list-types!' => \$list_types,
220 'max-line-length=i' => \$max_line_length,
221 'min-conf-desc-length=i' => \$min_conf_desc_length,
222 'tab-size=i' => \$tabsize,
223 'root=s' => \$root,
224 'summary!' => \$summary,
225 'mailback!' => \$mailback,
226 'summary-file!' => \$summary_file,
227 'fix!' => \$fix,
228 'fix-inplace!' => \$fix_inplace,
229 'ignore-perl-version!' => \$ignore_perl_version,
230 'debug=s' => \%debug,
231 'test-only=s' => \$tst_only,
232 'codespell!' => \$codespell,
233 'codespellfile=s' => \$codespellfile,
234 'typedefsfile=s' => \$typedefsfile,
235 'color=s' => \$color,
236 'no-color' => \$color, #keep old behaviors of -nocolor
237 'nocolor' => \$color, #keep old behaviors of -nocolor
238 'h|help' => \$help,
239 'version' => \$help
240) or help(1);
241
242help(0) if ($help);
243
244list_types(0) if ($list_types);
245
246$fix = 1 if ($fix_inplace);
247$check_orig = $check;
248
249die "$P: --git cannot be used with --file or --fix\n" if ($git && ($file || $fix));
250
251my $exit = 0;
252
253my $perl_version_ok = 1;
254if ($^V && $^V lt $minimum_perl_version) {
255 $perl_version_ok = 0;
256 printf "$P: requires at least perl version %vd\n", $minimum_perl_version;
257 exit(1) if (!$ignore_perl_version);
258}
259
260#if no filenames are given, push '-' to read patch from stdin
261if ($#ARGV < 0) {
262 push(@ARGV, '-');
263}
264
265if ($color =~ /^[01]$/) {
266 $color = !$color;
267} elsif ($color =~ /^always$/i) {
268 $color = 1;
269} elsif ($color =~ /^never$/i) {
270 $color = 0;
271} elsif ($color =~ /^auto$/i) {
272 $color = (-t STDOUT);
273} else {
274 die "$P: Invalid color mode: $color\n";
275}
276
277# skip TAB size 1 to avoid additional checks on $tabsize - 1
278die "$P: Invalid TAB size: $tabsize\n" if ($tabsize < 2);
279
280sub hash_save_array_words {
281 my ($hashRef, $arrayRef) = @_;
282
283 my @array = split(/,/, join(',', @$arrayRef));
284 foreach my $word (@array) {
285 $word =~ s/\s*\n?$//g;
286 $word =~ s/^\s*//g;
287 $word =~ s/\s+/ /g;
288 $word =~ tr/[a-z]/[A-Z]/;
289
290 next if ($word =~ m/^\s*#/);
291 next if ($word =~ m/^\s*$/);
292
293 $hashRef->{$word}++;
294 }
295}
296
297sub hash_show_words {
298 my ($hashRef, $prefix) = @_;
299
300 if (keys %$hashRef) {
301 print "\nNOTE: $prefix message types:";
302 foreach my $word (sort keys %$hashRef) {
303 print " $word";
304 }
305 print "\n";
306 }
307}
308
309hash_save_array_words(\%ignore_type, \@ignore);
310hash_save_array_words(\%use_type, \@use);
311
312my $dbg_values = 0;
313my $dbg_possible = 0;
314my $dbg_type = 0;
315my $dbg_attr = 0;
316for my $key (keys %debug) {
317 ## no critic
318 eval "\${dbg_$key} = '$debug{$key}';";
319 die "$@" if ($@);
320}
321
322my $rpt_cleaners = 0;
323
324if ($terse) {
325 $emacs = 1;
326 $quiet++;
327}
328
329if ($tree) {
330 if (defined $root) {
331 if (!top_of_kernel_tree($root)) {
332 die "$P: $root: --root does not point at a valid tree\n";
333 }
334 } else {
335 if (top_of_kernel_tree('.')) {
336 $root = '.';
337 } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
338 top_of_kernel_tree($1)) {
339 $root = $1;
340 }
341 }
342
343 if (!defined $root) {
344 print "Must be run from the top-level dir. of a kernel tree\n";
345 exit(2);
346 }
347}
348
349my $emitted_corrupt = 0;
350
351our $Ident = qr{
352 [A-Za-z_][A-Za-z\d_]*
353 (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
354 }x;
355our $Storage = qr{extern|static|asmlinkage};
356our $Sparse = qr{
357 __user|
358 __kernel|
359 __force|
360 __iomem|
361 __must_check|
362 __kprobes|
363 __ref|
364 __refconst|
365 __refdata|
366 __rcu|
367 __private
368 }x;
369our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
370our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
371our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
372our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
373our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};
374
375# Notes to $Attribute:
376# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
377our $Attribute = qr{
378 const|
379 __percpu|
380 __nocast|
381 __safe|
382 __bitwise|
383 __packed__|
384 __packed2__|
385 __naked|
386 __maybe_unused|
387 __always_unused|
388 __noreturn|
389 __used|
390 __cold|
391 __pure|
392 __noclone|
393 __deprecated|
394 __read_mostly|
395 __ro_after_init|
396 __kprobes|
397 $InitAttribute|
398 ____cacheline_aligned|
399 ____cacheline_aligned_in_smp|
400 ____cacheline_internodealigned_in_smp|
401 __weak
402 }x;
403our $Modifier;
404our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__};
405our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
406our $Lval = qr{$Ident(?:$Member)*};
407
408our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u};
409our $Binary = qr{(?i)0b[01]+$Int_type?};
410our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
411our $Int = qr{[0-9]+$Int_type?};
412our $Octal = qr{0[0-7]+$Int_type?};
413our $String = qr{"[X\t]*"};
414our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
415our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
416our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
417our $Float = qr{$Float_hex|$Float_dec|$Float_int};
418our $Constant = qr{$Float|$Binary|$Octal|$Hex|$Int};
419our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
420our $Compare = qr{<=|>=|==|!=|<|(?<!-)>};
421our $Arithmetic = qr{\+|-|\*|\/|%};
422our $Operators = qr{
423 <=|>=|==|!=|
424 =>|->|<<|>>|<|>|!|~|
425 &&|\|\||,|\^|\+\+|--|&|\||$Arithmetic
426 }x;
427
428our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x;
429
430our $BasicType;
431our $NonptrType;
432our $NonptrTypeMisordered;
433our $NonptrTypeWithAttr;
434our $Type;
435our $TypeMisordered;
436our $Declare;
437our $DeclareMisordered;
438
439our $NON_ASCII_UTF8 = qr{
440 [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
441 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
442 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
443 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
444 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
445 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
446 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
447}x;
448
449our $UTF8 = qr{
450 [\x09\x0A\x0D\x20-\x7E] # ASCII
451 | $NON_ASCII_UTF8
452}x;
453
454our $typeC99Typedefs = qr{(?:__)?(?:[us]_?)?int_?(?:8|16|32|64)_t};
455our $typeOtherOSTypedefs = qr{(?x:
456 u_(?:char|short|int|long) | # bsd
457 u(?:nchar|short|int|long) # sysv
458)};
459our $typeKernelTypedefs = qr{(?x:
460 (?:__)?(?:u|s|be|le)(?:8|16|32|64)|
461 atomic_t
462)};
463our $typeTypedefs = qr{(?x:
464 $typeC99Typedefs\b|
465 $typeOtherOSTypedefs\b|
466 $typeKernelTypedefs\b
467)};
468
469our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
470
471our $logFunctions = qr{(?x:
472 printk(?:_ratelimited|_once|_deferred_once|_deferred|)|
473 (?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
474 TP_printk|
475 WARN(?:_RATELIMIT|_ONCE|)|
476 panic|
477 MODULE_[A-Z_]+|
478 seq_vprintf|seq_printf|seq_puts
479)};
480
481our $allocFunctions = qr{(?x:
482 (?:(?:devm_)?
483 (?:kv|k|v)[czm]alloc(?:_node|_array)? |
484 kstrdup(?:_const)? |
485 kmemdup(?:_nul)?) |
486 (?:\w+)?alloc_skb(?:_ip_align)? |
487 # dev_alloc_skb/netdev_alloc_skb, et al
488 dma_alloc_coherent
489)};
490
491our $signature_tags = qr{(?xi:
492 Signed-off-by:|
493 Co-developed-by:|
494 Acked-by:|
495 Tested-by:|
496 Reviewed-by:|
497 Reported-by:|
498 Suggested-by:|
499 To:|
500 Cc:
501)};
502
503our @typeListMisordered = (
504 qr{char\s+(?:un)?signed},
505 qr{int\s+(?:(?:un)?signed\s+)?short\s},
506 qr{int\s+short(?:\s+(?:un)?signed)},
507 qr{short\s+int(?:\s+(?:un)?signed)},
508 qr{(?:un)?signed\s+int\s+short},
509 qr{short\s+(?:un)?signed},
510 qr{long\s+int\s+(?:un)?signed},
511 qr{int\s+long\s+(?:un)?signed},
512 qr{long\s+(?:un)?signed\s+int},
513 qr{int\s+(?:un)?signed\s+long},
514 qr{int\s+(?:un)?signed},
515 qr{int\s+long\s+long\s+(?:un)?signed},
516 qr{long\s+long\s+int\s+(?:un)?signed},
517 qr{long\s+long\s+(?:un)?signed\s+int},
518 qr{long\s+long\s+(?:un)?signed},
519 qr{long\s+(?:un)?signed},
520);
521
522our @typeList = (
523 qr{void},
524 qr{(?:(?:un)?signed\s+)?char},
525 qr{(?:(?:un)?signed\s+)?short\s+int},
526 qr{(?:(?:un)?signed\s+)?short},
527 qr{(?:(?:un)?signed\s+)?int},
528 qr{(?:(?:un)?signed\s+)?long\s+int},
529 qr{(?:(?:un)?signed\s+)?long\s+long\s+int},
530 qr{(?:(?:un)?signed\s+)?long\s+long},
531 qr{(?:(?:un)?signed\s+)?long},
532 qr{(?:un)?signed},
533 qr{float},
534 qr{double},
535 qr{bool},
536 qr{struct\s+$Ident},
537 qr{union\s+$Ident},
538 qr{enum\s+$Ident},
539 qr{${Ident}_t},
540 qr{${Ident}_handler},
541 qr{${Ident}_handler_fn},
542 @typeListMisordered,
543);
544
545our $C90_int_types = qr{(?x:
546 long\s+long\s+int\s+(?:un)?signed|
547 long\s+long\s+(?:un)?signed\s+int|
548 long\s+long\s+(?:un)?signed|
549 (?:(?:un)?signed\s+)?long\s+long\s+int|
550 (?:(?:un)?signed\s+)?long\s+long|
551 int\s+long\s+long\s+(?:un)?signed|
552 int\s+(?:(?:un)?signed\s+)?long\s+long|
553
554 long\s+int\s+(?:un)?signed|
555 long\s+(?:un)?signed\s+int|
556 long\s+(?:un)?signed|
557 (?:(?:un)?signed\s+)?long\s+int|
558 (?:(?:un)?signed\s+)?long|
559 int\s+long\s+(?:un)?signed|
560 int\s+(?:(?:un)?signed\s+)?long|
561
562 int\s+(?:un)?signed|
563 (?:(?:un)?signed\s+)?int
564)};
565
566our @typeListFile = ();
567our @typeListWithAttr = (
568 @typeList,
569 qr{struct\s+$InitAttribute\s+$Ident},
570 qr{union\s+$InitAttribute\s+$Ident},
571);
572
573our @modifierList = (
574 qr{fastcall},
575);
576our @modifierListFile = ();
577
578our @mode_permission_funcs = (
579 ["module_param", 3],
580 ["module_param_(?:array|named|string)", 4],
581 ["module_param_array_named", 5],
582 ["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
583 ["proc_create(?:_data|)", 2],
584 ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2],
585 ["IIO_DEV_ATTR_[A-Z_]+", 1],
586 ["SENSOR_(?:DEVICE_|)ATTR_2", 2],
587 ["SENSOR_TEMPLATE(?:_2|)", 3],
588 ["__ATTR", 2],
589);
590
591my $word_pattern = '\b[A-Z]?[a-z]{2,}\b';
592
593#Create a search pattern for all these functions to speed up a loop below
594our $mode_perms_search = "";
595foreach my $entry (@mode_permission_funcs) {
596 $mode_perms_search .= '|' if ($mode_perms_search ne "");
597 $mode_perms_search .= $entry->[0];
598}
599$mode_perms_search = "(?:${mode_perms_search})";
600
601our %deprecated_apis = (
602 "synchronize_rcu_bh" => "synchronize_rcu",
603 "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited",
604 "call_rcu_bh" => "call_rcu",
605 "rcu_barrier_bh" => "rcu_barrier",
606 "synchronize_sched" => "synchronize_rcu",
607 "synchronize_sched_expedited" => "synchronize_rcu_expedited",
608 "call_rcu_sched" => "call_rcu",
609 "rcu_barrier_sched" => "rcu_barrier",
610 "get_state_synchronize_sched" => "get_state_synchronize_rcu",
611 "cond_synchronize_sched" => "cond_synchronize_rcu",
612);
613
614#Create a search pattern for all these strings to speed up a loop below
615our $deprecated_apis_search = "";
616foreach my $entry (keys %deprecated_apis) {
617 $deprecated_apis_search .= '|' if ($deprecated_apis_search ne "");
618 $deprecated_apis_search .= $entry;
619}
620$deprecated_apis_search = "(?:${deprecated_apis_search})";
621
622our $mode_perms_world_writable = qr{
623 S_IWUGO |
624 S_IWOTH |
625 S_IRWXUGO |
626 S_IALLUGO |
627 0[0-7][0-7][2367]
628}x;
629
630our %mode_permission_string_types = (
631 "S_IRWXU" => 0700,
632 "S_IRUSR" => 0400,
633 "S_IWUSR" => 0200,
634 "S_IXUSR" => 0100,
635 "S_IRWXG" => 0070,
636 "S_IRGRP" => 0040,
637 "S_IWGRP" => 0020,
638 "S_IXGRP" => 0010,
639 "S_IRWXO" => 0007,
640 "S_IROTH" => 0004,
641 "S_IWOTH" => 0002,
642 "S_IXOTH" => 0001,
643 "S_IRWXUGO" => 0777,
644 "S_IRUGO" => 0444,
645 "S_IWUGO" => 0222,
646 "S_IXUGO" => 0111,
647);
648
649#Create a search pattern for all these strings to speed up a loop below
650our $mode_perms_string_search = "";
651foreach my $entry (keys %mode_permission_string_types) {
652 $mode_perms_string_search .= '|' if ($mode_perms_string_search ne "");
653 $mode_perms_string_search .= $entry;
654}
655our $single_mode_perms_string_search = "(?:${mode_perms_string_search})";
656our $multi_mode_perms_string_search = qr{
657 ${single_mode_perms_string_search}
658 (?:\s*\|\s*${single_mode_perms_string_search})*
659}x;
660
661sub perms_to_octal {
662 my ($string) = @_;
663
664 return trim($string) if ($string =~ /^\s*0[0-7]{3,3}\s*$/);
665
666 my $val = "";
667 my $oval = "";
668 my $to = 0;
669 my $curpos = 0;
670 my $lastpos = 0;
671 while ($string =~ /\b(($single_mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
672 $curpos = pos($string);
673 my $match = $2;
674 my $omatch = $1;
675 last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
676 $lastpos = $curpos;
677 $to |= $mode_permission_string_types{$match};
678 $val .= '\s*\|\s*' if ($val ne "");
679 $val .= $match;
680 $oval .= $omatch;
681 }
682 $oval =~ s/^\s*\|\s*//;
683 $oval =~ s/\s*\|\s*$//;
684 return sprintf("%04o", $to);
685}
686
687our $allowed_asm_includes = qr{(?x:
688 irq|
689 memory|
690 time|
691 reboot
692)};
693# memory.h: ARM has a custom one
694
695# Load common spelling mistakes and build regular expression list.
696my $misspellings;
697my %spelling_fix;
698
699if (open(my $spelling, '<', $spelling_file)) {
700 while (<$spelling>) {
701 my $line = $_;
702
703 $line =~ s/\s*\n?$//g;
704 $line =~ s/^\s*//g;
705
706 next if ($line =~ m/^\s*#/);
707 next if ($line =~ m/^\s*$/);
708
709 my ($suspect, $fix) = split(/\|\|/, $line);
710
711 $spelling_fix{$suspect} = $fix;
712 }
713 close($spelling);
714} else {
715 warn "No typos will be found - file '$spelling_file': $!\n";
716}
717
718if ($codespell) {
719 if (open(my $spelling, '<', $codespellfile)) {
720 while (<$spelling>) {
721 my $line = $_;
722
723 $line =~ s/\s*\n?$//g;
724 $line =~ s/^\s*//g;
725
726 next if ($line =~ m/^\s*#/);
727 next if ($line =~ m/^\s*$/);
728 next if ($line =~ m/, disabled/i);
729
730 $line =~ s/,.*$//;
731
732 my ($suspect, $fix) = split(/->/, $line);
733
734 $spelling_fix{$suspect} = $fix;
735 }
736 close($spelling);
737 } else {
738 warn "No codespell typos will be found - file '$codespellfile': $!\n";
739 }
740}
741
742$misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix;
743
744sub read_words {
745 my ($wordsRef, $file) = @_;
746
747 if (open(my $words, '<', $file)) {
748 while (<$words>) {
749 my $line = $_;
750
751 $line =~ s/\s*\n?$//g;
752 $line =~ s/^\s*//g;
753
754 next if ($line =~ m/^\s*#/);
755 next if ($line =~ m/^\s*$/);
756 if ($line =~ /\s/) {
757 print("$file: '$line' invalid - ignored\n");
758 next;
759 }
760
761 $$wordsRef .= '|' if (defined $$wordsRef);
762 $$wordsRef .= $line;
763 }
764 close($file);
765 return 1;
766 }
767
768 return 0;
769}
770
771my $const_structs;
772if (show_type("CONST_STRUCT")) {
773 read_words(\$const_structs, $conststructsfile)
774 or warn "No structs that should be const will be found - file '$conststructsfile': $!\n";
775}
776
777if (defined($typedefsfile)) {
778 my $typeOtherTypedefs;
779 read_words(\$typeOtherTypedefs, $typedefsfile)
780 or warn "No additional types will be considered - file '$typedefsfile': $!\n";
781 $typeTypedefs .= '|' . $typeOtherTypedefs if (defined $typeOtherTypedefs);
782}
783
784sub build_types {
785 my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)";
786 my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)";
787 my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)";
788 my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)";
789 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
790 $BasicType = qr{
791 (?:$typeTypedefs\b)|
792 (?:${all}\b)
793 }x;
794 $NonptrType = qr{
795 (?:$Modifier\s+|const\s+)*
796 (?:
797 (?:typeof|__typeof__)\s*\([^\)]*\)|
798 (?:$typeTypedefs\b)|
799 (?:${all}\b)
800 )
801 (?:\s+$Modifier|\s+const)*
802 }x;
803 $NonptrTypeMisordered = qr{
804 (?:$Modifier\s+|const\s+)*
805 (?:
806 (?:${Misordered}\b)
807 )
808 (?:\s+$Modifier|\s+const)*
809 }x;
810 $NonptrTypeWithAttr = qr{
811 (?:$Modifier\s+|const\s+)*
812 (?:
813 (?:typeof|__typeof__)\s*\([^\)]*\)|
814 (?:$typeTypedefs\b)|
815 (?:${allWithAttr}\b)
816 )
817 (?:\s+$Modifier|\s+const)*
818 }x;
819 $Type = qr{
820 $NonptrType
821 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
822 (?:\s+$Inline|\s+$Modifier)*
823 }x;
824 $TypeMisordered = qr{
825 $NonptrTypeMisordered
826 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
827 (?:\s+$Inline|\s+$Modifier)*
828 }x;
829 $Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type};
830 $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered};
831}
832build_types();
833
834our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
835
836# Using $balanced_parens, $LvalOrFunc, or $FuncArg
837# requires at least perl version v5.10.0
838# Any use must be runtime checked with $^V
839
840our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
841our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*};
842our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)};
843
844our $declaration_macros = qr{(?x:
845 (?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,6}\s*\(|
846 (?:$Storage\s+)?[HLP]?LIST_HEAD\s*\(|
847 (?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\(
848)};
849
850sub deparenthesize {
851 my ($string) = @_;
852 return "" if (!defined($string));
853
854 while ($string =~ /^\s*\(.*\)\s*$/) {
855 $string =~ s@^\s*\(\s*@@;
856 $string =~ s@\s*\)\s*$@@;
857 }
858
859 $string =~ s@\s+@ @g;
860
861 return $string;
862}
863
864sub seed_camelcase_file {
865 my ($file) = @_;
866
867 return if (!(-f $file));
868
869 local $/;
870
871 open(my $include_file, '<', "$file")
872 or warn "$P: Can't read '$file' $!\n";
873 my $text = <$include_file>;
874 close($include_file);
875
876 my @lines = split('\n', $text);
877
878 foreach my $line (@lines) {
879 next if ($line !~ /(?:[A-Z][a-z]|[a-z][A-Z])/);
880 if ($line =~ /^[ \t]*(?:#[ \t]*define|typedef\s+$Type)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)/) {
881 $camelcase{$1} = 1;
882 } elsif ($line =~ /^\s*$Declare\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[\(\[,;]/) {
883 $camelcase{$1} = 1;
884 } elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[;\{]/) {
885 $camelcase{$1} = 1;
886 }
887 }
888}
889
890our %maintained_status = ();
891
892sub is_maintained_obsolete {
893 my ($filename) = @_;
894
895 return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl"));
896
897 if (!exists($maintained_status{$filename})) {
898 $maintained_status{$filename} = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
899 }
900
901 return $maintained_status{$filename} =~ /obsolete/i;
902}
903
904sub is_SPDX_License_valid {
905 my ($license) = @_;
906
907 return 1 if (!$tree || which("python") eq "" || !(-e "$root/scripts/spdxcheck.py") || !(-e "$root/.git"));
908
909 my $root_path = abs_path($root);
910 my $status = `cd "$root_path"; echo "$license" | python scripts/spdxcheck.py -`;
911 return 0 if ($status ne "");
912 return 1;
913}
914
915my $camelcase_seeded = 0;
916sub seed_camelcase_includes {
917 return if ($camelcase_seeded);
918
919 my $files;
920 my $camelcase_cache = "";
921 my @include_files = ();
922
923 $camelcase_seeded = 1;
924
925 if (-e ".git") {
926 my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`;
927 chomp $git_last_include_commit;
928 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
929 } else {
930 my $last_mod_date = 0;
931 $files = `find $root/include -name "*.h"`;
932 @include_files = split('\n', $files);
933 foreach my $file (@include_files) {
934 my $date = POSIX::strftime("%Y%m%d%H%M",
935 localtime((stat $file)[9]));
936 $last_mod_date = $date if ($last_mod_date < $date);
937 }
938 $camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date";
939 }
940
941 if ($camelcase_cache ne "" && -f $camelcase_cache) {
942 open(my $camelcase_file, '<', "$camelcase_cache")
943 or warn "$P: Can't read '$camelcase_cache' $!\n";
944 while (<$camelcase_file>) {
945 chomp;
946 $camelcase{$_} = 1;
947 }
948 close($camelcase_file);
949
950 return;
951 }
952
953 if (-e ".git") {
954 $files = `${git_command} ls-files "include/*.h"`;
955 @include_files = split('\n', $files);
956 }
957
958 foreach my $file (@include_files) {
959 seed_camelcase_file($file);
960 }
961
962 if ($camelcase_cache ne "") {
963 unlink glob ".checkpatch-camelcase.*";
964 open(my $camelcase_file, '>', "$camelcase_cache")
965 or warn "$P: Can't write '$camelcase_cache' $!\n";
966 foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
967 print $camelcase_file ("$_\n");
968 }
969 close($camelcase_file);
970 }
971}
972
973sub git_commit_info {
974 my ($commit, $id, $desc) = @_;
975
976 return ($id, $desc) if ((which("git") eq "") || !(-e ".git"));
977
978 my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`;
979 $output =~ s/^\s*//gm;
980 my @lines = split("\n", $output);
981
982 return ($id, $desc) if ($#lines < 0);
983
984 if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) {
985# Maybe one day convert this block of bash into something that returns
986# all matching commit ids, but it's very slow...
987#
988# echo "checking commits $1..."
989# git rev-list --remotes | grep -i "^$1" |
990# while read line ; do
991# git log --format='%H %s' -1 $line |
992# echo "commit $(cut -c 1-12,41-)"
993# done
994 } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./) {
995 $id = undef;
996 } else {
997 $id = substr($lines[0], 0, 12);
998 $desc = substr($lines[0], 41);
999 }
1000
1001 return ($id, $desc);
1002}
1003
1004$chk_signoff = 0 if ($file);
1005
1006my @rawlines = ();
1007my @lines = ();
1008my @fixed = ();
1009my @fixed_inserted = ();
1010my @fixed_deleted = ();
1011my $fixlinenr = -1;
1012
1013# If input is git commits, extract all commits from the commit expressions.
1014# For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'.
1015die "$P: No git repository found\n" if ($git && !-e ".git");
1016
1017if ($git) {
1018 my @commits = ();
1019 foreach my $commit_expr (@ARGV) {
1020 my $git_range;
1021 if ($commit_expr =~ m/^(.*)-(\d+)$/) {
1022 $git_range = "-$2 $1";
1023 } elsif ($commit_expr =~ m/\.\./) {
1024 $git_range = "$commit_expr";
1025 } else {
1026 $git_range = "-1 $commit_expr";
1027 }
1028 my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
1029 foreach my $line (split(/\n/, $lines)) {
1030 $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
1031 next if (!defined($1) || !defined($2));
1032 my $sha1 = $1;
1033 my $subject = $2;
1034 unshift(@commits, $sha1);
1035 $git_commits{$sha1} = $subject;
1036 }
1037 }
1038 die "$P: no git commits after extraction!\n" if (@commits == 0);
1039 @ARGV = @commits;
1040}
1041
1042my $vname;
1043$allow_c99_comments = !defined $ignore_type{"C99_COMMENT_TOLERANCE"};
1044for my $filename (@ARGV) {
1045 my $FILE;
1046 if ($git) {
1047 open($FILE, '-|', "git format-patch -M --stdout -1 $filename") ||
1048 die "$P: $filename: git format-patch failed - $!\n";
1049 } elsif ($file) {
1050 open($FILE, '-|', "diff -u /dev/null $filename") ||
1051 die "$P: $filename: diff failed - $!\n";
1052 } elsif ($filename eq '-') {
1053 open($FILE, '<&STDIN');
1054 } else {
1055 open($FILE, '<', "$filename") ||
1056 die "$P: $filename: open failed - $!\n";
1057 }
1058 if ($filename eq '-') {
1059 $vname = 'Your patch';
1060 } elsif ($git) {
1061 $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")';
1062 } else {
1063 $vname = $filename;
1064 }
1065 while (<$FILE>) {
1066 chomp;
1067 push(@rawlines, $_);
1068 $vname = qq("$1") if ($filename eq '-' && $_ =~ m/^Subject:\s+(.+)/i);
1069 }
1070 close($FILE);
1071
1072 if ($#ARGV > 0 && $quiet == 0) {
1073 print '-' x length($vname) . "\n";
1074 print "$vname\n";
1075 print '-' x length($vname) . "\n";
1076 }
1077
1078 if (!process($filename)) {
1079 $exit = 1;
1080 }
1081 @rawlines = ();
1082 @lines = ();
1083 @fixed = ();
1084 @fixed_inserted = ();
1085 @fixed_deleted = ();
1086 $fixlinenr = -1;
1087 @modifierListFile = ();
1088 @typeListFile = ();
1089 build_types();
1090}
1091
1092if (!$quiet) {
1093 hash_show_words(\%use_type, "Used");
1094 hash_show_words(\%ignore_type, "Ignored");
1095
1096 if (!$perl_version_ok) {
1097 print << "EOM"
1098
1099NOTE: perl $^V is not modern enough to detect all possible issues.
1100 An upgrade to at least perl $minimum_perl_version is suggested.
1101EOM
1102 }
1103 if ($exit) {
1104 print << "EOM"
1105
1106NOTE: If any of the errors are false positives, please report
1107 them to the maintainer, see CHECKPATCH in MAINTAINERS.
1108EOM
1109 }
1110}
1111
1112exit($exit);
1113
1114sub top_of_kernel_tree {
1115 my ($root) = @_;
1116
1117 my @tree_check = (
1118 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
1119 "README", "Documentation", "arch", "include", "drivers",
1120 "fs", "init", "ipc", "kernel", "lib", "scripts",
1121 );
1122
1123 foreach my $check (@tree_check) {
1124 if (! -e $root . '/' . $check) {
1125 return 0;
1126 }
1127 }
1128 return 1;
1129}
1130
1131sub parse_email {
1132 my ($formatted_email) = @_;
1133
1134 my $name = "";
1135 my $name_comment = "";
1136 my $address = "";
1137 my $comment = "";
1138
1139 if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
1140 $name = $1;
1141 $address = $2;
1142 $comment = $3 if defined $3;
1143 } elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
1144 $address = $1;
1145 $comment = $2 if defined $2;
1146 } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
1147 $address = $1;
1148 $comment = $2 if defined $2;
1149 $formatted_email =~ s/\Q$address\E.*$//;
1150 $name = $formatted_email;
1151 $name = trim($name);
1152 $name =~ s/^\"|\"$//g;
1153 # If there's a name left after stripping spaces and
1154 # leading quotes, and the address doesn't have both
1155 # leading and trailing angle brackets, the address
1156 # is invalid. ie:
1157 # "joe smith joe@smith.com" bad
1158 # "joe smith <joe@smith.com" bad
1159 if ($name ne "" && $address !~ /^<[^>]+>$/) {
1160 $name = "";
1161 $address = "";
1162 $comment = "";
1163 }
1164 }
1165
1166 $name = trim($name);
1167 $name =~ s/^\"|\"$//g;
1168 $name =~ s/(\s*\([^\)]+\))\s*//;
1169 if (defined($1)) {
1170 $name_comment = trim($1);
1171 }
1172 $address = trim($address);
1173 $address =~ s/^\<|\>$//g;
1174
1175 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1176 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1177 $name = "\"$name\"";
1178 }
1179
1180 return ($name, $name_comment, $address, $comment);
1181}
1182
1183sub format_email {
1184 my ($name, $address) = @_;
1185
1186 my $formatted_email;
1187
1188 $name = trim($name);
1189 $name =~ s/^\"|\"$//g;
1190 $address = trim($address);
1191
1192 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1193 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1194 $name = "\"$name\"";
1195 }
1196
1197 if ("$name" eq "") {
1198 $formatted_email = "$address";
1199 } else {
1200 $formatted_email = "$name <$address>";
1201 }
1202
1203 return $formatted_email;
1204}
1205
1206sub reformat_email {
1207 my ($email) = @_;
1208
1209 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
1210 return format_email($email_name, $email_address);
1211}
1212
1213sub same_email_addresses {
1214 my ($email1, $email2) = @_;
1215
1216 my ($email1_name, $name1_comment, $email1_address, $comment1) = parse_email($email1);
1217 my ($email2_name, $name2_comment, $email2_address, $comment2) = parse_email($email2);
1218
1219 return $email1_name eq $email2_name &&
1220 $email1_address eq $email2_address;
1221}
1222
1223sub which {
1224 my ($bin) = @_;
1225
1226 foreach my $path (split(/:/, $ENV{PATH})) {
1227 if (-e "$path/$bin") {
1228 return "$path/$bin";
1229 }
1230 }
1231
1232 return "";
1233}
1234
1235sub which_conf {
1236 my ($conf) = @_;
1237
1238 foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1239 if (-e "$path/$conf") {
1240 return "$path/$conf";
1241 }
1242 }
1243
1244 return "";
1245}
1246
1247sub expand_tabs {
1248 my ($str) = @_;
1249
1250 my $res = '';
1251 my $n = 0;
1252 for my $c (split(//, $str)) {
1253 if ($c eq "\t") {
1254 $res .= ' ';
1255 $n++;
1256 for (; ($n % $tabsize) != 0; $n++) {
1257 $res .= ' ';
1258 }
1259 next;
1260 }
1261 $res .= $c;
1262 $n++;
1263 }
1264
1265 return $res;
1266}
1267sub copy_spacing {
1268 (my $res = shift) =~ tr/\t/ /c;
1269 return $res;
1270}
1271
1272sub line_stats {
1273 my ($line) = @_;
1274
1275 # Drop the diff line leader and expand tabs
1276 $line =~ s/^.//;
1277 $line = expand_tabs($line);
1278
1279 # Pick the indent from the front of the line.
1280 my ($white) = ($line =~ /^(\s*)/);
1281
1282 return (length($line), length($white));
1283}
1284
1285my $sanitise_quote = '';
1286
1287sub sanitise_line_reset {
1288 my ($in_comment) = @_;
1289
1290 if ($in_comment) {
1291 $sanitise_quote = '*/';
1292 } else {
1293 $sanitise_quote = '';
1294 }
1295}
1296sub sanitise_line {
1297 my ($line) = @_;
1298
1299 my $res = '';
1300 my $l = '';
1301
1302 my $qlen = 0;
1303 my $off = 0;
1304 my $c;
1305
1306 # Always copy over the diff marker.
1307 $res = substr($line, 0, 1);
1308
1309 for ($off = 1; $off < length($line); $off++) {
1310 $c = substr($line, $off, 1);
1311
1312 # Comments we are whacking completely including the begin
1313 # and end, all to $;.
1314 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
1315 $sanitise_quote = '*/';
1316
1317 substr($res, $off, 2, "$;$;");
1318 $off++;
1319 next;
1320 }
1321 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
1322 $sanitise_quote = '';
1323 substr($res, $off, 2, "$;$;");
1324 $off++;
1325 next;
1326 }
1327 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
1328 $sanitise_quote = '//';
1329
1330 substr($res, $off, 2, $sanitise_quote);
1331 $off++;
1332 next;
1333 }
1334
1335 # A \ in a string means ignore the next character.
1336 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
1337 $c eq "\\") {
1338 substr($res, $off, 2, 'XX');
1339 $off++;
1340 next;
1341 }
1342 # Regular quotes.
1343 if ($c eq "'" || $c eq '"') {
1344 if ($sanitise_quote eq '') {
1345 $sanitise_quote = $c;
1346
1347 substr($res, $off, 1, $c);
1348 next;
1349 } elsif ($sanitise_quote eq $c) {
1350 $sanitise_quote = '';
1351 }
1352 }
1353
1354 #print "c<$c> SQ<$sanitise_quote>\n";
1355 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
1356 substr($res, $off, 1, $;);
1357 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
1358 substr($res, $off, 1, $;);
1359 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
1360 substr($res, $off, 1, 'X');
1361 } else {
1362 substr($res, $off, 1, $c);
1363 }
1364 }
1365
1366 if ($sanitise_quote eq '//') {
1367 $sanitise_quote = '';
1368 }
1369
1370 # The pathname on a #include may be surrounded by '<' and '>'.
1371 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
1372 my $clean = 'X' x length($1);
1373 $res =~ s@\<.*\>@<$clean>@;
1374
1375 # The whole of a #error is a string.
1376 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
1377 my $clean = 'X' x length($1);
1378 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
1379 }
1380
1381 if ($allow_c99_comments && $res =~ m@(//.*$)@) {
1382 my $match = $1;
1383 $res =~ s/\Q$match\E/"$;" x length($match)/e;
1384 }
1385
1386 return $res;
1387}
1388
1389sub get_quoted_string {
1390 my ($line, $rawline) = @_;
1391
1392 return "" if (!defined($line) || !defined($rawline));
1393 return "" if ($line !~ m/($String)/g);
1394 return substr($rawline, $-[0], $+[0] - $-[0]);
1395}
1396
1397sub ctx_statement_block {
1398 my ($linenr, $remain, $off) = @_;
1399 my $line = $linenr - 1;
1400 my $blk = '';
1401 my $soff = $off;
1402 my $coff = $off - 1;
1403 my $coff_set = 0;
1404
1405 my $loff = 0;
1406
1407 my $type = '';
1408 my $level = 0;
1409 my @stack = ();
1410 my $p;
1411 my $c;
1412 my $len = 0;
1413
1414 my $remainder;
1415 while (1) {
1416 @stack = (['', 0]) if ($#stack == -1);
1417
1418 #warn "CSB: blk<$blk> remain<$remain>\n";
1419 # If we are about to drop off the end, pull in more
1420 # context.
1421 if ($off >= $len) {
1422 for (; $remain > 0; $line++) {
1423 last if (!defined $lines[$line]);
1424 next if ($lines[$line] =~ /^-/);
1425 $remain--;
1426 $loff = $len;
1427 $blk .= $lines[$line] . "\n";
1428 $len = length($blk);
1429 $line++;
1430 last;
1431 }
1432 # Bail if there is no further context.
1433 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
1434 if ($off >= $len) {
1435 last;
1436 }
1437 if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
1438 $level++;
1439 $type = '#';
1440 }
1441 }
1442 $p = $c;
1443 $c = substr($blk, $off, 1);
1444 $remainder = substr($blk, $off);
1445
1446 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
1447
1448 # Handle nested #if/#else.
1449 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
1450 push(@stack, [ $type, $level ]);
1451 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
1452 ($type, $level) = @{$stack[$#stack - 1]};
1453 } elsif ($remainder =~ /^#\s*endif\b/) {
1454 ($type, $level) = @{pop(@stack)};
1455 }
1456
1457 # Statement ends at the ';' or a close '}' at the
1458 # outermost level.
1459 if ($level == 0 && $c eq ';') {
1460 last;
1461 }
1462
1463 # An else is really a conditional as long as its not else if
1464 if ($level == 0 && $coff_set == 0 &&
1465 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
1466 $remainder =~ /^(else)(?:\s|{)/ &&
1467 $remainder !~ /^else\s+if\b/) {
1468 $coff = $off + length($1) - 1;
1469 $coff_set = 1;
1470 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
1471 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
1472 }
1473
1474 if (($type eq '' || $type eq '(') && $c eq '(') {
1475 $level++;
1476 $type = '(';
1477 }
1478 if ($type eq '(' && $c eq ')') {
1479 $level--;
1480 $type = ($level != 0)? '(' : '';
1481
1482 if ($level == 0 && $coff < $soff) {
1483 $coff = $off;
1484 $coff_set = 1;
1485 #warn "CSB: mark coff<$coff>\n";
1486 }
1487 }
1488 if (($type eq '' || $type eq '{') && $c eq '{') {
1489 $level++;
1490 $type = '{';
1491 }
1492 if ($type eq '{' && $c eq '}') {
1493 $level--;
1494 $type = ($level != 0)? '{' : '';
1495
1496 if ($level == 0) {
1497 if (substr($blk, $off + 1, 1) eq ';') {
1498 $off++;
1499 }
1500 last;
1501 }
1502 }
1503 # Preprocessor commands end at the newline unless escaped.
1504 if ($type eq '#' && $c eq "\n" && $p ne "\\") {
1505 $level--;
1506 $type = '';
1507 $off++;
1508 last;
1509 }
1510 $off++;
1511 }
1512 # We are truly at the end, so shuffle to the next line.
1513 if ($off == $len) {
1514 $loff = $len + 1;
1515 $line++;
1516 $remain--;
1517 }
1518
1519 my $statement = substr($blk, $soff, $off - $soff + 1);
1520 my $condition = substr($blk, $soff, $coff - $soff + 1);
1521
1522 #warn "STATEMENT<$statement>\n";
1523 #warn "CONDITION<$condition>\n";
1524
1525 #print "coff<$coff> soff<$off> loff<$loff>\n";
1526
1527 return ($statement, $condition,
1528 $line, $remain + 1, $off - $loff + 1, $level);
1529}
1530
1531sub statement_lines {
1532 my ($stmt) = @_;
1533
1534 # Strip the diff line prefixes and rip blank lines at start and end.
1535 $stmt =~ s/(^|\n)./$1/g;
1536 $stmt =~ s/^\s*//;
1537 $stmt =~ s/\s*$//;
1538
1539 my @stmt_lines = ($stmt =~ /\n/g);
1540
1541 return $#stmt_lines + 2;
1542}
1543
1544sub statement_rawlines {
1545 my ($stmt) = @_;
1546
1547 my @stmt_lines = ($stmt =~ /\n/g);
1548
1549 return $#stmt_lines + 2;
1550}
1551
1552sub statement_block_size {
1553 my ($stmt) = @_;
1554
1555 $stmt =~ s/(^|\n)./$1/g;
1556 $stmt =~ s/^\s*{//;
1557 $stmt =~ s/}\s*$//;
1558 $stmt =~ s/^\s*//;
1559 $stmt =~ s/\s*$//;
1560
1561 my @stmt_lines = ($stmt =~ /\n/g);
1562 my @stmt_statements = ($stmt =~ /;/g);
1563
1564 my $stmt_lines = $#stmt_lines + 2;
1565 my $stmt_statements = $#stmt_statements + 1;
1566
1567 if ($stmt_lines > $stmt_statements) {
1568 return $stmt_lines;
1569 } else {
1570 return $stmt_statements;
1571 }
1572}
1573
1574sub ctx_statement_full {
1575 my ($linenr, $remain, $off) = @_;
1576 my ($statement, $condition, $level);
1577
1578 my (@chunks);
1579
1580 # Grab the first conditional/block pair.
1581 ($statement, $condition, $linenr, $remain, $off, $level) =
1582 ctx_statement_block($linenr, $remain, $off);
1583 #print "F: c<$condition> s<$statement> remain<$remain>\n";
1584 push(@chunks, [ $condition, $statement ]);
1585 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
1586 return ($level, $linenr, @chunks);
1587 }
1588
1589 # Pull in the following conditional/block pairs and see if they
1590 # could continue the statement.
1591 for (;;) {
1592 ($statement, $condition, $linenr, $remain, $off, $level) =
1593 ctx_statement_block($linenr, $remain, $off);
1594 #print "C: c<$condition> s<$statement> remain<$remain>\n";
1595 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
1596 #print "C: push\n";
1597 push(@chunks, [ $condition, $statement ]);
1598 }
1599
1600 return ($level, $linenr, @chunks);
1601}
1602
1603sub ctx_block_get {
1604 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
1605 my $line;
1606 my $start = $linenr - 1;
1607 my $blk = '';
1608 my @o;
1609 my @c;
1610 my @res = ();
1611
1612 my $level = 0;
1613 my @stack = ($level);
1614 for ($line = $start; $remain > 0; $line++) {
1615 next if ($rawlines[$line] =~ /^-/);
1616 $remain--;
1617
1618 $blk .= $rawlines[$line];
1619
1620 # Handle nested #if/#else.
1621 if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
1622 push(@stack, $level);
1623 } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
1624 $level = $stack[$#stack - 1];
1625 } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
1626 $level = pop(@stack);
1627 }
1628
1629 foreach my $c (split(//, $lines[$line])) {
1630 ##print "C<$c>L<$level><$open$close>O<$off>\n";
1631 if ($off > 0) {
1632 $off--;
1633 next;
1634 }
1635
1636 if ($c eq $close && $level > 0) {
1637 $level--;
1638 last if ($level == 0);
1639 } elsif ($c eq $open) {
1640 $level++;
1641 }
1642 }
1643
1644 if (!$outer || $level <= 1) {
1645 push(@res, $rawlines[$line]);
1646 }
1647
1648 last if ($level == 0);
1649 }
1650
1651 return ($level, @res);
1652}
1653sub ctx_block_outer {
1654 my ($linenr, $remain) = @_;
1655
1656 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
1657 return @r;
1658}
1659sub ctx_block {
1660 my ($linenr, $remain) = @_;
1661
1662 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1663 return @r;
1664}
1665sub ctx_statement {
1666 my ($linenr, $remain, $off) = @_;
1667
1668 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1669 return @r;
1670}
1671sub ctx_block_level {
1672 my ($linenr, $remain) = @_;
1673
1674 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1675}
1676sub ctx_statement_level {
1677 my ($linenr, $remain, $off) = @_;
1678
1679 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1680}
1681
1682sub ctx_locate_comment {
1683 my ($first_line, $end_line) = @_;
1684
1685 # If c99 comment on the current line, or the line before or after
1686 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@^\+.*(//.*$)@);
1687 return $current_comment if (defined $current_comment);
1688 ($current_comment) = ($rawlines[$end_line - 2] =~ m@^[\+ ].*(//.*$)@);
1689 return $current_comment if (defined $current_comment);
1690 ($current_comment) = ($rawlines[$end_line] =~ m@^[\+ ].*(//.*$)@);
1691 return $current_comment if (defined $current_comment);
1692
1693 # Catch a comment on the end of the line itself.
1694 ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
1695 return $current_comment if (defined $current_comment);
1696
1697 # Look through the context and try and figure out if there is a
1698 # comment.
1699 my $in_comment = 0;
1700 $current_comment = '';
1701 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
1702 my $line = $rawlines[$linenr - 1];
1703 #warn " $line\n";
1704 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
1705 $in_comment = 1;
1706 }
1707 if ($line =~ m@/\*@) {
1708 $in_comment = 1;
1709 }
1710 if (!$in_comment && $current_comment ne '') {
1711 $current_comment = '';
1712 }
1713 $current_comment .= $line . "\n" if ($in_comment);
1714 if ($line =~ m@\*/@) {
1715 $in_comment = 0;
1716 }
1717 }
1718
1719 chomp($current_comment);
1720 return($current_comment);
1721}
1722sub ctx_has_comment {
1723 my ($first_line, $end_line) = @_;
1724 my $cmt = ctx_locate_comment($first_line, $end_line);
1725
1726 ##print "LINE: $rawlines[$end_line - 1 ]\n";
1727 ##print "CMMT: $cmt\n";
1728
1729 return ($cmt ne '');
1730}
1731
1732sub raw_line {
1733 my ($linenr, $cnt) = @_;
1734
1735 my $offset = $linenr - 1;
1736 $cnt++;
1737
1738 my $line;
1739 while ($cnt) {
1740 $line = $rawlines[$offset++];
1741 next if (defined($line) && $line =~ /^-/);
1742 $cnt--;
1743 }
1744
1745 return $line;
1746}
1747
1748sub get_stat_real {
1749 my ($linenr, $lc) = @_;
1750
1751 my $stat_real = raw_line($linenr, 0);
1752 for (my $count = $linenr + 1; $count <= $lc; $count++) {
1753 $stat_real = $stat_real . "\n" . raw_line($count, 0);
1754 }
1755
1756 return $stat_real;
1757}
1758
1759sub get_stat_here {
1760 my ($linenr, $cnt, $here) = @_;
1761
1762 my $herectx = $here . "\n";
1763 for (my $n = 0; $n < $cnt; $n++) {
1764 $herectx .= raw_line($linenr, $n) . "\n";
1765 }
1766
1767 return $herectx;
1768}
1769
1770sub cat_vet {
1771 my ($vet) = @_;
1772 my ($res, $coded);
1773
1774 $res = '';
1775 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
1776 $res .= $1;
1777 if ($2 ne '') {
1778 $coded = sprintf("^%c", unpack('C', $2) + 64);
1779 $res .= $coded;
1780 }
1781 }
1782 $res =~ s/$/\$/;
1783
1784 return $res;
1785}
1786
1787my $av_preprocessor = 0;
1788my $av_pending;
1789my @av_paren_type;
1790my $av_pend_colon;
1791
1792sub annotate_reset {
1793 $av_preprocessor = 0;
1794 $av_pending = '_';
1795 @av_paren_type = ('E');
1796 $av_pend_colon = 'O';
1797}
1798
1799sub annotate_values {
1800 my ($stream, $type) = @_;
1801
1802 my $res;
1803 my $var = '_' x length($stream);
1804 my $cur = $stream;
1805
1806 print "$stream\n" if ($dbg_values > 1);
1807
1808 while (length($cur)) {
1809 @av_paren_type = ('E') if ($#av_paren_type < 0);
1810 print " <" . join('', @av_paren_type) .
1811 "> <$type> <$av_pending>" if ($dbg_values > 1);
1812 if ($cur =~ /^(\s+)/o) {
1813 print "WS($1)\n" if ($dbg_values > 1);
1814 if ($1 =~ /\n/ && $av_preprocessor) {
1815 $type = pop(@av_paren_type);
1816 $av_preprocessor = 0;
1817 }
1818
1819 } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') {
1820 print "CAST($1)\n" if ($dbg_values > 1);
1821 push(@av_paren_type, $type);
1822 $type = 'c';
1823
1824 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
1825 print "DECLARE($1)\n" if ($dbg_values > 1);
1826 $type = 'T';
1827
1828 } elsif ($cur =~ /^($Modifier)\s*/) {
1829 print "MODIFIER($1)\n" if ($dbg_values > 1);
1830 $type = 'T';
1831
1832 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
1833 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
1834 $av_preprocessor = 1;
1835 push(@av_paren_type, $type);
1836 if ($2 ne '') {
1837 $av_pending = 'N';
1838 }
1839 $type = 'E';
1840
1841 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
1842 print "UNDEF($1)\n" if ($dbg_values > 1);
1843 $av_preprocessor = 1;
1844 push(@av_paren_type, $type);
1845
1846 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
1847 print "PRE_START($1)\n" if ($dbg_values > 1);
1848 $av_preprocessor = 1;
1849
1850 push(@av_paren_type, $type);
1851 push(@av_paren_type, $type);
1852 $type = 'E';
1853
1854 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
1855 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
1856 $av_preprocessor = 1;
1857
1858 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
1859
1860 $type = 'E';
1861
1862 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
1863 print "PRE_END($1)\n" if ($dbg_values > 1);
1864
1865 $av_preprocessor = 1;
1866
1867 # Assume all arms of the conditional end as this
1868 # one does, and continue as if the #endif was not here.
1869 pop(@av_paren_type);
1870 push(@av_paren_type, $type);
1871 $type = 'E';
1872
1873 } elsif ($cur =~ /^(\\\n)/o) {
1874 print "PRECONT($1)\n" if ($dbg_values > 1);
1875
1876 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
1877 print "ATTR($1)\n" if ($dbg_values > 1);
1878 $av_pending = $type;
1879 $type = 'N';
1880
1881 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
1882 print "SIZEOF($1)\n" if ($dbg_values > 1);
1883 if (defined $2) {
1884 $av_pending = 'V';
1885 }
1886 $type = 'N';
1887
1888 } elsif ($cur =~ /^(if|while|for)\b/o) {
1889 print "COND($1)\n" if ($dbg_values > 1);
1890 $av_pending = 'E';
1891 $type = 'N';
1892
1893 } elsif ($cur =~/^(case)/o) {
1894 print "CASE($1)\n" if ($dbg_values > 1);
1895 $av_pend_colon = 'C';
1896 $type = 'N';
1897
1898 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
1899 print "KEYWORD($1)\n" if ($dbg_values > 1);
1900 $type = 'N';
1901
1902 } elsif ($cur =~ /^(\()/o) {
1903 print "PAREN('$1')\n" if ($dbg_values > 1);
1904 push(@av_paren_type, $av_pending);
1905 $av_pending = '_';
1906 $type = 'N';
1907
1908 } elsif ($cur =~ /^(\))/o) {
1909 my $new_type = pop(@av_paren_type);
1910 if ($new_type ne '_') {
1911 $type = $new_type;
1912 print "PAREN('$1') -> $type\n"
1913 if ($dbg_values > 1);
1914 } else {
1915 print "PAREN('$1')\n" if ($dbg_values > 1);
1916 }
1917
1918 } elsif ($cur =~ /^($Ident)\s*\(/o) {
1919 print "FUNC($1)\n" if ($dbg_values > 1);
1920 $type = 'V';
1921 $av_pending = 'V';
1922
1923 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
1924 if (defined $2 && $type eq 'C' || $type eq 'T') {
1925 $av_pend_colon = 'B';
1926 } elsif ($type eq 'E') {
1927 $av_pend_colon = 'L';
1928 }
1929 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
1930 $type = 'V';
1931
1932 } elsif ($cur =~ /^($Ident|$Constant)/o) {
1933 print "IDENT($1)\n" if ($dbg_values > 1);
1934 $type = 'V';
1935
1936 } elsif ($cur =~ /^($Assignment)/o) {
1937 print "ASSIGN($1)\n" if ($dbg_values > 1);
1938 $type = 'N';
1939
1940 } elsif ($cur =~/^(;|{|})/) {
1941 print "END($1)\n" if ($dbg_values > 1);
1942 $type = 'E';
1943 $av_pend_colon = 'O';
1944
1945 } elsif ($cur =~/^(,)/) {
1946 print "COMMA($1)\n" if ($dbg_values > 1);
1947 $type = 'C';
1948
1949 } elsif ($cur =~ /^(\?)/o) {
1950 print "QUESTION($1)\n" if ($dbg_values > 1);
1951 $type = 'N';
1952
1953 } elsif ($cur =~ /^(:)/o) {
1954 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
1955
1956 substr($var, length($res), 1, $av_pend_colon);
1957 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
1958 $type = 'E';
1959 } else {
1960 $type = 'N';
1961 }
1962 $av_pend_colon = 'O';
1963
1964 } elsif ($cur =~ /^(\[)/o) {
1965 print "CLOSE($1)\n" if ($dbg_values > 1);
1966 $type = 'N';
1967
1968 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
1969 my $variant;
1970
1971 print "OPV($1)\n" if ($dbg_values > 1);
1972 if ($type eq 'V') {
1973 $variant = 'B';
1974 } else {
1975 $variant = 'U';
1976 }
1977
1978 substr($var, length($res), 1, $variant);
1979 $type = 'N';
1980
1981 } elsif ($cur =~ /^($Operators)/o) {
1982 print "OP($1)\n" if ($dbg_values > 1);
1983 if ($1 ne '++' && $1 ne '--') {
1984 $type = 'N';
1985 }
1986
1987 } elsif ($cur =~ /(^.)/o) {
1988 print "C($1)\n" if ($dbg_values > 1);
1989 }
1990 if (defined $1) {
1991 $cur = substr($cur, length($1));
1992 $res .= $type x length($1);
1993 }
1994 }
1995
1996 return ($res, $var);
1997}
1998
1999sub possible {
2000 my ($possible, $line) = @_;
2001 my $notPermitted = qr{(?:
2002 ^(?:
2003 $Modifier|
2004 $Storage|
2005 $Type|
2006 DEFINE_\S+
2007 )$|
2008 ^(?:
2009 goto|
2010 return|
2011 case|
2012 else|
2013 asm|__asm__|
2014 do|
2015 \#|
2016 \#\#|
2017 )(?:\s|$)|
2018 ^(?:typedef|struct|enum)\b
2019 )}x;
2020 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
2021 if ($possible !~ $notPermitted) {
2022 # Check for modifiers.
2023 $possible =~ s/\s*$Storage\s*//g;
2024 $possible =~ s/\s*$Sparse\s*//g;
2025 if ($possible =~ /^\s*$/) {
2026
2027 } elsif ($possible =~ /\s/) {
2028 $possible =~ s/\s*$Type\s*//g;
2029 for my $modifier (split(' ', $possible)) {
2030 if ($modifier !~ $notPermitted) {
2031 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
2032 push(@modifierListFile, $modifier);
2033 }
2034 }
2035
2036 } else {
2037 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
2038 push(@typeListFile, $possible);
2039 }
2040 build_types();
2041 } else {
2042 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
2043 }
2044}
2045
2046my $prefix = '';
2047
2048sub show_type {
2049 my ($type) = @_;
2050
2051 $type =~ tr/[a-z]/[A-Z]/;
2052
2053 return defined $use_type{$type} if (scalar keys %use_type > 0);
2054
2055 return !defined $ignore_type{$type};
2056}
2057
2058sub report {
2059 my ($level, $type, $msg) = @_;
2060
2061 if (!show_type($type) ||
2062 (defined $tst_only && $msg !~ /\Q$tst_only\E/)) {
2063 return 0;
2064 }
2065 my $output = '';
2066 if ($color) {
2067 if ($level eq 'ERROR') {
2068 $output .= RED;
2069 } elsif ($level eq 'WARNING') {
2070 $output .= YELLOW;
2071 } else {
2072 $output .= GREEN;
2073 }
2074 }
2075 $output .= $prefix . $level . ':';
2076 if ($show_types) {
2077 $output .= BLUE if ($color);
2078 $output .= "$type:";
2079 }
2080 $output .= RESET if ($color);
2081 $output .= ' ' . $msg . "\n";
2082
2083 if ($showfile) {
2084 my @lines = split("\n", $output, -1);
2085 splice(@lines, 1, 1);
2086 $output = join("\n", @lines);
2087 }
2088 $output = (split('\n', $output))[0] . "\n" if ($terse);
2089
2090 push(our @report, $output);
2091
2092 return 1;
2093}
2094
2095sub report_dump {
2096 our @report;
2097}
2098
2099sub fixup_current_range {
2100 my ($lineRef, $offset, $length) = @_;
2101
2102 if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) {
2103 my $o = $1;
2104 my $l = $2;
2105 my $no = $o + $offset;
2106 my $nl = $l + $length;
2107 $$lineRef =~ s/\+$o,$l \@\@/\+$no,$nl \@\@/;
2108 }
2109}
2110
2111sub fix_inserted_deleted_lines {
2112 my ($linesRef, $insertedRef, $deletedRef) = @_;
2113
2114 my $range_last_linenr = 0;
2115 my $delta_offset = 0;
2116
2117 my $old_linenr = 0;
2118 my $new_linenr = 0;
2119
2120 my $next_insert = 0;
2121 my $next_delete = 0;
2122
2123 my @lines = ();
2124
2125 my $inserted = @{$insertedRef}[$next_insert++];
2126 my $deleted = @{$deletedRef}[$next_delete++];
2127
2128 foreach my $old_line (@{$linesRef}) {
2129 my $save_line = 1;
2130 my $line = $old_line; #don't modify the array
2131 if ($line =~ /^(?:\+\+\+|\-\-\-)\s+\S+/) { #new filename
2132 $delta_offset = 0;
2133 } elsif ($line =~ /^\@\@ -\d+,\d+ \+\d+,\d+ \@\@/) { #new hunk
2134 $range_last_linenr = $new_linenr;
2135 fixup_current_range(\$line, $delta_offset, 0);
2136 }
2137
2138 while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) {
2139 $deleted = @{$deletedRef}[$next_delete++];
2140 $save_line = 0;
2141 fixup_current_range(\$lines[$range_last_linenr], $delta_offset--, -1);
2142 }
2143
2144 while (defined($inserted) && ${$inserted}{'LINENR'} == $old_linenr) {
2145 push(@lines, ${$inserted}{'LINE'});
2146 $inserted = @{$insertedRef}[$next_insert++];
2147 $new_linenr++;
2148 fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1);
2149 }
2150
2151 if ($save_line) {
2152 push(@lines, $line);
2153 $new_linenr++;
2154 }
2155
2156 $old_linenr++;
2157 }
2158
2159 return @lines;
2160}
2161
2162sub fix_insert_line {
2163 my ($linenr, $line) = @_;
2164
2165 my $inserted = {
2166 LINENR => $linenr,
2167 LINE => $line,
2168 };
2169 push(@fixed_inserted, $inserted);
2170}
2171
2172sub fix_delete_line {
2173 my ($linenr, $line) = @_;
2174
2175 my $deleted = {
2176 LINENR => $linenr,
2177 LINE => $line,
2178 };
2179
2180 push(@fixed_deleted, $deleted);
2181}
2182
2183sub ERROR {
2184 my ($type, $msg) = @_;
2185
2186 if (report("ERROR", $type, $msg)) {
2187 our $clean = 0;
2188 our $cnt_error++;
2189 return 1;
2190 }
2191 return 0;
2192}
2193sub WARN {
2194 my ($type, $msg) = @_;
2195
2196 if (report("WARNING", $type, $msg)) {
2197 our $clean = 0;
2198 our $cnt_warn++;
2199 return 1;
2200 }
2201 return 0;
2202}
2203sub CHK {
2204 my ($type, $msg) = @_;
2205
2206 if ($check && report("CHECK", $type, $msg)) {
2207 our $clean = 0;
2208 our $cnt_chk++;
2209 return 1;
2210 }
2211 return 0;
2212}
2213
2214sub check_absolute_file {
2215 my ($absolute, $herecurr) = @_;
2216 my $file = $absolute;
2217
2218 ##print "absolute<$absolute>\n";
2219
2220 # See if any suffix of this path is a path within the tree.
2221 while ($file =~ s@^[^/]*/@@) {
2222 if (-f "$root/$file") {
2223 ##print "file<$file>\n";
2224 last;
2225 }
2226 }
2227 if (! -f _) {
2228 return 0;
2229 }
2230
2231 # It is, so see if the prefix is acceptable.
2232 my $prefix = $absolute;
2233 substr($prefix, -length($file)) = '';
2234
2235 ##print "prefix<$prefix>\n";
2236 if ($prefix ne ".../") {
2237 WARN("USE_RELATIVE_PATH",
2238 "use relative pathname instead of absolute in changelog text\n" . $herecurr);
2239 }
2240}
2241
2242sub trim {
2243 my ($string) = @_;
2244
2245 $string =~ s/^\s+|\s+$//g;
2246
2247 return $string;
2248}
2249
2250sub ltrim {
2251 my ($string) = @_;
2252
2253 $string =~ s/^\s+//;
2254
2255 return $string;
2256}
2257
2258sub rtrim {
2259 my ($string) = @_;
2260
2261 $string =~ s/\s+$//;
2262
2263 return $string;
2264}
2265
2266sub string_find_replace {
2267 my ($string, $find, $replace) = @_;
2268
2269 $string =~ s/$find/$replace/g;
2270
2271 return $string;
2272}
2273
2274sub tabify {
2275 my ($leading) = @_;
2276
2277 my $source_indent = $tabsize;
2278 my $max_spaces_before_tab = $source_indent - 1;
2279 my $spaces_to_tab = " " x $source_indent;
2280
2281 #convert leading spaces to tabs
2282 1 while $leading =~ s@^([\t]*)$spaces_to_tab@$1\t@g;
2283 #Remove spaces before a tab
2284 1 while $leading =~ s@^([\t]*)( {1,$max_spaces_before_tab})\t@$1\t@g;
2285
2286 return "$leading";
2287}
2288
2289sub pos_last_openparen {
2290 my ($line) = @_;
2291
2292 my $pos = 0;
2293
2294 my $opens = $line =~ tr/\(/\(/;
2295 my $closes = $line =~ tr/\)/\)/;
2296
2297 my $last_openparen = 0;
2298
2299 if (($opens == 0) || ($closes >= $opens)) {
2300 return -1;
2301 }
2302
2303 my $len = length($line);
2304
2305 for ($pos = 0; $pos < $len; $pos++) {
2306 my $string = substr($line, $pos);
2307 if ($string =~ /^($FuncArg|$balanced_parens)/) {
2308 $pos += length($1) - 1;
2309 } elsif (substr($line, $pos, 1) eq '(') {
2310 $last_openparen = $pos;
2311 } elsif (index($string, '(') == -1) {
2312 last;
2313 }
2314 }
2315
2316 return length(expand_tabs(substr($line, 0, $last_openparen))) + 1;
2317}
2318
2319sub get_raw_comment {
2320 my ($line, $rawline) = @_;
2321 my $comment = '';
2322
2323 for my $i (0 .. (length($line) - 1)) {
2324 if (substr($line, $i, 1) eq "$;") {
2325 $comment .= substr($rawline, $i, 1);
2326 }
2327 }
2328
2329 return $comment;
2330}
2331
2332sub process {
2333 my $filename = shift;
2334
2335 my $linenr=0;
2336 my $prevline="";
2337 my $prevrawline="";
2338 my $stashline="";
2339 my $stashrawline="";
2340
2341 my $length;
2342 my $indent;
2343 my $previndent=0;
2344 my $stashindent=0;
2345
2346 our $clean = 1;
2347 my $signoff = 0;
2348 my $author = '';
2349 my $authorsignoff = 0;
2350 my $is_patch = 0;
2351 my $is_binding_patch = -1;
2352 my $in_header_lines = $file ? 0 : 1;
2353 my $in_commit_log = 0; #Scanning lines before patch
2354 my $has_patch_separator = 0; #Found a --- line
2355 my $has_commit_log = 0; #Encountered lines before patch
2356 my $commit_log_lines = 0; #Number of commit log lines
2357 my $commit_log_possible_stack_dump = 0;
2358 my $commit_log_long_line = 0;
2359 my $commit_log_has_diff = 0;
2360 my $reported_maintainer_file = 0;
2361 my $non_utf8_charset = 0;
2362
2363 my $last_blank_line = 0;
2364 my $last_coalesced_string_linenr = -1;
2365
2366 our @report = ();
2367 our $cnt_lines = 0;
2368 our $cnt_error = 0;
2369 our $cnt_warn = 0;
2370 our $cnt_chk = 0;
2371
2372 # Trace the real file/line as we go.
2373 my $realfile = '';
2374 my $realline = 0;
2375 my $realcnt = 0;
2376 my $here = '';
2377 my $context_function; #undef'd unless there's a known function
2378 my $in_comment = 0;
2379 my $comment_edge = 0;
2380 my $first_line = 0;
2381 my $p1_prefix = '';
2382
2383 my $prev_values = 'E';
2384
2385 # suppression flags
2386 my %suppress_ifbraces;
2387 my %suppress_whiletrailers;
2388 my %suppress_export;
2389 my $suppress_statement = 0;
2390
2391 my %signatures = ();
2392
2393 # Pre-scan the patch sanitizing the lines.
2394 # Pre-scan the patch looking for any __setup documentation.
2395 #
2396 my @setup_docs = ();
2397 my $setup_docs = 0;
2398
2399 my $camelcase_file_seeded = 0;
2400
2401 my $checklicenseline = 1;
2402
2403 sanitise_line_reset();
2404 my $line;
2405 foreach my $rawline (@rawlines) {
2406 $linenr++;
2407 $line = $rawline;
2408
2409 push(@fixed, $rawline) if ($fix);
2410
2411 if ($rawline=~/^\+\+\+\s+(\S+)/) {
2412 $setup_docs = 0;
2413 if ($1 =~ m@Documentation/admin-guide/kernel-parameters.txt$@) {
2414 $setup_docs = 1;
2415 }
2416 #next;
2417 }
2418 if ($rawline =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
2419 $realline=$1-1;
2420 if (defined $2) {
2421 $realcnt=$3+1;
2422 } else {
2423 $realcnt=1+1;
2424 }
2425 $in_comment = 0;
2426
2427 # Guestimate if this is a continuing comment. Run
2428 # the context looking for a comment "edge". If this
2429 # edge is a close comment then we must be in a comment
2430 # at context start.
2431 my $edge;
2432 my $cnt = $realcnt;
2433 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
2434 next if (defined $rawlines[$ln - 1] &&
2435 $rawlines[$ln - 1] =~ /^-/);
2436 $cnt--;
2437 #print "RAW<$rawlines[$ln - 1]>\n";
2438 last if (!defined $rawlines[$ln - 1]);
2439 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
2440 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
2441 ($edge) = $1;
2442 last;
2443 }
2444 }
2445 if (defined $edge && $edge eq '*/') {
2446 $in_comment = 1;
2447 }
2448
2449 # Guestimate if this is a continuing comment. If this
2450 # is the start of a diff block and this line starts
2451 # ' *' then it is very likely a comment.
2452 if (!defined $edge &&
2453 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
2454 {
2455 $in_comment = 1;
2456 }
2457
2458 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
2459 sanitise_line_reset($in_comment);
2460
2461 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
2462 # Standardise the strings and chars within the input to
2463 # simplify matching -- only bother with positive lines.
2464 $line = sanitise_line($rawline);
2465 }
2466 push(@lines, $line);
2467
2468 if ($realcnt > 1) {
2469 $realcnt-- if ($line =~ /^(?:\+| |$)/);
2470 } else {
2471 $realcnt = 0;
2472 }
2473
2474 #print "==>$rawline\n";
2475 #print "-->$line\n";
2476
2477 if ($setup_docs && $line =~ /^\+/) {
2478 push(@setup_docs, $line);
2479 }
2480 }
2481
2482 $prefix = '';
2483
2484 $realcnt = 0;
2485 $linenr = 0;
2486 $fixlinenr = -1;
2487 foreach my $line (@lines) {
2488 $linenr++;
2489 $fixlinenr++;
2490 my $sline = $line; #copy of $line
2491 $sline =~ s/$;/ /g; #with comments as spaces
2492
2493 my $rawline = $rawlines[$linenr - 1];
2494 my $raw_comment = get_raw_comment($line, $rawline);
2495
2496# check if it's a mode change, rename or start of a patch
2497 if (!$in_commit_log &&
2498 ($line =~ /^ mode change [0-7]+ => [0-7]+ \S+\s*$/ ||
2499 ($line =~ /^rename (?:from|to) \S+\s*$/ ||
2500 $line =~ /^diff --git a\/[\w\/\.\_\-]+ b\/\S+\s*$/))) {
2501 $is_patch = 1;
2502 }
2503
2504#extract the line range in the file after the patch is applied
2505 if (!$in_commit_log &&
2506 $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) {
2507 my $context = $4;
2508 $is_patch = 1;
2509 $first_line = $linenr + 1;
2510 $realline=$1-1;
2511 if (defined $2) {
2512 $realcnt=$3+1;
2513 } else {
2514 $realcnt=1+1;
2515 }
2516 annotate_reset();
2517 $prev_values = 'E';
2518
2519 %suppress_ifbraces = ();
2520 %suppress_whiletrailers = ();
2521 %suppress_export = ();
2522 $suppress_statement = 0;
2523 if ($context =~ /\b(\w+)\s*\(/) {
2524 $context_function = $1;
2525 } else {
2526 undef $context_function;
2527 }
2528 next;
2529
2530# track the line number as we move through the hunk, note that
2531# new versions of GNU diff omit the leading space on completely
2532# blank context lines so we need to count that too.
2533 } elsif ($line =~ /^( |\+|$)/) {
2534 $realline++;
2535 $realcnt-- if ($realcnt != 0);
2536
2537 # Measure the line length and indent.
2538 ($length, $indent) = line_stats($rawline);
2539
2540 # Track the previous line.
2541 ($prevline, $stashline) = ($stashline, $line);
2542 ($previndent, $stashindent) = ($stashindent, $indent);
2543 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
2544
2545 #warn "line<$line>\n";
2546
2547 } elsif ($realcnt == 1) {
2548 $realcnt--;
2549 }
2550
2551 my $hunk_line = ($realcnt != 0);
2552
2553 $here = "#$linenr: " if (!$file);
2554 $here = "#$realline: " if ($file);
2555
2556 my $found_file = 0;
2557 # extract the filename as it passes
2558 if ($line =~ /^diff --git.*?(\S+)$/) {
2559 $realfile = $1;
2560 $realfile =~ s@^([^/]*)/@@ if (!$file);
2561 $in_commit_log = 0;
2562 $found_file = 1;
2563 } elsif ($line =~ /^\+\+\+\s+(\S+)/) {
2564 $realfile = $1;
2565 $realfile =~ s@^([^/]*)/@@ if (!$file);
2566 $in_commit_log = 0;
2567
2568 $p1_prefix = $1;
2569 if (!$file && $tree && $p1_prefix ne '' &&
2570 -e "$root/$p1_prefix") {
2571 WARN("PATCH_PREFIX",
2572 "patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
2573 }
2574
2575 if ($realfile =~ m@^include/asm/@) {
2576 ERROR("MODIFIED_INCLUDE_ASM",
2577 "do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
2578 }
2579 $found_file = 1;
2580 }
2581
2582#make up the handle for any error we report on this line
2583 if ($showfile) {
2584 $prefix = "$realfile:$realline: "
2585 } elsif ($emacs) {
2586 if ($file) {
2587 $prefix = "$filename:$realline: ";
2588 } else {
2589 $prefix = "$filename:$linenr: ";
2590 }
2591 }
2592
2593 if ($found_file) {
2594 if (is_maintained_obsolete($realfile)) {
2595 WARN("OBSOLETE",
2596 "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy. No unnecessary modifications please.\n");
2597 }
2598 if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
2599 $check = 1;
2600 } else {
2601 $check = $check_orig;
2602 }
2603 $checklicenseline = 1;
2604
2605 if ($realfile !~ /^MAINTAINERS/) {
2606 my $last_binding_patch = $is_binding_patch;
2607
2608 $is_binding_patch = () = $realfile =~ m@^(?:Documentation/devicetree/|include/dt-bindings/)@;
2609
2610 if (($last_binding_patch != -1) &&
2611 ($last_binding_patch ^ $is_binding_patch)) {
2612 WARN("DT_SPLIT_BINDING_PATCH",
2613 "DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.rst\n");
2614 }
2615 }
2616
2617 next;
2618 }
2619
2620 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
2621
2622 my $hereline = "$here\n$rawline\n";
2623 my $herecurr = "$here\n$rawline\n";
2624 my $hereprev = "$here\n$prevrawline\n$rawline\n";
2625
2626 $cnt_lines++ if ($realcnt != 0);
2627
2628# Verify the existence of a commit log if appropriate
2629# 2 is used because a $signature is counted in $commit_log_lines
2630 if ($in_commit_log) {
2631 if ($line !~ /^\s*$/) {
2632 $commit_log_lines++; #could be a $signature
2633 }
2634 } elsif ($has_commit_log && $commit_log_lines < 2) {
2635 WARN("COMMIT_MESSAGE",
2636 "Missing commit description - Add an appropriate one\n");
2637 $commit_log_lines = 2; #warn only once
2638 }
2639
2640# Check if the commit log has what seems like a diff which can confuse patch
2641 if ($in_commit_log && !$commit_log_has_diff &&
2642 (($line =~ m@^\s+diff\b.*a/([\w/]+)@ &&
2643 $line =~ m@^\s+diff\b.*a/[\w/]+\s+b/$1\b@) ||
2644 $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ ||
2645 $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) {
2646 ERROR("DIFF_IN_COMMIT_MSG",
2647 "Avoid using diff content in the commit message - patch(1) might not work\n" . $herecurr);
2648 $commit_log_has_diff = 1;
2649 }
2650
2651# Check for incorrect file permissions
2652 if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
2653 my $permhere = $here . "FILE: $realfile\n";
2654 if ($realfile !~ m@scripts/@ &&
2655 $realfile !~ /\.(py|pl|awk|sh)$/) {
2656 ERROR("EXECUTE_PERMISSIONS",
2657 "do not set execute permissions for source files\n" . $permhere);
2658 }
2659 }
2660
2661# Check the patch for a From:
2662 if (decode("MIME-Header", $line) =~ /^From:\s*(.*)/) {
2663 $author = $1;
2664 $author = encode("utf8", $author) if ($line =~ /=\?utf-8\?/i);
2665 $author =~ s/"//g;
2666 $author = reformat_email($author);
2667 }
2668
2669# Check the patch for a signoff:
2670 if ($line =~ /^\s*signed-off-by:\s*(.*)/i) {
2671 $signoff++;
2672 $in_commit_log = 0;
2673 if ($author ne '') {
2674 if (same_email_addresses($1, $author)) {
2675 $authorsignoff = 1;
2676 }
2677 }
2678 }
2679
2680# Check for patch separator
2681 if ($line =~ /^---$/) {
2682 $has_patch_separator = 1;
2683 $in_commit_log = 0;
2684 }
2685
2686# Check if MAINTAINERS is being updated. If so, there's probably no need to
2687# emit the "does MAINTAINERS need updating?" message on file add/move/delete
2688 if ($line =~ /^\s*MAINTAINERS\s*\|/) {
2689 $reported_maintainer_file = 1;
2690 }
2691
2692# Check signature styles
2693 if (!$in_header_lines &&
2694 $line =~ /^(\s*)([a-z0-9_-]+by:|$signature_tags)(\s*)(.*)/i) {
2695 my $space_before = $1;
2696 my $sign_off = $2;
2697 my $space_after = $3;
2698 my $email = $4;
2699 my $ucfirst_sign_off = ucfirst(lc($sign_off));
2700
2701 if ($sign_off !~ /$signature_tags/) {
2702 WARN("BAD_SIGN_OFF",
2703 "Non-standard signature: $sign_off\n" . $herecurr);
2704 }
2705 if (defined $space_before && $space_before ne "") {
2706 if (WARN("BAD_SIGN_OFF",
2707 "Do not use whitespace before $ucfirst_sign_off\n" . $herecurr) &&
2708 $fix) {
2709 $fixed[$fixlinenr] =
2710 "$ucfirst_sign_off $email";
2711 }
2712 }
2713 if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) {
2714 if (WARN("BAD_SIGN_OFF",
2715 "'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr) &&
2716 $fix) {
2717 $fixed[$fixlinenr] =
2718 "$ucfirst_sign_off $email";
2719 }
2720
2721 }
2722 if (!defined $space_after || $space_after ne " ") {
2723 if (WARN("BAD_SIGN_OFF",
2724 "Use a single space after $ucfirst_sign_off\n" . $herecurr) &&
2725 $fix) {
2726 $fixed[$fixlinenr] =
2727 "$ucfirst_sign_off $email";
2728 }
2729 }
2730
2731 my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
2732 my $suggested_email = format_email(($email_name, $email_address));
2733 if ($suggested_email eq "") {
2734 ERROR("BAD_SIGN_OFF",
2735 "Unrecognized email address: '$email'\n" . $herecurr);
2736 } else {
2737 my $dequoted = $suggested_email;
2738 $dequoted =~ s/^"//;
2739 $dequoted =~ s/" </ </;
2740 # Don't force email to have quotes
2741 # Allow just an angle bracketed address
2742 if (!same_email_addresses($email, $suggested_email)) {
2743 WARN("BAD_SIGN_OFF",
2744 "email address '$email' might be better as '$suggested_email$comment'\n" . $herecurr);
2745 }
2746 }
2747
2748# Check for duplicate signatures
2749 my $sig_nospace = $line;
2750 $sig_nospace =~ s/\s//g;
2751 $sig_nospace = lc($sig_nospace);
2752 if (defined $signatures{$sig_nospace}) {
2753 WARN("BAD_SIGN_OFF",
2754 "Duplicate signature\n" . $herecurr);
2755 } else {
2756 $signatures{$sig_nospace} = 1;
2757 }
2758
2759# Check Co-developed-by: immediately followed by Signed-off-by: with same name and email
2760 if ($sign_off =~ /^co-developed-by:$/i) {
2761 if ($email eq $author) {
2762 WARN("BAD_SIGN_OFF",
2763 "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline);
2764 }
2765 if (!defined $lines[$linenr]) {
2766 WARN("BAD_SIGN_OFF",
2767 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline);
2768 } elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) {
2769 WARN("BAD_SIGN_OFF",
2770 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
2771 } elsif ($1 ne $email) {
2772 WARN("BAD_SIGN_OFF",
2773 "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]);
2774 }
2775 }
2776 }
2777
2778# Check email subject for common tools that don't need to be mentioned
2779 if ($in_header_lines &&
2780 $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) {
2781 WARN("EMAIL_SUBJECT",
2782 "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
2783 }
2784
2785# Check for Gerrit Change-Ids not in any patch context
2786 if ($realfile eq '' && !$has_patch_separator && $line =~ /^\s*change-id:/i) {
2787 ERROR("GERRIT_CHANGE_ID",
2788 "Remove Gerrit Change-Id's before submitting upstream\n" . $herecurr);
2789 }
2790
2791# Check if the commit log is in a possible stack dump
2792 if ($in_commit_log && !$commit_log_possible_stack_dump &&
2793 ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
2794 $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
2795 # timestamp
2796 $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/) ||
2797 $line =~ /^(?:\s+\w+:\s+[0-9a-fA-F]+){3,3}/ ||
2798 $line =~ /^\s*\#\d+\s*\[[0-9a-fA-F]+\]\s*\w+ at [0-9a-fA-F]+/) {
2799 # stack dump address styles
2800 $commit_log_possible_stack_dump = 1;
2801 }
2802
2803# Check for line lengths > 75 in commit log, warn once
2804 if ($in_commit_log && !$commit_log_long_line &&
2805 length($line) > 75 &&
2806 !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
2807 # file delta changes
2808 $line =~ /^\s*(?:[\w\.\-]+\/)++[\w\.\-]+:/ ||
2809 # filename then :
2810 $line =~ /^\s*(?:Fixes:|Link:)/i ||
2811 # A Fixes: or Link: line
2812 $commit_log_possible_stack_dump)) {
2813 WARN("COMMIT_LOG_LONG_LINE",
2814 "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
2815 $commit_log_long_line = 1;
2816 }
2817
2818# Reset possible stack dump if a blank line is found
2819 if ($in_commit_log && $commit_log_possible_stack_dump &&
2820 $line =~ /^\s*$/) {
2821 $commit_log_possible_stack_dump = 0;
2822 }
2823
2824# Check for git id commit length and improperly formed commit descriptions
2825 if ($in_commit_log && !$commit_log_possible_stack_dump &&
2826 $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink|base-commit):/i &&
2827 $line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
2828 ($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
2829 ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
2830 $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i &&
2831 $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
2832 my $init_char = "c";
2833 my $orig_commit = "";
2834 my $short = 1;
2835 my $long = 0;
2836 my $case = 1;
2837 my $space = 1;
2838 my $hasdesc = 0;
2839 my $hasparens = 0;
2840 my $id = '0123456789ab';
2841 my $orig_desc = "commit description";
2842 my $description = "";
2843
2844 if ($line =~ /\b(c)ommit\s+([0-9a-f]{5,})\b/i) {
2845 $init_char = $1;
2846 $orig_commit = lc($2);
2847 } elsif ($line =~ /\b([0-9a-f]{12,40})\b/i) {
2848 $orig_commit = lc($1);
2849 }
2850
2851 $short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i);
2852 $long = 1 if ($line =~ /\bcommit\s+[0-9a-f]{41,}/i);
2853 $space = 0 if ($line =~ /\bcommit [0-9a-f]/i);
2854 $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/);
2855 if ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)"\)/i) {
2856 $orig_desc = $1;
2857 $hasparens = 1;
2858 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s*$/i &&
2859 defined $rawlines[$linenr] &&
2860 $rawlines[$linenr] =~ /^\s*\("([^"]+)"\)/) {
2861 $orig_desc = $1;
2862 $hasparens = 1;
2863 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("[^"]+$/i &&
2864 defined $rawlines[$linenr] &&
2865 $rawlines[$linenr] =~ /^\s*[^"]+"\)/) {
2866 $line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)$/i;
2867 $orig_desc = $1;
2868 $rawlines[$linenr] =~ /^\s*([^"]+)"\)/;
2869 $orig_desc .= " " . $1;
2870 $hasparens = 1;
2871 }
2872
2873 ($id, $description) = git_commit_info($orig_commit,
2874 $id, $orig_desc);
2875
2876 if (defined($id) &&
2877 ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens)) {
2878 ERROR("GIT_COMMIT_ID",
2879 "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herecurr);
2880 }
2881 }
2882
2883# Check for added, moved or deleted files
2884 if (!$reported_maintainer_file && !$in_commit_log &&
2885 ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
2886 $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
2887 ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
2888 (defined($1) || defined($2))))) {
2889 $is_patch = 1;
2890 $reported_maintainer_file = 1;
2891 WARN("FILE_PATH_CHANGES",
2892 "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);
2893 }
2894
2895# Check for adding new DT bindings not in schema format
2896 if (!$in_commit_log &&
2897 ($line =~ /^new file mode\s*\d+\s*$/) &&
2898 ($realfile =~ m@^Documentation/devicetree/bindings/.*\.txt$@)) {
2899 WARN("DT_SCHEMA_BINDING_PATCH",
2900 "DT bindings should be in DT schema format. See: Documentation/devicetree/writing-schema.rst\n");
2901 }
2902
2903# Check for wrappage within a valid hunk of the file
2904 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
2905 ERROR("CORRUPTED_PATCH",
2906 "patch seems to be corrupt (line wrapped?)\n" .
2907 $herecurr) if (!$emitted_corrupt++);
2908 }
2909
2910# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
2911 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
2912 $rawline !~ m/^$UTF8*$/) {
2913 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
2914
2915 my $blank = copy_spacing($rawline);
2916 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
2917 my $hereptr = "$hereline$ptr\n";
2918
2919 CHK("INVALID_UTF8",
2920 "Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
2921 }
2922
2923# Check if it's the start of a commit log
2924# (not a header line and we haven't seen the patch filename)
2925 if ($in_header_lines && $realfile =~ /^$/ &&
2926 !($rawline =~ /^\s+(?:\S|$)/ ||
2927 $rawline =~ /^(?:commit\b|from\b|[\w-]+:)/i)) {
2928 $in_header_lines = 0;
2929 $in_commit_log = 1;
2930 $has_commit_log = 1;
2931 }
2932
2933# Check if there is UTF-8 in a commit log when a mail header has explicitly
2934# declined it, i.e defined some charset where it is missing.
2935 if ($in_header_lines &&
2936 $rawline =~ /^Content-Type:.+charset="(.+)".*$/ &&
2937 $1 !~ /utf-8/i) {
2938 $non_utf8_charset = 1;
2939 }
2940
2941 if ($in_commit_log && $non_utf8_charset && $realfile =~ /^$/ &&
2942 $rawline =~ /$NON_ASCII_UTF8/) {
2943 WARN("UTF8_BEFORE_PATCH",
2944 "8-bit UTF-8 used in possible commit log\n" . $herecurr);
2945 }
2946
2947# Check for absolute kernel paths in commit message
2948 if ($tree && $in_commit_log) {
2949 while ($line =~ m{(?:^|\s)(/\S*)}g) {
2950 my $file = $1;
2951
2952 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
2953 check_absolute_file($1, $herecurr)) {
2954 #
2955 } else {
2956 check_absolute_file($file, $herecurr);
2957 }
2958 }
2959 }
2960
2961# Check for various typo / spelling mistakes
2962 if (defined($misspellings) &&
2963 ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
2964 while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) {
2965 my $typo = $1;
2966 my $typo_fix = $spelling_fix{lc($typo)};
2967 $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
2968 $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
2969 my $msg_level = \&WARN;
2970 $msg_level = \&CHK if ($file);
2971 if (&{$msg_level}("TYPO_SPELLING",
2972 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
2973 $fix) {
2974 $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
2975 }
2976 }
2977 }
2978
2979# check for invalid commit id
2980 if ($in_commit_log && $line =~ /(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) {
2981 my $id;
2982 my $description;
2983 ($id, $description) = git_commit_info($2, undef, undef);
2984 if (!defined($id)) {
2985 WARN("UNKNOWN_COMMIT_ID",
2986 "Unknown commit id '$2', maybe rebased or not pulled?\n" . $herecurr);
2987 }
2988 }
2989
2990# ignore non-hunk lines and lines being removed
2991 next if (!$hunk_line || $line =~ /^-/);
2992
2993#trailing whitespace
2994 if ($line =~ /^\+.*\015/) {
2995 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2996 if (ERROR("DOS_LINE_ENDINGS",
2997 "DOS line endings\n" . $herevet) &&
2998 $fix) {
2999 $fixed[$fixlinenr] =~ s/[\s\015]+$//;
3000 }
3001 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
3002 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3003 if (ERROR("TRAILING_WHITESPACE",
3004 "trailing whitespace\n" . $herevet) &&
3005 $fix) {
3006 $fixed[$fixlinenr] =~ s/\s+$//;
3007 }
3008
3009 $rpt_cleaners = 1;
3010 }
3011
3012# Check for FSF mailing addresses.
3013 if ($rawline =~ /\bwrite to the Free/i ||
3014 $rawline =~ /\b675\s+Mass\s+Ave/i ||
3015 $rawline =~ /\b59\s+Temple\s+Pl/i ||
3016 $rawline =~ /\b51\s+Franklin\s+St/i) {
3017 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3018 my $msg_level = \&ERROR;
3019 $msg_level = \&CHK if ($file);
3020 &{$msg_level}("FSF_MAILING_ADDRESS",
3021 "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
3022 }
3023
3024# check for Kconfig help text having a real description
3025# Only applies when adding the entry originally, after that we do not have
3026# sufficient context to determine whether it is indeed long enough.
3027 if ($realfile =~ /Kconfig/ &&
3028 # 'choice' is usually the last thing on the line (though
3029 # Kconfig supports named choices), so use a word boundary
3030 # (\b) rather than a whitespace character (\s)
3031 $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) {
3032 my $length = 0;
3033 my $cnt = $realcnt;
3034 my $ln = $linenr + 1;
3035 my $f;
3036 my $is_start = 0;
3037 my $is_end = 0;
3038 for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) {
3039 $f = $lines[$ln - 1];
3040 $cnt-- if ($lines[$ln - 1] !~ /^-/);
3041 $is_end = $lines[$ln - 1] =~ /^\+/;
3042
3043 next if ($f =~ /^-/);
3044 last if (!$file && $f =~ /^\@\@/);
3045
3046 if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) {
3047 $is_start = 1;
3048 } elsif ($lines[$ln - 1] =~ /^\+\s*(?:---)?help(?:---)?$/) {
3049 $length = -1;
3050 }
3051
3052 $f =~ s/^.//;
3053 $f =~ s/#.*//;
3054 $f =~ s/^\s+//;
3055 next if ($f =~ /^$/);
3056
3057 # This only checks context lines in the patch
3058 # and so hopefully shouldn't trigger false
3059 # positives, even though some of these are
3060 # common words in help texts
3061 if ($f =~ /^\s*(?:config|menuconfig|choice|endchoice|
3062 if|endif|menu|endmenu|source)\b/x) {
3063 $is_end = 1;
3064 last;
3065 }
3066 $length++;
3067 }
3068 if ($is_start && $is_end && $length < $min_conf_desc_length) {
3069 WARN("CONFIG_DESCRIPTION",
3070 "please write a paragraph that describes the config symbol fully\n" . $herecurr);
3071 }
3072 #print "is_start<$is_start> is_end<$is_end> length<$length>\n";
3073 }
3074
3075# check MAINTAINERS entries
3076 if ($realfile =~ /^MAINTAINERS$/) {
3077# check MAINTAINERS entries for the right form
3078 if ($rawline =~ /^\+[A-Z]:/ &&
3079 $rawline !~ /^\+[A-Z]:\t\S/) {
3080 if (WARN("MAINTAINERS_STYLE",
3081 "MAINTAINERS entries use one tab after TYPE:\n" . $herecurr) &&
3082 $fix) {
3083 $fixed[$fixlinenr] =~ s/^(\+[A-Z]):\s*/$1:\t/;
3084 }
3085 }
3086# check MAINTAINERS entries for the right ordering too
3087 my $preferred_order = 'MRLSWQBCPTFXNK';
3088 if ($rawline =~ /^\+[A-Z]:/ &&
3089 $prevrawline =~ /^[\+ ][A-Z]:/) {
3090 $rawline =~ /^\+([A-Z]):\s*(.*)/;
3091 my $cur = $1;
3092 my $curval = $2;
3093 $prevrawline =~ /^[\+ ]([A-Z]):\s*(.*)/;
3094 my $prev = $1;
3095 my $prevval = $2;
3096 my $curindex = index($preferred_order, $cur);
3097 my $previndex = index($preferred_order, $prev);
3098 if ($curindex < 0) {
3099 WARN("MAINTAINERS_STYLE",
3100 "Unknown MAINTAINERS entry type: '$cur'\n" . $herecurr);
3101 } else {
3102 if ($previndex >= 0 && $curindex < $previndex) {
3103 WARN("MAINTAINERS_STYLE",
3104 "Misordered MAINTAINERS entry - list '$cur:' before '$prev:'\n" . $hereprev);
3105 } elsif ((($prev eq 'F' && $cur eq 'F') ||
3106 ($prev eq 'X' && $cur eq 'X')) &&
3107 ($prevval cmp $curval) > 0) {
3108 WARN("MAINTAINERS_STYLE",
3109 "Misordered MAINTAINERS entry - list file patterns in alphabetic order\n" . $hereprev);
3110 }
3111 }
3112 }
3113 }
3114
3115# discourage the use of boolean for type definition attributes of Kconfig options
3116 if ($realfile =~ /Kconfig/ &&
3117 $line =~ /^\+\s*\bboolean\b/) {
3118 WARN("CONFIG_TYPE_BOOLEAN",
3119 "Use of boolean is deprecated, please use bool instead.\n" . $herecurr);
3120 }
3121
3122 if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
3123 ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
3124 my $flag = $1;
3125 my $replacement = {
3126 'EXTRA_AFLAGS' => 'asflags-y',
3127 'EXTRA_CFLAGS' => 'ccflags-y',
3128 'EXTRA_CPPFLAGS' => 'cppflags-y',
3129 'EXTRA_LDFLAGS' => 'ldflags-y',
3130 };
3131
3132 WARN("DEPRECATED_VARIABLE",
3133 "Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
3134 }
3135
3136# check for DT compatible documentation
3137 if (defined $root &&
3138 (($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
3139 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) {
3140
3141 my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
3142
3143 my $dt_path = $root . "/Documentation/devicetree/bindings/";
3144 my $vp_file = $dt_path . "vendor-prefixes.yaml";
3145
3146 foreach my $compat (@compats) {
3147 my $compat2 = $compat;
3148 $compat2 =~ s/\,[a-zA-Z0-9]*\-/\,<\.\*>\-/;
3149 my $compat3 = $compat;
3150 $compat3 =~ s/\,([a-z]*)[0-9]*\-/\,$1<\.\*>\-/;
3151 `grep -Erq "$compat|$compat2|$compat3" $dt_path`;
3152 if ( $? >> 8 ) {
3153 WARN("UNDOCUMENTED_DT_STRING",
3154 "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
3155 }
3156
3157 next if $compat !~ /^([a-zA-Z0-9\-]+)\,/;
3158 my $vendor = $1;
3159 `grep -Eq "\\"\\^\Q$vendor\E,\\.\\*\\":" $vp_file`;
3160 if ( $? >> 8 ) {
3161 WARN("UNDOCUMENTED_DT_STRING",
3162 "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr);
3163 }
3164 }
3165 }
3166
3167# check for using SPDX license tag at beginning of files
3168 if ($realline == $checklicenseline) {
3169 if ($rawline =~ /^[ \+]\s*\#\!\s*\//) {
3170 $checklicenseline = 2;
3171 } elsif ($rawline =~ /^\+/) {
3172 my $comment = "";
3173 if ($realfile =~ /\.(h|s|S)$/) {
3174 $comment = '/*';
3175 } elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
3176 $comment = '//';
3177 } elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
3178 $comment = '#';
3179 } elsif ($realfile =~ /\.rst$/) {
3180 $comment = '..';
3181 }
3182
3183# check SPDX comment style for .[chsS] files
3184 if ($realfile =~ /\.[chsS]$/ &&
3185 $rawline =~ /SPDX-License-Identifier:/ &&
3186 $rawline !~ m@^\+\s*\Q$comment\E\s*@) {
3187 WARN("SPDX_LICENSE_TAG",
3188 "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr);
3189 }
3190
3191 if ($comment !~ /^$/ &&
3192 $rawline !~ m@^\+\Q$comment\E SPDX-License-Identifier: @) {
3193 WARN("SPDX_LICENSE_TAG",
3194 "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr);
3195 } elsif ($rawline =~ /(SPDX-License-Identifier: .*)/) {
3196 my $spdx_license = $1;
3197 if (!is_SPDX_License_valid($spdx_license)) {
3198 WARN("SPDX_LICENSE_TAG",
3199 "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr);
3200 }
3201 if ($realfile =~ m@^Documentation/devicetree/bindings/@ &&
3202 not $spdx_license =~ /GPL-2\.0.*BSD-2-Clause/) {
3203 my $msg_level = \&WARN;
3204 $msg_level = \&CHK if ($file);
3205 if (&{$msg_level}("SPDX_LICENSE_TAG",
3206
3207 "DT binding documents should be licensed (GPL-2.0-only OR BSD-2-Clause)\n" . $herecurr) &&
3208 $fix) {
3209 $fixed[$fixlinenr] =~ s/SPDX-License-Identifier: .*/SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)/;
3210 }
3211 }
3212 }
3213 }
3214 }
3215
3216# check we are in a valid source file if not then ignore this hunk
3217 next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
3218
3219# check for using SPDX-License-Identifier on the wrong line number
3220 if ($realline != $checklicenseline &&
3221 $rawline =~ /\bSPDX-License-Identifier:/ &&
3222 substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) {
3223 WARN("SPDX_LICENSE_TAG",
3224 "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr);
3225 }
3226
3227# line length limit (with some exclusions)
3228#
3229# There are a few types of lines that may extend beyond $max_line_length:
3230# logging functions like pr_info that end in a string
3231# lines with a single string
3232# #defines that are a single string
3233# lines with an RFC3986 like URL
3234#
3235# There are 3 different line length message types:
3236# LONG_LINE_COMMENT a comment starts before but extends beyond $max_line_length
3237# LONG_LINE_STRING a string starts before but extends beyond $max_line_length
3238# LONG_LINE all other lines longer than $max_line_length
3239#
3240# if LONG_LINE is ignored, the other 2 types are also ignored
3241#
3242
3243 if ($line =~ /^\+/ && $length > $max_line_length) {
3244 my $msg_type = "LONG_LINE";
3245
3246 # Check the allowed long line types first
3247
3248 # logging functions that end in a string that starts
3249 # before $max_line_length
3250 if ($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(?:KERN_\S+\s*|[^"]*))?($String\s*(?:|,|\)\s*;)\s*)$/ &&
3251 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3252 $msg_type = "";
3253
3254 # lines with only strings (w/ possible termination)
3255 # #defines with only strings
3256 } elsif ($line =~ /^\+\s*$String\s*(?:\s*|,|\)\s*;)\s*$/ ||
3257 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) {
3258 $msg_type = "";
3259
3260 # More special cases
3261 } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/ ||
3262 $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) {
3263 $msg_type = "";
3264
3265 # URL ($rawline is used in case the URL is in a comment)
3266 } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) {
3267 $msg_type = "";
3268
3269 # Otherwise set the alternate message types
3270
3271 # a comment starts before $max_line_length
3272 } elsif ($line =~ /($;[\s$;]*)$/ &&
3273 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3274 $msg_type = "LONG_LINE_COMMENT"
3275
3276 # a quoted string starts before $max_line_length
3277 } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))?)$/ &&
3278 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
3279 $msg_type = "LONG_LINE_STRING"
3280 }
3281
3282 if ($msg_type ne "" &&
3283 (show_type("LONG_LINE") || show_type($msg_type))) {
3284 my $msg_level = \&WARN;
3285 $msg_level = \&CHK if ($file);
3286 &{$msg_level}($msg_type,
3287 "line length of $length exceeds $max_line_length columns\n" . $herecurr);
3288 }
3289 }
3290
3291# check for adding lines without a newline.
3292 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
3293 WARN("MISSING_EOF_NEWLINE",
3294 "adding a line without newline at end of file\n" . $herecurr);
3295 }
3296
3297# check we are in a valid source file C or perl if not then ignore this hunk
3298 next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
3299
3300# at the beginning of a line any tabs must come first and anything
3301# more than $tabsize must use tabs.
3302 if ($rawline =~ /^\+\s* \t\s*\S/ ||
3303 $rawline =~ /^\+\s* \s*/) {
3304 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3305 $rpt_cleaners = 1;
3306 if (ERROR("CODE_INDENT",
3307 "code indent should use tabs where possible\n" . $herevet) &&
3308 $fix) {
3309 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
3310 }
3311 }
3312
3313# check for repeated words separated by a single space
3314 if ($rawline =~ /^\+/) {
3315 while ($rawline =~ /\b($word_pattern) (?=($word_pattern))/g) {
3316
3317 my $first = $1;
3318 my $second = $2;
3319
3320 if ($first =~ /(?:struct|union|enum)/) {
3321 pos($rawline) += length($first) + length($second) + 1;
3322 next;
3323 }
3324
3325 next if ($first ne $second);
3326 next if ($first eq 'long');
3327
3328 if (WARN("REPEATED_WORD",
3329 "Possible repeated word: '$first'\n" . $herecurr) &&
3330 $fix) {
3331 $fixed[$fixlinenr] =~ s/\b$first $second\b/$first/;
3332 }
3333 }
3334
3335 # if it's a repeated word on consecutive lines in a comment block
3336 if ($prevline =~ /$;+\s*$/ &&
3337 $prevrawline =~ /($word_pattern)\s*$/) {
3338 my $last_word = $1;
3339 if ($rawline =~ /^\+\s*\*\s*$last_word /) {
3340 if (WARN("REPEATED_WORD",
3341 "Possible repeated word: '$last_word'\n" . $hereprev) &&
3342 $fix) {
3343 $fixed[$fixlinenr] =~ s/(\+\s*\*\s*)$last_word /$1/;
3344 }
3345 }
3346 }
3347 }
3348
3349# check for space before tabs.
3350 if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
3351 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3352 if (WARN("SPACE_BEFORE_TAB",
3353 "please, no space before tabs\n" . $herevet) &&
3354 $fix) {
3355 while ($fixed[$fixlinenr] =~
3356 s/(^\+.*) {$tabsize,$tabsize}\t/$1\t\t/) {}
3357 while ($fixed[$fixlinenr] =~
3358 s/(^\+.*) +\t/$1\t/) {}
3359 }
3360 }
3361
3362# check for assignments on the start of a line
3363 if ($sline =~ /^\+\s+($Assignment)[^=]/) {
3364 CHK("ASSIGNMENT_CONTINUATIONS",
3365 "Assignment operator '$1' should be on the previous line\n" . $hereprev);
3366 }
3367
3368# check for && or || at the start of a line
3369 if ($rawline =~ /^\+\s*(&&|\|\|)/) {
3370 CHK("LOGICAL_CONTINUATIONS",
3371 "Logical continuations should be on the previous line\n" . $hereprev);
3372 }
3373
3374# check indentation starts on a tab stop
3375 if ($perl_version_ok &&
3376 $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
3377 my $indent = length($1);
3378 if ($indent % $tabsize) {
3379 if (WARN("TABSTOP",
3380 "Statements should start on a tabstop\n" . $herecurr) &&
3381 $fix) {
3382 $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/$tabsize)@e;
3383 }
3384 }
3385 }
3386
3387# check multi-line statement indentation matches previous line
3388 if ($perl_version_ok &&
3389 $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
3390 $prevline =~ /^\+(\t*)(.*)$/;
3391 my $oldindent = $1;
3392 my $rest = $2;
3393
3394 my $pos = pos_last_openparen($rest);
3395 if ($pos >= 0) {
3396 $line =~ /^(\+| )([ \t]*)/;
3397 my $newindent = $2;
3398
3399 my $goodtabindent = $oldindent .
3400 "\t" x ($pos / $tabsize) .
3401 " " x ($pos % $tabsize);
3402 my $goodspaceindent = $oldindent . " " x $pos;
3403
3404 if ($newindent ne $goodtabindent &&
3405 $newindent ne $goodspaceindent) {
3406
3407 if (CHK("PARENTHESIS_ALIGNMENT",
3408 "Alignment should match open parenthesis\n" . $hereprev) &&
3409 $fix && $line =~ /^\+/) {
3410 $fixed[$fixlinenr] =~
3411 s/^\+[ \t]*/\+$goodtabindent/;
3412 }
3413 }
3414 }
3415 }
3416
3417# check for space after cast like "(int) foo" or "(struct foo) bar"
3418# avoid checking a few false positives:
3419# "sizeof(<type>)" or "__alignof__(<type>)"
3420# function pointer declarations like "(*foo)(int) = bar;"
3421# structure definitions like "(struct foo) { 0 };"
3422# multiline macros that define functions
3423# known attributes or the __attribute__ keyword
3424 if ($line =~ /^\+(.*)\(\s*$Type\s*\)([ \t]++)((?![={]|\\$|$Attribute|__attribute__))/ &&
3425 (!defined($1) || $1 !~ /\b(?:sizeof|__alignof__)\s*$/)) {
3426 if (CHK("SPACING",
3427 "No space is necessary after a cast\n" . $herecurr) &&
3428 $fix) {
3429 $fixed[$fixlinenr] =~
3430 s/(\(\s*$Type\s*\))[ \t]+/$1/;
3431 }
3432 }
3433
3434# Block comment styles
3435# Networking with an initial /*
3436 if ($realfile =~ m@^(drivers/net/|net/)@ &&
3437 $prevrawline =~ /^\+[ \t]*\/\*[ \t]*$/ &&
3438 $rawline =~ /^\+[ \t]*\*/ &&
3439 $realline > 2) {
3440 WARN("NETWORKING_BLOCK_COMMENT_STYLE",
3441 "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev);
3442 }
3443
3444# Block comments use * on subsequent lines
3445 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3446 $prevrawline =~ /^\+.*?\/\*/ && #starting /*
3447 $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */
3448 $rawline =~ /^\+/ && #line is new
3449 $rawline !~ /^\+[ \t]*\*/) { #no leading *
3450 WARN("BLOCK_COMMENT_STYLE",
3451 "Block comments use * on subsequent lines\n" . $hereprev);
3452 }
3453
3454# Block comments use */ on trailing lines
3455 if ($rawline !~ m@^\+[ \t]*\*/[ \t]*$@ && #trailing */
3456 $rawline !~ m@^\+.*/\*.*\*/[ \t]*$@ && #inline /*...*/
3457 $rawline !~ m@^\+.*\*{2,}/[ \t]*$@ && #trailing **/
3458 $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */
3459 WARN("BLOCK_COMMENT_STYLE",
3460 "Block comments use a trailing */ on a separate line\n" . $herecurr);
3461 }
3462
3463# Block comment * alignment
3464 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3465 $line =~ /^\+[ \t]*$;/ && #leading comment
3466 $rawline =~ /^\+[ \t]*\*/ && #leading *
3467 (($prevrawline =~ /^\+.*?\/\*/ && #leading /*
3468 $prevrawline !~ /\*\/[ \t]*$/) || #no trailing */
3469 $prevrawline =~ /^\+[ \t]*\*/)) { #leading *
3470 my $oldindent;
3471 $prevrawline =~ m@^\+([ \t]*/?)\*@;
3472 if (defined($1)) {
3473 $oldindent = expand_tabs($1);
3474 } else {
3475 $prevrawline =~ m@^\+(.*/?)\*@;
3476 $oldindent = expand_tabs($1);
3477 }
3478 $rawline =~ m@^\+([ \t]*)\*@;
3479 my $newindent = $1;
3480 $newindent = expand_tabs($newindent);
3481 if (length($oldindent) ne length($newindent)) {
3482 WARN("BLOCK_COMMENT_STYLE",
3483 "Block comments should align the * on each line\n" . $hereprev);
3484 }
3485 }
3486
3487# check for missing blank lines after struct/union declarations
3488# with exceptions for various attributes and macros
3489 if ($prevline =~ /^[\+ ]};?\s*$/ &&
3490 $line =~ /^\+/ &&
3491 !($line =~ /^\+\s*$/ ||
3492 $line =~ /^\+\s*EXPORT_SYMBOL/ ||
3493 $line =~ /^\+\s*MODULE_/i ||
3494 $line =~ /^\+\s*\#\s*(?:end|elif|else)/ ||
3495 $line =~ /^\+[a-z_]*init/ ||
3496 $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
3497 $line =~ /^\+\s*DECLARE/ ||
3498 $line =~ /^\+\s*builtin_[\w_]*driver/ ||
3499 $line =~ /^\+\s*__setup/)) {
3500 if (CHK("LINE_SPACING",
3501 "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) &&
3502 $fix) {
3503 fix_insert_line($fixlinenr, "\+");
3504 }
3505 }
3506
3507# check for multiple consecutive blank lines
3508 if ($prevline =~ /^[\+ ]\s*$/ &&
3509 $line =~ /^\+\s*$/ &&
3510 $last_blank_line != ($linenr - 1)) {
3511 if (CHK("LINE_SPACING",
3512 "Please don't use multiple blank lines\n" . $hereprev) &&
3513 $fix) {
3514 fix_delete_line($fixlinenr, $rawline);
3515 }
3516
3517 $last_blank_line = $linenr;
3518 }
3519
3520# check for missing blank lines after declarations
3521 if ($sline =~ /^\+\s+\S/ && #Not at char 1
3522 # actual declarations
3523 ($prevline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
3524 # function pointer declarations
3525 $prevline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
3526 # foo bar; where foo is some local typedef or #define
3527 $prevline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
3528 # known declaration macros
3529 $prevline =~ /^\+\s+$declaration_macros/) &&
3530 # for "else if" which can look like "$Ident $Ident"
3531 !($prevline =~ /^\+\s+$c90_Keywords\b/ ||
3532 # other possible extensions of declaration lines
3533 $prevline =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
3534 # not starting a section or a macro "\" extended line
3535 $prevline =~ /(?:\{\s*|\\)$/) &&
3536 # looks like a declaration
3537 !($sline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
3538 # function pointer declarations
3539 $sline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
3540 # foo bar; where foo is some local typedef or #define
3541 $sline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
3542 # known declaration macros
3543 $sline =~ /^\+\s+$declaration_macros/ ||
3544 # start of struct or union or enum
3545 $sline =~ /^\+\s+(?:static\s+)?(?:const\s+)?(?:union|struct|enum|typedef)\b/ ||
3546 # start or end of block or continuation of declaration
3547 $sline =~ /^\+\s+(?:$|[\{\}\.\#\"\?\:\(\[])/ ||
3548 # bitfield continuation
3549 $sline =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
3550 # other possible extensions of declaration lines
3551 $sline =~ /^\+\s+\(?\s*(?:$Compare|$Assignment|$Operators)/) &&
3552 # indentation of previous and current line are the same
3553 (($prevline =~ /\+(\s+)\S/) && $sline =~ /^\+$1\S/)) {
3554 if (WARN("LINE_SPACING",
3555 "Missing a blank line after declarations\n" . $hereprev) &&
3556 $fix) {
3557 fix_insert_line($fixlinenr, "\+");
3558 }
3559 }
3560
3561# check for spaces at the beginning of a line.
3562# Exceptions:
3563# 1) within comments
3564# 2) indented preprocessor commands
3565# 3) hanging labels
3566 if ($rawline =~ /^\+ / && $line !~ /^\+ *(?:$;|#|$Ident:)/) {
3567 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3568 if (WARN("LEADING_SPACE",
3569 "please, no spaces at the start of a line\n" . $herevet) &&
3570 $fix) {
3571 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
3572 }
3573 }
3574
3575# check we are in a valid C source file if not then ignore this hunk
3576 next if ($realfile !~ /\.(h|c)$/);
3577
3578# check for unusual line ending [ or (
3579 if ($line =~ /^\+.*([\[\(])\s*$/) {
3580 CHK("OPEN_ENDED_LINE",
3581 "Lines should not end with a '$1'\n" . $herecurr);
3582 }
3583
3584# check if this appears to be the start function declaration, save the name
3585 if ($sline =~ /^\+\{\s*$/ &&
3586 $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) {
3587 $context_function = $1;
3588 }
3589
3590# check if this appears to be the end of function declaration
3591 if ($sline =~ /^\+\}\s*$/) {
3592 undef $context_function;
3593 }
3594
3595# check indentation of any line with a bare else
3596# (but not if it is a multiple line "if (foo) return bar; else return baz;")
3597# if the previous line is a break or return and is indented 1 tab more...
3598 if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
3599 my $tabs = length($1) + 1;
3600 if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
3601 ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
3602 defined $lines[$linenr] &&
3603 $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
3604 WARN("UNNECESSARY_ELSE",
3605 "else is not generally useful after a break or return\n" . $hereprev);
3606 }
3607 }
3608
3609# check indentation of a line with a break;
3610# if the previous line is a goto or return and is indented the same # of tabs
3611 if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
3612 my $tabs = $1;
3613 if ($prevline =~ /^\+$tabs(?:goto|return)\b/) {
3614 WARN("UNNECESSARY_BREAK",
3615 "break is not useful after a goto or return\n" . $hereprev);
3616 }
3617 }
3618
3619# check for RCS/CVS revision markers
3620 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
3621 WARN("CVS_KEYWORD",
3622 "CVS style keyword markers, these will _not_ be updated\n". $herecurr);
3623 }
3624
3625# check for old HOTPLUG __dev<foo> section markings
3626 if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) {
3627 WARN("HOTPLUG_SECTION",
3628 "Using $1 is unnecessary\n" . $herecurr);
3629 }
3630
3631# Check for potential 'bare' types
3632 my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
3633 $realline_next);
3634#print "LINE<$line>\n";
3635 if ($linenr > $suppress_statement &&
3636 $realcnt && $sline =~ /.\s*\S/) {
3637 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
3638 ctx_statement_block($linenr, $realcnt, 0);
3639 $stat =~ s/\n./\n /g;
3640 $cond =~ s/\n./\n /g;
3641
3642#print "linenr<$linenr> <$stat>\n";
3643 # If this statement has no statement boundaries within
3644 # it there is no point in retrying a statement scan
3645 # until we hit end of it.
3646 my $frag = $stat; $frag =~ s/;+\s*$//;
3647 if ($frag !~ /(?:{|;)/) {
3648#print "skip<$line_nr_next>\n";
3649 $suppress_statement = $line_nr_next;
3650 }
3651
3652 # Find the real next line.
3653 $realline_next = $line_nr_next;
3654 if (defined $realline_next &&
3655 (!defined $lines[$realline_next - 1] ||
3656 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
3657 $realline_next++;
3658 }
3659
3660 my $s = $stat;
3661 $s =~ s/{.*$//s;
3662
3663 # Ignore goto labels.
3664 if ($s =~ /$Ident:\*$/s) {
3665
3666 # Ignore functions being called
3667 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
3668
3669 } elsif ($s =~ /^.\s*else\b/s) {
3670
3671 # declarations always start with types
3672 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
3673 my $type = $1;
3674 $type =~ s/\s+/ /g;
3675 possible($type, "A:" . $s);
3676
3677 # definitions in global scope can only start with types
3678 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
3679 possible($1, "B:" . $s);
3680 }
3681
3682 # any (foo ... *) is a pointer cast, and foo is a type
3683 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
3684 possible($1, "C:" . $s);
3685 }
3686
3687 # Check for any sort of function declaration.
3688 # int foo(something bar, other baz);
3689 # void (*store_gdt)(x86_descr_ptr *);
3690 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
3691 my ($name_len) = length($1);
3692
3693 my $ctx = $s;
3694 substr($ctx, 0, $name_len + 1, '');
3695 $ctx =~ s/\)[^\)]*$//;
3696
3697 for my $arg (split(/\s*,\s*/, $ctx)) {
3698 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
3699
3700 possible($1, "D:" . $s);
3701 }
3702 }
3703 }
3704
3705 }
3706
3707#
3708# Checks which may be anchored in the context.
3709#
3710
3711# Check for switch () and associated case and default
3712# statements should be at the same indent.
3713 if ($line=~/\bswitch\s*\(.*\)/) {
3714 my $err = '';
3715 my $sep = '';
3716 my @ctx = ctx_block_outer($linenr, $realcnt);
3717 shift(@ctx);
3718 for my $ctx (@ctx) {
3719 my ($clen, $cindent) = line_stats($ctx);
3720 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
3721 $indent != $cindent) {
3722 $err .= "$sep$ctx\n";
3723 $sep = '';
3724 } else {
3725 $sep = "[...]\n";
3726 }
3727 }
3728 if ($err ne '') {
3729 ERROR("SWITCH_CASE_INDENT_LEVEL",
3730 "switch and case should be at the same indent\n$hereline$err");
3731 }
3732 }
3733
3734# if/while/etc brace do not go on next line, unless defining a do while loop,
3735# or if that brace on the next line is for something else
3736 if ($line =~ /(.*)\b((?:if|while|for|switch|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
3737 my $pre_ctx = "$1$2";
3738
3739 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
3740
3741 if ($line =~ /^\+\t{6,}/) {
3742 WARN("DEEP_INDENTATION",
3743 "Too many leading tabs - consider code refactoring\n" . $herecurr);
3744 }
3745
3746 my $ctx_cnt = $realcnt - $#ctx - 1;
3747 my $ctx = join("\n", @ctx);
3748
3749 my $ctx_ln = $linenr;
3750 my $ctx_skip = $realcnt;
3751
3752 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
3753 defined $lines[$ctx_ln - 1] &&
3754 $lines[$ctx_ln - 1] =~ /^-/)) {
3755 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
3756 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
3757 $ctx_ln++;
3758 }
3759
3760 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
3761 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
3762
3763 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
3764 ERROR("OPEN_BRACE",
3765 "that open brace { should be on the previous line\n" .
3766 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
3767 }
3768 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
3769 $ctx =~ /\)\s*\;\s*$/ &&
3770 defined $lines[$ctx_ln - 1])
3771 {
3772 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
3773 if ($nindent > $indent) {
3774 WARN("TRAILING_SEMICOLON",
3775 "trailing semicolon indicates no statements, indent implies otherwise\n" .
3776 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
3777 }
3778 }
3779 }
3780
3781# Check relative indent for conditionals and blocks.
3782 if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|(?:do|else)\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
3783 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
3784 ctx_statement_block($linenr, $realcnt, 0)
3785 if (!defined $stat);
3786 my ($s, $c) = ($stat, $cond);
3787
3788 substr($s, 0, length($c), '');
3789
3790 # remove inline comments
3791 $s =~ s/$;/ /g;
3792 $c =~ s/$;/ /g;
3793
3794 # Find out how long the conditional actually is.
3795 my @newlines = ($c =~ /\n/gs);
3796 my $cond_lines = 1 + $#newlines;
3797
3798 # Make sure we remove the line prefixes as we have
3799 # none on the first line, and are going to readd them
3800 # where necessary.
3801 $s =~ s/\n./\n/gs;
3802 while ($s =~ /\n\s+\\\n/) {
3803 $cond_lines += $s =~ s/\n\s+\\\n/\n/g;
3804 }
3805
3806 # We want to check the first line inside the block
3807 # starting at the end of the conditional, so remove:
3808 # 1) any blank line termination
3809 # 2) any opening brace { on end of the line
3810 # 3) any do (...) {
3811 my $continuation = 0;
3812 my $check = 0;
3813 $s =~ s/^.*\bdo\b//;
3814 $s =~ s/^\s*{//;
3815 if ($s =~ s/^\s*\\//) {
3816 $continuation = 1;
3817 }
3818 if ($s =~ s/^\s*?\n//) {
3819 $check = 1;
3820 $cond_lines++;
3821 }
3822
3823 # Also ignore a loop construct at the end of a
3824 # preprocessor statement.
3825 if (($prevline =~ /^.\s*#\s*define\s/ ||
3826 $prevline =~ /\\\s*$/) && $continuation == 0) {
3827 $check = 0;
3828 }
3829
3830 my $cond_ptr = -1;
3831 $continuation = 0;
3832 while ($cond_ptr != $cond_lines) {
3833 $cond_ptr = $cond_lines;
3834
3835 # If we see an #else/#elif then the code
3836 # is not linear.
3837 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
3838 $check = 0;
3839 }
3840
3841 # Ignore:
3842 # 1) blank lines, they should be at 0,
3843 # 2) preprocessor lines, and
3844 # 3) labels.
3845 if ($continuation ||
3846 $s =~ /^\s*?\n/ ||
3847 $s =~ /^\s*#\s*?/ ||
3848 $s =~ /^\s*$Ident\s*:/) {
3849 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
3850 if ($s =~ s/^.*?\n//) {
3851 $cond_lines++;
3852 }
3853 }
3854 }
3855
3856 my (undef, $sindent) = line_stats("+" . $s);
3857 my $stat_real = raw_line($linenr, $cond_lines);
3858
3859 # Check if either of these lines are modified, else
3860 # this is not this patch's fault.
3861 if (!defined($stat_real) ||
3862 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
3863 $check = 0;
3864 }
3865 if (defined($stat_real) && $cond_lines > 1) {
3866 $stat_real = "[...]\n$stat_real";
3867 }
3868
3869 #print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
3870
3871 if ($check && $s ne '' &&
3872 (($sindent % $tabsize) != 0 ||
3873 ($sindent < $indent) ||
3874 ($sindent == $indent &&
3875 ($s !~ /^\s*(?:\}|\{|else\b)/)) ||
3876 ($sindent > $indent + $tabsize))) {
3877 WARN("SUSPECT_CODE_INDENT",
3878 "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
3879 }
3880 }
3881
3882 # Track the 'values' across context and added lines.
3883 my $opline = $line; $opline =~ s/^./ /;
3884 my ($curr_values, $curr_vars) =
3885 annotate_values($opline . "\n", $prev_values);
3886 $curr_values = $prev_values . $curr_values;
3887 if ($dbg_values) {
3888 my $outline = $opline; $outline =~ s/\t/ /g;
3889 print "$linenr > .$outline\n";
3890 print "$linenr > $curr_values\n";
3891 print "$linenr > $curr_vars\n";
3892 }
3893 $prev_values = substr($curr_values, -1);
3894
3895#ignore lines not being added
3896 next if ($line =~ /^[^\+]/);
3897
3898# check for dereferences that span multiple lines
3899 if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ &&
3900 $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) {
3901 $prevline =~ /($Lval\s*(?:\.|->))\s*$/;
3902 my $ref = $1;
3903 $line =~ /^.\s*($Lval)/;
3904 $ref .= $1;
3905 $ref =~ s/\s//g;
3906 WARN("MULTILINE_DEREFERENCE",
3907 "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev);
3908 }
3909
3910# check for declarations of signed or unsigned without int
3911 while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) {
3912 my $type = $1;
3913 my $var = $2;
3914 $var = "" if (!defined $var);
3915 if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) {
3916 my $sign = $1;
3917 my $pointer = $2;
3918
3919 $pointer = "" if (!defined $pointer);
3920
3921 if (WARN("UNSPECIFIED_INT",
3922 "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) &&
3923 $fix) {
3924 my $decl = trim($sign) . " int ";
3925 my $comp_pointer = $pointer;
3926 $comp_pointer =~ s/\s//g;
3927 $decl .= $comp_pointer;
3928 $decl = rtrim($decl) if ($var eq "");
3929 $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@;
3930 }
3931 }
3932 }
3933
3934# TEST: allow direct testing of the type matcher.
3935 if ($dbg_type) {
3936 if ($line =~ /^.\s*$Declare\s*$/) {
3937 ERROR("TEST_TYPE",
3938 "TEST: is type\n" . $herecurr);
3939 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
3940 ERROR("TEST_NOT_TYPE",
3941 "TEST: is not type ($1 is)\n". $herecurr);
3942 }
3943 next;
3944 }
3945# TEST: allow direct testing of the attribute matcher.
3946 if ($dbg_attr) {
3947 if ($line =~ /^.\s*$Modifier\s*$/) {
3948 ERROR("TEST_ATTR",
3949 "TEST: is attr\n" . $herecurr);
3950 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
3951 ERROR("TEST_NOT_ATTR",
3952 "TEST: is not attr ($1 is)\n". $herecurr);
3953 }
3954 next;
3955 }
3956
3957# check for initialisation to aggregates open brace on the next line
3958 if ($line =~ /^.\s*{/ &&
3959 $prevline =~ /(?:^|[^=])=\s*$/) {
3960 if (ERROR("OPEN_BRACE",
3961 "that open brace { should be on the previous line\n" . $hereprev) &&
3962 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
3963 fix_delete_line($fixlinenr - 1, $prevrawline);
3964 fix_delete_line($fixlinenr, $rawline);
3965 my $fixedline = $prevrawline;
3966 $fixedline =~ s/\s*=\s*$/ = {/;
3967 fix_insert_line($fixlinenr, $fixedline);
3968 $fixedline = $line;
3969 $fixedline =~ s/^(.\s*)\{\s*/$1/;
3970 fix_insert_line($fixlinenr, $fixedline);
3971 }
3972 }
3973
3974#
3975# Checks which are anchored on the added line.
3976#
3977
3978# check for malformed paths in #include statements (uses RAW line)
3979 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
3980 my $path = $1;
3981 if ($path =~ m{//}) {
3982 ERROR("MALFORMED_INCLUDE",
3983 "malformed #include filename\n" . $herecurr);
3984 }
3985 if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
3986 ERROR("UAPI_INCLUDE",
3987 "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
3988 }
3989 }
3990
3991# no C99 // comments
3992 if ($line =~ m{//}) {
3993 if (ERROR("C99_COMMENTS",
3994 "do not use C99 // comments\n" . $herecurr) &&
3995 $fix) {
3996 my $line = $fixed[$fixlinenr];
3997 if ($line =~ /\/\/(.*)$/) {
3998 my $comment = trim($1);
3999 $fixed[$fixlinenr] =~ s@\/\/(.*)$@/\* $comment \*/@;
4000 }
4001 }
4002 }
4003 # Remove C99 comments.
4004 $line =~ s@//.*@@;
4005 $opline =~ s@//.*@@;
4006
4007# EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
4008# the whole statement.
4009#print "APW <$lines[$realline_next - 1]>\n";
4010 if (defined $realline_next &&
4011 exists $lines[$realline_next - 1] &&
4012 !defined $suppress_export{$realline_next} &&
4013 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
4014 $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
4015 # Handle definitions which produce identifiers with
4016 # a prefix:
4017 # XXX(foo);
4018 # EXPORT_SYMBOL(something_foo);
4019 my $name = $1;
4020 if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
4021 $name =~ /^${Ident}_$2/) {
4022#print "FOO C name<$name>\n";
4023 $suppress_export{$realline_next} = 1;
4024
4025 } elsif ($stat !~ /(?:
4026 \n.}\s*$|
4027 ^.DEFINE_$Ident\(\Q$name\E\)|
4028 ^.DECLARE_$Ident\(\Q$name\E\)|
4029 ^.LIST_HEAD\(\Q$name\E\)|
4030 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
4031 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
4032 )/x) {
4033#print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
4034 $suppress_export{$realline_next} = 2;
4035 } else {
4036 $suppress_export{$realline_next} = 1;
4037 }
4038 }
4039 if (!defined $suppress_export{$linenr} &&
4040 $prevline =~ /^.\s*$/ &&
4041 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
4042 $line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
4043#print "FOO B <$lines[$linenr - 1]>\n";
4044 $suppress_export{$linenr} = 2;
4045 }
4046 if (defined $suppress_export{$linenr} &&
4047 $suppress_export{$linenr} == 2) {
4048 WARN("EXPORT_SYMBOL",
4049 "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
4050 }
4051
4052# check for global initialisers.
4053 if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) {
4054 if (ERROR("GLOBAL_INITIALISERS",
4055 "do not initialise globals to $1\n" . $herecurr) &&
4056 $fix) {
4057 $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/;
4058 }
4059 }
4060# check for static initialisers.
4061 if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) {
4062 if (ERROR("INITIALISED_STATIC",
4063 "do not initialise statics to $1\n" .
4064 $herecurr) &&
4065 $fix) {
4066 $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/;
4067 }
4068 }
4069
4070# check for misordered declarations of char/short/int/long with signed/unsigned
4071 while ($sline =~ m{(\b$TypeMisordered\b)}g) {
4072 my $tmp = trim($1);
4073 WARN("MISORDERED_TYPE",
4074 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr);
4075 }
4076
4077# check for unnecessary <signed> int declarations of short/long/long long
4078 while ($sline =~ m{\b($TypeMisordered(\s*\*)*|$C90_int_types)\b}g) {
4079 my $type = trim($1);
4080 next if ($type !~ /\bint\b/);
4081 next if ($type !~ /\b(?:short|long\s+long|long)\b/);
4082 my $new_type = $type;
4083 $new_type =~ s/\b\s*int\s*\b/ /;
4084 $new_type =~ s/\b\s*(?:un)?signed\b\s*/ /;
4085 $new_type =~ s/^const\s+//;
4086 $new_type = "unsigned $new_type" if ($type =~ /\bunsigned\b/);
4087 $new_type = "const $new_type" if ($type =~ /^const\b/);
4088 $new_type =~ s/\s+/ /g;
4089 $new_type = trim($new_type);
4090 if (WARN("UNNECESSARY_INT",
4091 "Prefer '$new_type' over '$type' as the int is unnecessary\n" . $herecurr) &&
4092 $fix) {
4093 $fixed[$fixlinenr] =~ s/\b\Q$type\E\b/$new_type/;
4094 }
4095 }
4096
4097# check for static const char * arrays.
4098 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
4099 WARN("STATIC_CONST_CHAR_ARRAY",
4100 "static const char * array should probably be static const char * const\n" .
4101 $herecurr);
4102 }
4103
4104# check for initialized const char arrays that should be static const
4105 if ($line =~ /^\+\s*const\s+(char|unsigned\s+char|_*u8|(?:[us]_)?int8_t)\s+\w+\s*\[\s*(?:\w+\s*)?\]\s*=\s*"/) {
4106 if (WARN("STATIC_CONST_CHAR_ARRAY",
4107 "const array should probably be static const\n" . $herecurr) &&
4108 $fix) {
4109 $fixed[$fixlinenr] =~ s/(^.\s*)const\b/${1}static const/;
4110 }
4111 }
4112
4113# check for static char foo[] = "bar" declarations.
4114 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
4115 WARN("STATIC_CONST_CHAR_ARRAY",
4116 "static char array declaration should probably be static const char\n" .
4117 $herecurr);
4118 }
4119
4120# check for const <foo> const where <foo> is not a pointer or array type
4121 if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) {
4122 my $found = $1;
4123 if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) {
4124 WARN("CONST_CONST",
4125 "'const $found const *' should probably be 'const $found * const'\n" . $herecurr);
4126 } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) {
4127 WARN("CONST_CONST",
4128 "'const $found const' should probably be 'const $found'\n" . $herecurr);
4129 }
4130 }
4131
4132# check for non-global char *foo[] = {"bar", ...} declarations.
4133 if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) {
4134 WARN("STATIC_CONST_CHAR_ARRAY",
4135 "char * array declaration might be better as static const\n" .
4136 $herecurr);
4137 }
4138
4139# check for sizeof(foo)/sizeof(foo[0]) that could be ARRAY_SIZE(foo)
4140 if ($line =~ m@\bsizeof\s*\(\s*($Lval)\s*\)@) {
4141 my $array = $1;
4142 if ($line =~ m@\b(sizeof\s*\(\s*\Q$array\E\s*\)\s*/\s*sizeof\s*\(\s*\Q$array\E\s*\[\s*0\s*\]\s*\))@) {
4143 my $array_div = $1;
4144 if (WARN("ARRAY_SIZE",
4145 "Prefer ARRAY_SIZE($array)\n" . $herecurr) &&
4146 $fix) {
4147 $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/;
4148 }
4149 }
4150 }
4151
4152# check for function declarations without arguments like "int foo()"
4153 if ($line =~ /(\b$Type\s*$Ident)\s*\(\s*\)/) {
4154 if (ERROR("FUNCTION_WITHOUT_ARGS",
4155 "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
4156 $fix) {
4157 $fixed[$fixlinenr] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/;
4158 }
4159 }
4160
4161# check for new typedefs, only function parameters and sparse annotations
4162# make sense.
4163 if ($line =~ /\btypedef\s/ &&
4164 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
4165 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
4166 $line !~ /\b$typeTypedefs\b/ &&
4167 $line !~ /\b__bitwise\b/) {
4168 WARN("NEW_TYPEDEFS",
4169 "do not add new typedefs\n" . $herecurr);
4170 }
4171
4172# * goes on variable not on type
4173 # (char*[ const])
4174 while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
4175 #print "AA<$1>\n";
4176 my ($ident, $from, $to) = ($1, $2, $2);
4177
4178 # Should start with a space.
4179 $to =~ s/^(\S)/ $1/;
4180 # Should not end with a space.
4181 $to =~ s/\s+$//;
4182 # '*'s should not have spaces between.
4183 while ($to =~ s/\*\s+\*/\*\*/) {
4184 }
4185
4186## print "1: from<$from> to<$to> ident<$ident>\n";
4187 if ($from ne $to) {
4188 if (ERROR("POINTER_LOCATION",
4189 "\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr) &&
4190 $fix) {
4191 my $sub_from = $ident;
4192 my $sub_to = $ident;
4193 $sub_to =~ s/\Q$from\E/$to/;
4194 $fixed[$fixlinenr] =~
4195 s@\Q$sub_from\E@$sub_to@;
4196 }
4197 }
4198 }
4199 while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
4200 #print "BB<$1>\n";
4201 my ($match, $from, $to, $ident) = ($1, $2, $2, $3);
4202
4203 # Should start with a space.
4204 $to =~ s/^(\S)/ $1/;
4205 # Should not end with a space.
4206 $to =~ s/\s+$//;
4207 # '*'s should not have spaces between.
4208 while ($to =~ s/\*\s+\*/\*\*/) {
4209 }
4210 # Modifiers should have spaces.
4211 $to =~ s/(\b$Modifier$)/$1 /;
4212
4213## print "2: from<$from> to<$to> ident<$ident>\n";
4214 if ($from ne $to && $ident !~ /^$Modifier$/) {
4215 if (ERROR("POINTER_LOCATION",
4216 "\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr) &&
4217 $fix) {
4218
4219 my $sub_from = $match;
4220 my $sub_to = $match;
4221 $sub_to =~ s/\Q$from\E/$to/;
4222 $fixed[$fixlinenr] =~
4223 s@\Q$sub_from\E@$sub_to@;
4224 }
4225 }
4226 }
4227
4228# avoid BUG() or BUG_ON()
4229 if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
4230 my $msg_level = \&WARN;
4231 $msg_level = \&CHK if ($file);
4232 &{$msg_level}("AVOID_BUG",
4233 "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
4234 }
4235
4236# avoid LINUX_VERSION_CODE
4237 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
4238 WARN("LINUX_VERSION_CODE",
4239 "LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
4240 }
4241
4242# check for uses of printk_ratelimit
4243 if ($line =~ /\bprintk_ratelimit\s*\(/) {
4244 WARN("PRINTK_RATELIMITED",
4245 "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
4246 }
4247
4248# printk should use KERN_* levels
4249 if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) {
4250 WARN("PRINTK_WITHOUT_KERN_LEVEL",
4251 "printk() should include KERN_<LEVEL> facility level\n" . $herecurr);
4252 }
4253
4254 if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
4255 my $orig = $1;
4256 my $level = lc($orig);
4257 $level = "warn" if ($level eq "warning");
4258 my $level2 = $level;
4259 $level2 = "dbg" if ($level eq "debug");
4260 WARN("PREFER_PR_LEVEL",
4261 "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to printk(KERN_$orig ...\n" . $herecurr);
4262 }
4263
4264 if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
4265 my $orig = $1;
4266 my $level = lc($orig);
4267 $level = "warn" if ($level eq "warning");
4268 $level = "dbg" if ($level eq "debug");
4269 WARN("PREFER_DEV_LEVEL",
4270 "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
4271 }
4272
4273# ENOSYS means "bad syscall nr" and nothing else. This will have a small
4274# number of false positives, but assembly files are not checked, so at
4275# least the arch entry code will not trigger this warning.
4276 if ($line =~ /\bENOSYS\b/) {
4277 WARN("ENOSYS",
4278 "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr);
4279 }
4280
4281# ENOTSUPP is not a standard error code and should be avoided in new patches.
4282# Folks usually mean EOPNOTSUPP (also called ENOTSUP), when they type ENOTSUPP.
4283# Similarly to ENOSYS warning a small number of false positives is expected.
4284 if (!$file && $line =~ /\bENOTSUPP\b/) {
4285 if (WARN("ENOTSUPP",
4286 "ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP\n" . $herecurr) &&
4287 $fix) {
4288 $fixed[$fixlinenr] =~ s/\bENOTSUPP\b/EOPNOTSUPP/;
4289 }
4290 }
4291
4292# function brace can't be on same line, except for #defines of do while,
4293# or if closed on same line
4294 if ($perl_version_ok &&
4295 $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ &&
4296 $sline !~ /\#\s*define\b.*do\s*\{/ &&
4297 $sline !~ /}/) {
4298 if (ERROR("OPEN_BRACE",
4299 "open brace '{' following function definitions go on the next line\n" . $herecurr) &&
4300 $fix) {
4301 fix_delete_line($fixlinenr, $rawline);
4302 my $fixed_line = $rawline;
4303 $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(.*)$/;
4304 my $line1 = $1;
4305 my $line2 = $2;
4306 fix_insert_line($fixlinenr, ltrim($line1));
4307 fix_insert_line($fixlinenr, "\+{");
4308 if ($line2 !~ /^\s*$/) {
4309 fix_insert_line($fixlinenr, "\+\t" . trim($line2));
4310 }
4311 }
4312 }
4313
4314# open braces for enum, union and struct go on the same line.
4315 if ($line =~ /^.\s*{/ &&
4316 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
4317 if (ERROR("OPEN_BRACE",
4318 "open brace '{' following $1 go on the same line\n" . $hereprev) &&
4319 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4320 fix_delete_line($fixlinenr - 1, $prevrawline);
4321 fix_delete_line($fixlinenr, $rawline);
4322 my $fixedline = rtrim($prevrawline) . " {";
4323 fix_insert_line($fixlinenr, $fixedline);
4324 $fixedline = $rawline;
4325 $fixedline =~ s/^(.\s*)\{\s*/$1\t/;
4326 if ($fixedline !~ /^\+\s*$/) {
4327 fix_insert_line($fixlinenr, $fixedline);
4328 }
4329 }
4330 }
4331
4332# missing space after union, struct or enum definition
4333 if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident){1,2}[=\{]/) {
4334 if (WARN("SPACING",
4335 "missing space after $1 definition\n" . $herecurr) &&
4336 $fix) {
4337 $fixed[$fixlinenr] =~
4338 s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(?:\s+$Ident){1,2})([=\{])/$1 $2/;
4339 }
4340 }
4341
4342# Function pointer declarations
4343# check spacing between type, funcptr, and args
4344# canonical declaration is "type (*funcptr)(args...)"
4345 if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) {
4346 my $declare = $1;
4347 my $pre_pointer_space = $2;
4348 my $post_pointer_space = $3;
4349 my $funcname = $4;
4350 my $post_funcname_space = $5;
4351 my $pre_args_space = $6;
4352
4353# the $Declare variable will capture all spaces after the type
4354# so check it for a missing trailing missing space but pointer return types
4355# don't need a space so don't warn for those.
4356 my $post_declare_space = "";
4357 if ($declare =~ /(\s+)$/) {
4358 $post_declare_space = $1;
4359 $declare = rtrim($declare);
4360 }
4361 if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) {
4362 WARN("SPACING",
4363 "missing space after return type\n" . $herecurr);
4364 $post_declare_space = " ";
4365 }
4366
4367# unnecessary space "type (*funcptr)(args...)"
4368# This test is not currently implemented because these declarations are
4369# equivalent to
4370# int foo(int bar, ...)
4371# and this is form shouldn't/doesn't generate a checkpatch warning.
4372#
4373# elsif ($declare =~ /\s{2,}$/) {
4374# WARN("SPACING",
4375# "Multiple spaces after return type\n" . $herecurr);
4376# }
4377
4378# unnecessary space "type ( *funcptr)(args...)"
4379 if (defined $pre_pointer_space &&
4380 $pre_pointer_space =~ /^\s/) {
4381 WARN("SPACING",
4382 "Unnecessary space after function pointer open parenthesis\n" . $herecurr);
4383 }
4384
4385# unnecessary space "type (* funcptr)(args...)"
4386 if (defined $post_pointer_space &&
4387 $post_pointer_space =~ /^\s/) {
4388 WARN("SPACING",
4389 "Unnecessary space before function pointer name\n" . $herecurr);
4390 }
4391
4392# unnecessary space "type (*funcptr )(args...)"
4393 if (defined $post_funcname_space &&
4394 $post_funcname_space =~ /^\s/) {
4395 WARN("SPACING",
4396 "Unnecessary space after function pointer name\n" . $herecurr);
4397 }
4398
4399# unnecessary space "type (*funcptr) (args...)"
4400 if (defined $pre_args_space &&
4401 $pre_args_space =~ /^\s/) {
4402 WARN("SPACING",
4403 "Unnecessary space before function pointer arguments\n" . $herecurr);
4404 }
4405
4406 if (show_type("SPACING") && $fix) {
4407 $fixed[$fixlinenr] =~
4408 s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
4409 }
4410 }
4411
4412# check for spacing round square brackets; allowed:
4413# 1. with a type on the left -- int [] a;
4414# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
4415# 3. inside a curly brace -- = { [0...10] = 5 }
4416 while ($line =~ /(.*?\s)\[/g) {
4417 my ($where, $prefix) = ($-[1], $1);
4418 if ($prefix !~ /$Type\s+$/ &&
4419 ($where != 0 || $prefix !~ /^.\s+$/) &&
4420 $prefix !~ /[{,:]\s+$/) {
4421 if (ERROR("BRACKET_SPACE",
4422 "space prohibited before open square bracket '['\n" . $herecurr) &&
4423 $fix) {
4424 $fixed[$fixlinenr] =~
4425 s/^(\+.*?)\s+\[/$1\[/;
4426 }
4427 }
4428 }
4429
4430# check for spaces between functions and their parentheses.
4431 while ($line =~ /($Ident)\s+\(/g) {
4432 my $name = $1;
4433 my $ctx_before = substr($line, 0, $-[1]);
4434 my $ctx = "$ctx_before$name";
4435
4436 # Ignore those directives where spaces _are_ permitted.
4437 if ($name =~ /^(?:
4438 if|for|while|switch|return|case|
4439 volatile|__volatile__|
4440 __attribute__|format|__extension__|
4441 asm|__asm__)$/x)
4442 {
4443 # cpp #define statements have non-optional spaces, ie
4444 # if there is a space between the name and the open
4445 # parenthesis it is simply not a parameter group.
4446 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
4447
4448 # cpp #elif statement condition may start with a (
4449 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
4450
4451 # If this whole things ends with a type its most
4452 # likely a typedef for a function.
4453 } elsif ($ctx =~ /$Type$/) {
4454
4455 } else {
4456 if (WARN("SPACING",
4457 "space prohibited between function name and open parenthesis '('\n" . $herecurr) &&
4458 $fix) {
4459 $fixed[$fixlinenr] =~
4460 s/\b$name\s+\(/$name\(/;
4461 }
4462 }
4463 }
4464
4465# Check operator spacing.
4466 if (!($line=~/\#\s*include/)) {
4467 my $fixed_line = "";
4468 my $line_fixed = 0;
4469
4470 my $ops = qr{
4471 <<=|>>=|<=|>=|==|!=|
4472 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
4473 =>|->|<<|>>|<|>|=|!|~|
4474 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
4475 \?:|\?|:
4476 }x;
4477 my @elements = split(/($ops|;)/, $opline);
4478
4479## print("element count: <" . $#elements . ">\n");
4480## foreach my $el (@elements) {
4481## print("el: <$el>\n");
4482## }
4483
4484 my @fix_elements = ();
4485 my $off = 0;
4486
4487 foreach my $el (@elements) {
4488 push(@fix_elements, substr($rawline, $off, length($el)));
4489 $off += length($el);
4490 }
4491
4492 $off = 0;
4493
4494 my $blank = copy_spacing($opline);
4495 my $last_after = -1;
4496
4497 for (my $n = 0; $n < $#elements; $n += 2) {
4498
4499 my $good = $fix_elements[$n] . $fix_elements[$n + 1];
4500
4501## print("n: <$n> good: <$good>\n");
4502
4503 $off += length($elements[$n]);
4504
4505 # Pick up the preceding and succeeding characters.
4506 my $ca = substr($opline, 0, $off);
4507 my $cc = '';
4508 if (length($opline) >= ($off + length($elements[$n + 1]))) {
4509 $cc = substr($opline, $off + length($elements[$n + 1]));
4510 }
4511 my $cb = "$ca$;$cc";
4512
4513 my $a = '';
4514 $a = 'V' if ($elements[$n] ne '');
4515 $a = 'W' if ($elements[$n] =~ /\s$/);
4516 $a = 'C' if ($elements[$n] =~ /$;$/);
4517 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
4518 $a = 'O' if ($elements[$n] eq '');
4519 $a = 'E' if ($ca =~ /^\s*$/);
4520
4521 my $op = $elements[$n + 1];
4522
4523 my $c = '';
4524 if (defined $elements[$n + 2]) {
4525 $c = 'V' if ($elements[$n + 2] ne '');
4526 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
4527 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
4528 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
4529 $c = 'O' if ($elements[$n + 2] eq '');
4530 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
4531 } else {
4532 $c = 'E';
4533 }
4534
4535 my $ctx = "${a}x${c}";
4536
4537 my $at = "(ctx:$ctx)";
4538
4539 my $ptr = substr($blank, 0, $off) . "^";
4540 my $hereptr = "$hereline$ptr\n";
4541
4542 # Pull out the value of this operator.
4543 my $op_type = substr($curr_values, $off + 1, 1);
4544
4545 # Get the full operator variant.
4546 my $opv = $op . substr($curr_vars, $off, 1);
4547
4548 # Ignore operators passed as parameters.
4549 if ($op_type ne 'V' &&
4550 $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) {
4551
4552# # Ignore comments
4553# } elsif ($op =~ /^$;+$/) {
4554
4555 # ; should have either the end of line or a space or \ after it
4556 } elsif ($op eq ';') {
4557 if ($ctx !~ /.x[WEBC]/ &&
4558 $cc !~ /^\\/ && $cc !~ /^;/) {
4559 if (ERROR("SPACING",
4560 "space required after that '$op' $at\n" . $hereptr)) {
4561 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
4562 $line_fixed = 1;
4563 }
4564 }
4565
4566 # // is a comment
4567 } elsif ($op eq '//') {
4568
4569 # : when part of a bitfield
4570 } elsif ($opv eq ':B') {
4571 # skip the bitfield test for now
4572
4573 # No spaces for:
4574 # ->
4575 } elsif ($op eq '->') {
4576 if ($ctx =~ /Wx.|.xW/) {
4577 if (ERROR("SPACING",
4578 "spaces prohibited around that '$op' $at\n" . $hereptr)) {
4579 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4580 if (defined $fix_elements[$n + 2]) {
4581 $fix_elements[$n + 2] =~ s/^\s+//;
4582 }
4583 $line_fixed = 1;
4584 }
4585 }
4586
4587 # , must not have a space before and must have a space on the right.
4588 } elsif ($op eq ',') {
4589 my $rtrim_before = 0;
4590 my $space_after = 0;
4591 if ($ctx =~ /Wx./) {
4592 if (ERROR("SPACING",
4593 "space prohibited before that '$op' $at\n" . $hereptr)) {
4594 $line_fixed = 1;
4595 $rtrim_before = 1;
4596 }
4597 }
4598 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
4599 if (ERROR("SPACING",
4600 "space required after that '$op' $at\n" . $hereptr)) {
4601 $line_fixed = 1;
4602 $last_after = $n;
4603 $space_after = 1;
4604 }
4605 }
4606 if ($rtrim_before || $space_after) {
4607 if ($rtrim_before) {
4608 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4609 } else {
4610 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
4611 }
4612 if ($space_after) {
4613 $good .= " ";
4614 }
4615 }
4616
4617 # '*' as part of a type definition -- reported already.
4618 } elsif ($opv eq '*_') {
4619 #warn "'*' is part of type\n";
4620
4621 # unary operators should have a space before and
4622 # none after. May be left adjacent to another
4623 # unary operator, or a cast
4624 } elsif ($op eq '!' || $op eq '~' ||
4625 $opv eq '*U' || $opv eq '-U' ||
4626 $opv eq '&U' || $opv eq '&&U') {
4627 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
4628 if (ERROR("SPACING",
4629 "space required before that '$op' $at\n" . $hereptr)) {
4630 if ($n != $last_after + 2) {
4631 $good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]);
4632 $line_fixed = 1;
4633 }
4634 }
4635 }
4636 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
4637 # A unary '*' may be const
4638
4639 } elsif ($ctx =~ /.xW/) {
4640 if (ERROR("SPACING",
4641 "space prohibited after that '$op' $at\n" . $hereptr)) {
4642 $good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]);
4643 if (defined $fix_elements[$n + 2]) {
4644 $fix_elements[$n + 2] =~ s/^\s+//;
4645 }
4646 $line_fixed = 1;
4647 }
4648 }
4649
4650 # unary ++ and unary -- are allowed no space on one side.
4651 } elsif ($op eq '++' or $op eq '--') {
4652 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
4653 if (ERROR("SPACING",
4654 "space required one side of that '$op' $at\n" . $hereptr)) {
4655 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
4656 $line_fixed = 1;
4657 }
4658 }
4659 if ($ctx =~ /Wx[BE]/ ||
4660 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
4661 if (ERROR("SPACING",
4662 "space prohibited before that '$op' $at\n" . $hereptr)) {
4663 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4664 $line_fixed = 1;
4665 }
4666 }
4667 if ($ctx =~ /ExW/) {
4668 if (ERROR("SPACING",
4669 "space prohibited after that '$op' $at\n" . $hereptr)) {
4670 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
4671 if (defined $fix_elements[$n + 2]) {
4672 $fix_elements[$n + 2] =~ s/^\s+//;
4673 }
4674 $line_fixed = 1;
4675 }
4676 }
4677
4678 # << and >> may either have or not have spaces both sides
4679 } elsif ($op eq '<<' or $op eq '>>' or
4680 $op eq '&' or $op eq '^' or $op eq '|' or
4681 $op eq '+' or $op eq '-' or
4682 $op eq '*' or $op eq '/' or
4683 $op eq '%')
4684 {
4685 if ($check) {
4686 if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
4687 if (CHK("SPACING",
4688 "spaces preferred around that '$op' $at\n" . $hereptr)) {
4689 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4690 $fix_elements[$n + 2] =~ s/^\s+//;
4691 $line_fixed = 1;
4692 }
4693 } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
4694 if (CHK("SPACING",
4695 "space preferred before that '$op' $at\n" . $hereptr)) {
4696 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
4697 $line_fixed = 1;
4698 }
4699 }
4700 } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
4701 if (ERROR("SPACING",
4702 "need consistent spacing around '$op' $at\n" . $hereptr)) {
4703 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4704 if (defined $fix_elements[$n + 2]) {
4705 $fix_elements[$n + 2] =~ s/^\s+//;
4706 }
4707 $line_fixed = 1;
4708 }
4709 }
4710
4711 # A colon needs no spaces before when it is
4712 # terminating a case value or a label.
4713 } elsif ($opv eq ':C' || $opv eq ':L') {
4714 if ($ctx =~ /Wx./) {
4715 if (ERROR("SPACING",
4716 "space prohibited before that '$op' $at\n" . $hereptr)) {
4717 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4718 $line_fixed = 1;
4719 }
4720 }
4721
4722 # All the others need spaces both sides.
4723 } elsif ($ctx !~ /[EWC]x[CWE]/) {
4724 my $ok = 0;
4725
4726 # Ignore email addresses <foo@bar>
4727 if (($op eq '<' &&
4728 $cc =~ /^\S+\@\S+>/) ||
4729 ($op eq '>' &&
4730 $ca =~ /<\S+\@\S+$/))
4731 {
4732 $ok = 1;
4733 }
4734
4735 # for asm volatile statements
4736 # ignore a colon with another
4737 # colon immediately before or after
4738 if (($op eq ':') &&
4739 ($ca =~ /:$/ || $cc =~ /^:/)) {
4740 $ok = 1;
4741 }
4742
4743 # messages are ERROR, but ?: are CHK
4744 if ($ok == 0) {
4745 my $msg_level = \&ERROR;
4746 $msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
4747
4748 if (&{$msg_level}("SPACING",
4749 "spaces required around that '$op' $at\n" . $hereptr)) {
4750 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4751 if (defined $fix_elements[$n + 2]) {
4752 $fix_elements[$n + 2] =~ s/^\s+//;
4753 }
4754 $line_fixed = 1;
4755 }
4756 }
4757 }
4758 $off += length($elements[$n + 1]);
4759
4760## print("n: <$n> GOOD: <$good>\n");
4761
4762 $fixed_line = $fixed_line . $good;
4763 }
4764
4765 if (($#elements % 2) == 0) {
4766 $fixed_line = $fixed_line . $fix_elements[$#elements];
4767 }
4768
4769 if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) {
4770 $fixed[$fixlinenr] = $fixed_line;
4771 }
4772
4773
4774 }
4775
4776# check for whitespace before a non-naked semicolon
4777 if ($line =~ /^\+.*\S\s+;\s*$/) {
4778 if (WARN("SPACING",
4779 "space prohibited before semicolon\n" . $herecurr) &&
4780 $fix) {
4781 1 while $fixed[$fixlinenr] =~
4782 s/^(\+.*\S)\s+;/$1;/;
4783 }
4784 }
4785
4786# check for multiple assignments
4787 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
4788 CHK("MULTIPLE_ASSIGNMENTS",
4789 "multiple assignments should be avoided\n" . $herecurr);
4790 }
4791
4792## # check for multiple declarations, allowing for a function declaration
4793## # continuation.
4794## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
4795## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
4796##
4797## # Remove any bracketed sections to ensure we do not
4798## # falsly report the parameters of functions.
4799## my $ln = $line;
4800## while ($ln =~ s/\([^\(\)]*\)//g) {
4801## }
4802## if ($ln =~ /,/) {
4803## WARN("MULTIPLE_DECLARATION",
4804## "declaring multiple variables together should be avoided\n" . $herecurr);
4805## }
4806## }
4807
4808#need space before brace following if, while, etc
4809 if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
4810 $line =~ /\b(?:else|do)\{/) {
4811 if (ERROR("SPACING",
4812 "space required before the open brace '{'\n" . $herecurr) &&
4813 $fix) {
4814 $fixed[$fixlinenr] =~ s/^(\+.*(?:do|else|\)))\{/$1 {/;
4815 }
4816 }
4817
4818## # check for blank lines before declarations
4819## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ &&
4820## $prevrawline =~ /^.\s*$/) {
4821## WARN("SPACING",
4822## "No blank lines before declarations\n" . $hereprev);
4823## }
4824##
4825
4826# closing brace should have a space following it when it has anything
4827# on the line
4828 if ($line =~ /}(?!(?:,|;|\)|\}))\S/) {
4829 if (ERROR("SPACING",
4830 "space required after that close brace '}'\n" . $herecurr) &&
4831 $fix) {
4832 $fixed[$fixlinenr] =~
4833 s/}((?!(?:,|;|\)))\S)/} $1/;
4834 }
4835 }
4836
4837# check spacing on square brackets
4838 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
4839 if (ERROR("SPACING",
4840 "space prohibited after that open square bracket '['\n" . $herecurr) &&
4841 $fix) {
4842 $fixed[$fixlinenr] =~
4843 s/\[\s+/\[/;
4844 }
4845 }
4846 if ($line =~ /\s\]/) {
4847 if (ERROR("SPACING",
4848 "space prohibited before that close square bracket ']'\n" . $herecurr) &&
4849 $fix) {
4850 $fixed[$fixlinenr] =~
4851 s/\s+\]/\]/;
4852 }
4853 }
4854
4855# check spacing on parentheses
4856 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
4857 $line !~ /for\s*\(\s+;/) {
4858 if (ERROR("SPACING",
4859 "space prohibited after that open parenthesis '('\n" . $herecurr) &&
4860 $fix) {
4861 $fixed[$fixlinenr] =~
4862 s/\(\s+/\(/;
4863 }
4864 }
4865 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
4866 $line !~ /for\s*\(.*;\s+\)/ &&
4867 $line !~ /:\s+\)/) {
4868 if (ERROR("SPACING",
4869 "space prohibited before that close parenthesis ')'\n" . $herecurr) &&
4870 $fix) {
4871 $fixed[$fixlinenr] =~
4872 s/\s+\)/\)/;
4873 }
4874 }
4875
4876# check unnecessary parentheses around addressof/dereference single $Lvals
4877# ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar
4878
4879 while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
4880 my $var = $1;
4881 if (CHK("UNNECESSARY_PARENTHESES",
4882 "Unnecessary parentheses around $var\n" . $herecurr) &&
4883 $fix) {
4884 $fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/;
4885 }
4886 }
4887
4888# check for unnecessary parentheses around function pointer uses
4889# ie: (foo->bar)(); should be foo->bar();
4890# but not "if (foo->bar) (" to avoid some false positives
4891 if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) {
4892 my $var = $2;
4893 if (CHK("UNNECESSARY_PARENTHESES",
4894 "Unnecessary parentheses around function pointer $var\n" . $herecurr) &&
4895 $fix) {
4896 my $var2 = deparenthesize($var);
4897 $var2 =~ s/\s//g;
4898 $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
4899 }
4900 }
4901
4902# check for unnecessary parentheses around comparisons in if uses
4903# when !drivers/staging or command-line uses --strict
4904 if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) &&
4905 $perl_version_ok && defined($stat) &&
4906 $stat =~ /(^.\s*if\s*($balanced_parens))/) {
4907 my $if_stat = $1;
4908 my $test = substr($2, 1, -1);
4909 my $herectx;
4910 while ($test =~ /(?:^|[^\w\&\!\~])+\s*\(\s*([\&\!\~]?\s*$Lval\s*(?:$Compare\s*$FuncArg)?)\s*\)/g) {
4911 my $match = $1;
4912 # avoid parentheses around potential macro args
4913 next if ($match =~ /^\s*\w+\s*$/);
4914 if (!defined($herectx)) {
4915 $herectx = $here . "\n";
4916 my $cnt = statement_rawlines($if_stat);
4917 for (my $n = 0; $n < $cnt; $n++) {
4918 my $rl = raw_line($linenr, $n);
4919 $herectx .= $rl . "\n";
4920 last if $rl =~ /^[ \+].*\{/;
4921 }
4922 }
4923 CHK("UNNECESSARY_PARENTHESES",
4924 "Unnecessary parentheses around '$match'\n" . $herectx);
4925 }
4926 }
4927
4928#goto labels aren't indented, allow a single space however
4929 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
4930 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
4931 if (WARN("INDENTED_LABEL",
4932 "labels should not be indented\n" . $herecurr) &&
4933 $fix) {
4934 $fixed[$fixlinenr] =~
4935 s/^(.)\s+/$1/;
4936 }
4937 }
4938
4939# return is not a function
4940 if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) {
4941 my $spacing = $1;
4942 if ($perl_version_ok &&
4943 $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) {
4944 my $value = $1;
4945 $value = deparenthesize($value);
4946 if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) {
4947 ERROR("RETURN_PARENTHESES",
4948 "return is not a function, parentheses are not required\n" . $herecurr);
4949 }
4950 } elsif ($spacing !~ /\s+/) {
4951 ERROR("SPACING",
4952 "space required before the open parenthesis '('\n" . $herecurr);
4953 }
4954 }
4955
4956# unnecessary return in a void function
4957# at end-of-function, with the previous line a single leading tab, then return;
4958# and the line before that not a goto label target like "out:"
4959 if ($sline =~ /^[ \+]}\s*$/ &&
4960 $prevline =~ /^\+\treturn\s*;\s*$/ &&
4961 $linenr >= 3 &&
4962 $lines[$linenr - 3] =~ /^[ +]/ &&
4963 $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
4964 WARN("RETURN_VOID",
4965 "void function return statements are not generally useful\n" . $hereprev);
4966 }
4967
4968# if statements using unnecessary parentheses - ie: if ((foo == bar))
4969 if ($perl_version_ok &&
4970 $line =~ /\bif\s*((?:\(\s*){2,})/) {
4971 my $openparens = $1;
4972 my $count = $openparens =~ tr@\(@\(@;
4973 my $msg = "";
4974 if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) {
4975 my $comp = $4; #Not $1 because of $LvalOrFunc
4976 $msg = " - maybe == should be = ?" if ($comp eq "==");
4977 WARN("UNNECESSARY_PARENTHESES",
4978 "Unnecessary parentheses$msg\n" . $herecurr);
4979 }
4980 }
4981
4982# comparisons with a constant or upper case identifier on the left
4983# avoid cases like "foo + BAR < baz"
4984# only fix matches surrounded by parentheses to avoid incorrect
4985# conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5"
4986 if ($perl_version_ok &&
4987 $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) {
4988 my $lead = $1;
4989 my $const = $2;
4990 my $comp = $3;
4991 my $to = $4;
4992 my $newcomp = $comp;
4993 if ($lead !~ /(?:$Operators|\.)\s*$/ &&
4994 $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
4995 WARN("CONSTANT_COMPARISON",
4996 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
4997 $fix) {
4998 if ($comp eq "<") {
4999 $newcomp = ">";
5000 } elsif ($comp eq "<=") {
5001 $newcomp = ">=";
5002 } elsif ($comp eq ">") {
5003 $newcomp = "<";
5004 } elsif ($comp eq ">=") {
5005 $newcomp = "<=";
5006 }
5007 $fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/;
5008 }
5009 }
5010
5011# Return of what appears to be an errno should normally be negative
5012 if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
5013 my $name = $1;
5014 if ($name ne 'EOF' && $name ne 'ERROR') {
5015 WARN("USE_NEGATIVE_ERRNO",
5016 "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
5017 }
5018 }
5019
5020# Need a space before open parenthesis after if, while etc
5021 if ($line =~ /\b(if|while|for|switch)\(/) {
5022 if (ERROR("SPACING",
5023 "space required before the open parenthesis '('\n" . $herecurr) &&
5024 $fix) {
5025 $fixed[$fixlinenr] =~
5026 s/\b(if|while|for|switch)\(/$1 \(/;
5027 }
5028 }
5029
5030# Check for illegal assignment in if conditional -- and check for trailing
5031# statements after the conditional.
5032 if ($line =~ /do\s*(?!{)/) {
5033 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
5034 ctx_statement_block($linenr, $realcnt, 0)
5035 if (!defined $stat);
5036 my ($stat_next) = ctx_statement_block($line_nr_next,
5037 $remain_next, $off_next);
5038 $stat_next =~ s/\n./\n /g;
5039 ##print "stat<$stat> stat_next<$stat_next>\n";
5040
5041 if ($stat_next =~ /^\s*while\b/) {
5042 # If the statement carries leading newlines,
5043 # then count those as offsets.
5044 my ($whitespace) =
5045 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
5046 my $offset =
5047 statement_rawlines($whitespace) - 1;
5048
5049 $suppress_whiletrailers{$line_nr_next +
5050 $offset} = 1;
5051 }
5052 }
5053 if (!defined $suppress_whiletrailers{$linenr} &&
5054 defined($stat) && defined($cond) &&
5055 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
5056 my ($s, $c) = ($stat, $cond);
5057
5058 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
5059 if (ERROR("ASSIGN_IN_IF",
5060 "do not use assignment in if condition\n" . $herecurr) &&
5061 $fix && $perl_version_ok) {
5062 if ($rawline =~ /^\+(\s+)if\s*\(\s*(\!)?\s*\(\s*(($Lval)\s*=\s*$LvalOrFunc)\s*\)\s*(?:($Compare)\s*($FuncArg))?\s*\)\s*(\{)?\s*$/) {
5063 my $space = $1;
5064 my $not = $2;
5065 my $statement = $3;
5066 my $assigned = $4;
5067 my $test = $8;
5068 my $against = $9;
5069 my $brace = $15;
5070 fix_delete_line($fixlinenr, $rawline);
5071 fix_insert_line($fixlinenr, "$space$statement;");
5072 my $newline = "${space}if (";
5073 $newline .= '!' if defined($not);
5074 $newline .= '(' if (defined $not && defined($test) && defined($against));
5075 $newline .= "$assigned";
5076 $newline .= " $test $against" if (defined($test) && defined($against));
5077 $newline .= ')' if (defined $not && defined($test) && defined($against));
5078 $newline .= ')';
5079 $newline .= " {" if (defined($brace));
5080 fix_insert_line($fixlinenr + 1, $newline);
5081 }
5082 }
5083 }
5084
5085 # Find out what is on the end of the line after the
5086 # conditional.
5087 substr($s, 0, length($c), '');
5088 $s =~ s/\n.*//g;
5089 $s =~ s/$;//g; # Remove any comments
5090 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
5091 $c !~ /}\s*while\s*/)
5092 {
5093 # Find out how long the conditional actually is.
5094 my @newlines = ($c =~ /\n/gs);
5095 my $cond_lines = 1 + $#newlines;
5096 my $stat_real = '';
5097
5098 $stat_real = raw_line($linenr, $cond_lines)
5099 . "\n" if ($cond_lines);
5100 if (defined($stat_real) && $cond_lines > 1) {
5101 $stat_real = "[...]\n$stat_real";
5102 }
5103
5104 ERROR("TRAILING_STATEMENTS",
5105 "trailing statements should be on next line\n" . $herecurr . $stat_real);
5106 }
5107 }
5108
5109# Check for bitwise tests written as boolean
5110 if ($line =~ /
5111 (?:
5112 (?:\[|\(|\&\&|\|\|)
5113 \s*0[xX][0-9]+\s*
5114 (?:\&\&|\|\|)
5115 |
5116 (?:\&\&|\|\|)
5117 \s*0[xX][0-9]+\s*
5118 (?:\&\&|\|\||\)|\])
5119 )/x)
5120 {
5121 WARN("HEXADECIMAL_BOOLEAN_TEST",
5122 "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
5123 }
5124
5125# if and else should not have general statements after it
5126 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
5127 my $s = $1;
5128 $s =~ s/$;//g; # Remove any comments
5129 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
5130 ERROR("TRAILING_STATEMENTS",
5131 "trailing statements should be on next line\n" . $herecurr);
5132 }
5133 }
5134# if should not continue a brace
5135 if ($line =~ /}\s*if\b/) {
5136 ERROR("TRAILING_STATEMENTS",
5137 "trailing statements should be on next line (or did you mean 'else if'?)\n" .
5138 $herecurr);
5139 }
5140# case and default should not have general statements after them
5141 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
5142 $line !~ /\G(?:
5143 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
5144 \s*return\s+
5145 )/xg)
5146 {
5147 ERROR("TRAILING_STATEMENTS",
5148 "trailing statements should be on next line\n" . $herecurr);
5149 }
5150
5151 # Check for }<nl>else {, these must be at the same
5152 # indent level to be relevant to each other.
5153 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ &&
5154 $previndent == $indent) {
5155 if (ERROR("ELSE_AFTER_BRACE",
5156 "else should follow close brace '}'\n" . $hereprev) &&
5157 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5158 fix_delete_line($fixlinenr - 1, $prevrawline);
5159 fix_delete_line($fixlinenr, $rawline);
5160 my $fixedline = $prevrawline;
5161 $fixedline =~ s/}\s*$//;
5162 if ($fixedline !~ /^\+\s*$/) {
5163 fix_insert_line($fixlinenr, $fixedline);
5164 }
5165 $fixedline = $rawline;
5166 $fixedline =~ s/^(.\s*)else/$1} else/;
5167 fix_insert_line($fixlinenr, $fixedline);
5168 }
5169 }
5170
5171 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ &&
5172 $previndent == $indent) {
5173 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
5174
5175 # Find out what is on the end of the line after the
5176 # conditional.
5177 substr($s, 0, length($c), '');
5178 $s =~ s/\n.*//g;
5179
5180 if ($s =~ /^\s*;/) {
5181 if (ERROR("WHILE_AFTER_BRACE",
5182 "while should follow close brace '}'\n" . $hereprev) &&
5183 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
5184 fix_delete_line($fixlinenr - 1, $prevrawline);
5185 fix_delete_line($fixlinenr, $rawline);
5186 my $fixedline = $prevrawline;
5187 my $trailing = $rawline;
5188 $trailing =~ s/^\+//;
5189 $trailing = trim($trailing);
5190 $fixedline =~ s/}\s*$/} $trailing/;
5191 fix_insert_line($fixlinenr, $fixedline);
5192 }
5193 }
5194 }
5195
5196#Specific variable tests
5197 while ($line =~ m{($Constant|$Lval)}g) {
5198 my $var = $1;
5199
5200#CamelCase
5201 if ($var !~ /^$Constant$/ &&
5202 $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
5203#Ignore Page<foo> variants
5204 $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
5205#Ignore SI style variants like nS, mV and dB
5206#(ie: max_uV, regulator_min_uA_show, RANGE_mA_VALUE)
5207 $var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
5208#Ignore some three character SI units explicitly, like MiB and KHz
5209 $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
5210 while ($var =~ m{($Ident)}g) {
5211 my $word = $1;
5212 next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
5213 if ($check) {
5214 seed_camelcase_includes();
5215 if (!$file && !$camelcase_file_seeded) {
5216 seed_camelcase_file($realfile);
5217 $camelcase_file_seeded = 1;
5218 }
5219 }
5220 if (!defined $camelcase{$word}) {
5221 $camelcase{$word} = 1;
5222 CHK("CAMELCASE",
5223 "Avoid CamelCase: <$word>\n" . $herecurr);
5224 }
5225 }
5226 }
5227 }
5228
5229#no spaces allowed after \ in define
5230 if ($line =~ /\#\s*define.*\\\s+$/) {
5231 if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
5232 "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
5233 $fix) {
5234 $fixed[$fixlinenr] =~ s/\s+$//;
5235 }
5236 }
5237
5238# warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
5239# itself <asm/foo.h> (uses RAW line)
5240 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
5241 my $file = "$1.h";
5242 my $checkfile = "include/linux/$file";
5243 if (-f "$root/$checkfile" &&
5244 $realfile ne $checkfile &&
5245 $1 !~ /$allowed_asm_includes/)
5246 {
5247 my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`;
5248 if ($asminclude > 0) {
5249 if ($realfile =~ m{^arch/}) {
5250 CHK("ARCH_INCLUDE_LINUX",
5251 "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5252 } else {
5253 WARN("INCLUDE_LINUX",
5254 "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
5255 }
5256 }
5257 }
5258 }
5259
5260# multi-statement macros should be enclosed in a do while loop, grab the
5261# first statement and ensure its the whole macro if its not enclosed
5262# in a known good container
5263 if ($realfile !~ m@/vmlinux.lds.h$@ &&
5264 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
5265 my $ln = $linenr;
5266 my $cnt = $realcnt;
5267 my ($off, $dstat, $dcond, $rest);
5268 my $ctx = '';
5269 my $has_flow_statement = 0;
5270 my $has_arg_concat = 0;
5271 ($dstat, $dcond, $ln, $cnt, $off) =
5272 ctx_statement_block($linenr, $realcnt, 0);
5273 $ctx = $dstat;
5274 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
5275 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
5276
5277 $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
5278 $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);
5279
5280 $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
5281 my $define_args = $1;
5282 my $define_stmt = $dstat;
5283 my @def_args = ();
5284
5285 if (defined $define_args && $define_args ne "") {
5286 $define_args = substr($define_args, 1, length($define_args) - 2);
5287 $define_args =~ s/\s*//g;
5288 $define_args =~ s/\\\+?//g;
5289 @def_args = split(",", $define_args);
5290 }
5291
5292 $dstat =~ s/$;//g;
5293 $dstat =~ s/\\\n.//g;
5294 $dstat =~ s/^\s*//s;
5295 $dstat =~ s/\s*$//s;
5296
5297 # Flatten any parentheses and braces
5298 while ($dstat =~ s/\([^\(\)]*\)/1/ ||
5299 $dstat =~ s/\{[^\{\}]*\}/1/ ||
5300 $dstat =~ s/.\[[^\[\]]*\]/1/)
5301 {
5302 }
5303
5304 # Flatten any obvious string concatenation.
5305 while ($dstat =~ s/($String)\s*$Ident/$1/ ||
5306 $dstat =~ s/$Ident\s*($String)/$1/)
5307 {
5308 }
5309
5310 # Make asm volatile uses seem like a generic function
5311 $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;
5312
5313 my $exceptions = qr{
5314 $Declare|
5315 module_param_named|
5316 MODULE_PARM_DESC|
5317 DECLARE_PER_CPU|
5318 DEFINE_PER_CPU|
5319 __typeof__\(|
5320 union|
5321 struct|
5322 \.$Ident\s*=\s*|
5323 ^\"|\"$|
5324 ^\[
5325 }x;
5326 #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
5327
5328 $ctx =~ s/\n*$//;
5329 my $stmt_cnt = statement_rawlines($ctx);
5330 my $herectx = get_stat_here($linenr, $stmt_cnt, $here);
5331
5332 if ($dstat ne '' &&
5333 $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
5334 $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
5335 $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz
5336 $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ && # character constants
5337 $dstat !~ /$exceptions/ &&
5338 $dstat !~ /^\.$Ident\s*=/ && # .foo =
5339 $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo
5340 $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...)
5341 $dstat !~ /^for\s*$Constant$/ && # for (...)
5342 $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar()
5343 $dstat !~ /^do\s*{/ && # do {...
5344 $dstat !~ /^\(\{/ && # ({...
5345 $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
5346 {
5347 if ($dstat =~ /^\s*if\b/) {
5348 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5349 "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx");
5350 } elsif ($dstat =~ /;/) {
5351 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
5352 "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
5353 } else {
5354 ERROR("COMPLEX_MACRO",
5355 "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
5356 }
5357
5358 }
5359
5360 # Make $define_stmt single line, comment-free, etc
5361 my @stmt_array = split('\n', $define_stmt);
5362 my $first = 1;
5363 $define_stmt = "";
5364 foreach my $l (@stmt_array) {
5365 $l =~ s/\\$//;
5366 if ($first) {
5367 $define_stmt = $l;
5368 $first = 0;
5369 } elsif ($l =~ /^[\+ ]/) {
5370 $define_stmt .= substr($l, 1);
5371 }
5372 }
5373 $define_stmt =~ s/$;//g;
5374 $define_stmt =~ s/\s+/ /g;
5375 $define_stmt = trim($define_stmt);
5376
5377# check if any macro arguments are reused (ignore '...' and 'type')
5378 foreach my $arg (@def_args) {
5379 next if ($arg =~ /\.\.\./);
5380 next if ($arg =~ /^type$/i);
5381 my $tmp_stmt = $define_stmt;
5382 $tmp_stmt =~ s/\b(sizeof|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
5383 $tmp_stmt =~ s/\#+\s*$arg\b//g;
5384 $tmp_stmt =~ s/\b$arg\s*\#\#//g;
5385 my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g;
5386 if ($use_cnt > 1) {
5387 CHK("MACRO_ARG_REUSE",
5388 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
5389 }
5390# check if any macro arguments may have other precedence issues
5391 if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
5392 ((defined($1) && $1 ne ',') ||
5393 (defined($2) && $2 ne ','))) {
5394 CHK("MACRO_ARG_PRECEDENCE",
5395 "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
5396 }
5397 }
5398
5399# check for macros with flow control, but without ## concatenation
5400# ## concatenation is commonly a macro that defines a function so ignore those
5401 if ($has_flow_statement && !$has_arg_concat) {
5402 my $cnt = statement_rawlines($ctx);
5403 my $herectx = get_stat_here($linenr, $cnt, $here);
5404
5405 WARN("MACRO_WITH_FLOW_CONTROL",
5406 "Macros with flow control statements should be avoided\n" . "$herectx");
5407 }
5408
5409# check for line continuations outside of #defines, preprocessor #, and asm
5410
5411 } else {
5412 if ($prevline !~ /^..*\\$/ &&
5413 $line !~ /^\+\s*\#.*\\$/ && # preprocessor
5414 $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ && # asm
5415 $line =~ /^\+.*\\$/) {
5416 WARN("LINE_CONTINUATIONS",
5417 "Avoid unnecessary line continuations\n" . $herecurr);
5418 }
5419 }
5420
5421# do {} while (0) macro tests:
5422# single-statement macros do not need to be enclosed in do while (0) loop,
5423# macro should not end with a semicolon
5424 if ($perl_version_ok &&
5425 $realfile !~ m@/vmlinux.lds.h$@ &&
5426 $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) {
5427 my $ln = $linenr;
5428 my $cnt = $realcnt;
5429 my ($off, $dstat, $dcond, $rest);
5430 my $ctx = '';
5431 ($dstat, $dcond, $ln, $cnt, $off) =
5432 ctx_statement_block($linenr, $realcnt, 0);
5433 $ctx = $dstat;
5434
5435 $dstat =~ s/\\\n.//g;
5436 $dstat =~ s/$;/ /g;
5437
5438 if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) {
5439 my $stmts = $2;
5440 my $semis = $3;
5441
5442 $ctx =~ s/\n*$//;
5443 my $cnt = statement_rawlines($ctx);
5444 my $herectx = get_stat_here($linenr, $cnt, $here);
5445
5446 if (($stmts =~ tr/;/;/) == 1 &&
5447 $stmts !~ /^\s*(if|while|for|switch)\b/) {
5448 WARN("SINGLE_STATEMENT_DO_WHILE_MACRO",
5449 "Single statement macros should not use a do {} while (0) loop\n" . "$herectx");
5450 }
5451 if (defined $semis && $semis ne "") {
5452 WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON",
5453 "do {} while (0) macros should not be semicolon terminated\n" . "$herectx");
5454 }
5455 } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) {
5456 $ctx =~ s/\n*$//;
5457 my $cnt = statement_rawlines($ctx);
5458 my $herectx = get_stat_here($linenr, $cnt, $here);
5459
5460 WARN("TRAILING_SEMICOLON",
5461 "macros should not use a trailing semicolon\n" . "$herectx");
5462 }
5463 }
5464
5465# check for redundant bracing round if etc
5466 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
5467 my ($level, $endln, @chunks) =
5468 ctx_statement_full($linenr, $realcnt, 1);
5469 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
5470 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
5471 if ($#chunks > 0 && $level == 0) {
5472 my @allowed = ();
5473 my $allow = 0;
5474 my $seen = 0;
5475 my $herectx = $here . "\n";
5476 my $ln = $linenr - 1;
5477 for my $chunk (@chunks) {
5478 my ($cond, $block) = @{$chunk};
5479
5480 # If the condition carries leading newlines, then count those as offsets.
5481 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
5482 my $offset = statement_rawlines($whitespace) - 1;
5483
5484 $allowed[$allow] = 0;
5485 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
5486
5487 # We have looked at and allowed this specific line.
5488 $suppress_ifbraces{$ln + $offset} = 1;
5489
5490 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
5491 $ln += statement_rawlines($block) - 1;
5492
5493 substr($block, 0, length($cond), '');
5494
5495 $seen++ if ($block =~ /^\s*{/);
5496
5497 #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n";
5498 if (statement_lines($cond) > 1) {
5499 #print "APW: ALLOWED: cond<$cond>\n";
5500 $allowed[$allow] = 1;
5501 }
5502 if ($block =~/\b(?:if|for|while)\b/) {
5503 #print "APW: ALLOWED: block<$block>\n";
5504 $allowed[$allow] = 1;
5505 }
5506 if (statement_block_size($block) > 1) {
5507 #print "APW: ALLOWED: lines block<$block>\n";
5508 $allowed[$allow] = 1;
5509 }
5510 $allow++;
5511 }
5512 if ($seen) {
5513 my $sum_allowed = 0;
5514 foreach (@allowed) {
5515 $sum_allowed += $_;
5516 }
5517 if ($sum_allowed == 0) {
5518 WARN("BRACES",
5519 "braces {} are not necessary for any arm of this statement\n" . $herectx);
5520 } elsif ($sum_allowed != $allow &&
5521 $seen != $allow) {
5522 CHK("BRACES",
5523 "braces {} should be used on all arms of this statement\n" . $herectx);
5524 }
5525 }
5526 }
5527 }
5528 if (!defined $suppress_ifbraces{$linenr - 1} &&
5529 $line =~ /\b(if|while|for|else)\b/) {
5530 my $allowed = 0;
5531
5532 # Check the pre-context.
5533 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
5534 #print "APW: ALLOWED: pre<$1>\n";
5535 $allowed = 1;
5536 }
5537
5538 my ($level, $endln, @chunks) =
5539 ctx_statement_full($linenr, $realcnt, $-[0]);
5540
5541 # Check the condition.
5542 my ($cond, $block) = @{$chunks[0]};
5543 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
5544 if (defined $cond) {
5545 substr($block, 0, length($cond), '');
5546 }
5547 if (statement_lines($cond) > 1) {
5548 #print "APW: ALLOWED: cond<$cond>\n";
5549 $allowed = 1;
5550 }
5551 if ($block =~/\b(?:if|for|while)\b/) {
5552 #print "APW: ALLOWED: block<$block>\n";
5553 $allowed = 1;
5554 }
5555 if (statement_block_size($block) > 1) {
5556 #print "APW: ALLOWED: lines block<$block>\n";
5557 $allowed = 1;
5558 }
5559 # Check the post-context.
5560 if (defined $chunks[1]) {
5561 my ($cond, $block) = @{$chunks[1]};
5562 if (defined $cond) {
5563 substr($block, 0, length($cond), '');
5564 }
5565 if ($block =~ /^\s*\{/) {
5566 #print "APW: ALLOWED: chunk-1 block<$block>\n";
5567 $allowed = 1;
5568 }
5569 }
5570 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
5571 my $cnt = statement_rawlines($block);
5572 my $herectx = get_stat_here($linenr, $cnt, $here);
5573
5574 WARN("BRACES",
5575 "braces {} are not necessary for single statement blocks\n" . $herectx);
5576 }
5577 }
5578
5579# check for single line unbalanced braces
5580 if ($sline =~ /^.\s*\}\s*else\s*$/ ||
5581 $sline =~ /^.\s*else\s*\{\s*$/) {
5582 CHK("BRACES", "Unbalanced braces around else statement\n" . $herecurr);
5583 }
5584
5585# check for unnecessary blank lines around braces
5586 if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
5587 if (CHK("BRACES",
5588 "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
5589 $fix && $prevrawline =~ /^\+/) {
5590 fix_delete_line($fixlinenr - 1, $prevrawline);
5591 }
5592 }
5593 if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
5594 if (CHK("BRACES",
5595 "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
5596 $fix) {
5597 fix_delete_line($fixlinenr, $rawline);
5598 }
5599 }
5600
5601# no volatiles please
5602 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
5603 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
5604 WARN("VOLATILE",
5605 "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr);
5606 }
5607
5608# Check for user-visible strings broken across lines, which breaks the ability
5609# to grep for the string. Make exceptions when the previous string ends in a
5610# newline (multiple lines in one string constant) or '\t', '\r', ';', or '{'
5611# (common in inline assembly) or is a octal \123 or hexadecimal \xaf value
5612 if ($line =~ /^\+\s*$String/ &&
5613 $prevline =~ /"\s*$/ &&
5614 $prevrawline !~ /(?:\\(?:[ntr]|[0-7]{1,3}|x[0-9a-fA-F]{1,2})|;\s*|\{\s*)"\s*$/) {
5615 if (WARN("SPLIT_STRING",
5616 "quoted string split across lines\n" . $hereprev) &&
5617 $fix &&
5618 $prevrawline =~ /^\+.*"\s*$/ &&
5619 $last_coalesced_string_linenr != $linenr - 1) {
5620 my $extracted_string = get_quoted_string($line, $rawline);
5621 my $comma_close = "";
5622 if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) {
5623 $comma_close = $1;
5624 }
5625
5626 fix_delete_line($fixlinenr - 1, $prevrawline);
5627 fix_delete_line($fixlinenr, $rawline);
5628 my $fixedline = $prevrawline;
5629 $fixedline =~ s/"\s*$//;
5630 $fixedline .= substr($extracted_string, 1) . trim($comma_close);
5631 fix_insert_line($fixlinenr - 1, $fixedline);
5632 $fixedline = $rawline;
5633 $fixedline =~ s/\Q$extracted_string\E\Q$comma_close\E//;
5634 if ($fixedline !~ /\+\s*$/) {
5635 fix_insert_line($fixlinenr, $fixedline);
5636 }
5637 $last_coalesced_string_linenr = $linenr;
5638 }
5639 }
5640
5641# check for missing a space in a string concatenation
5642 if ($prevrawline =~ /[^\\]\w"$/ && $rawline =~ /^\+[\t ]+"\w/) {
5643 WARN('MISSING_SPACE',
5644 "break quoted strings at a space character\n" . $hereprev);
5645 }
5646
5647# check for an embedded function name in a string when the function is known
5648# This does not work very well for -f --file checking as it depends on patch
5649# context providing the function name or a single line form for in-file
5650# function declarations
5651 if ($line =~ /^\+.*$String/ &&
5652 defined($context_function) &&
5653 get_quoted_string($line, $rawline) =~ /\b$context_function\b/ &&
5654 length(get_quoted_string($line, $rawline)) != (length($context_function) + 2)) {
5655 WARN("EMBEDDED_FUNCTION_NAME",
5656 "Prefer using '\"%s...\", __func__' to using '$context_function', this function's name, in a string\n" . $herecurr);
5657 }
5658
5659# check for spaces before a quoted newline
5660 if ($rawline =~ /^.*\".*\s\\n/) {
5661 if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
5662 "unnecessary whitespace before a quoted newline\n" . $herecurr) &&
5663 $fix) {
5664 $fixed[$fixlinenr] =~ s/^(\+.*\".*)\s+\\n/$1\\n/;
5665 }
5666
5667 }
5668
5669# concatenated string without spaces between elements
5670 if ($line =~ /$String[A-Za-z0-9_]/ || $line =~ /[A-Za-z0-9_]$String/) {
5671 if (CHK("CONCATENATED_STRING",
5672 "Concatenated strings should use spaces between elements\n" . $herecurr) &&
5673 $fix) {
5674 while ($line =~ /($String)/g) {
5675 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
5676 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E([A-Za-z0-9_])/$extracted_string $1/;
5677 $fixed[$fixlinenr] =~ s/([A-Za-z0-9_])\Q$extracted_string\E/$1 $extracted_string/;
5678 }
5679 }
5680 }
5681
5682# uncoalesced string fragments
5683 if ($line =~ /$String\s*"/) {
5684 if (WARN("STRING_FRAGMENTS",
5685 "Consecutive strings are generally better as a single string\n" . $herecurr) &&
5686 $fix) {
5687 while ($line =~ /($String)(?=\s*")/g) {
5688 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]);
5689 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E\s*"/substr($extracted_string, 0, -1)/e;
5690 }
5691 }
5692 }
5693
5694# check for non-standard and hex prefixed decimal printf formats
5695 my $show_L = 1; #don't show the same defect twice
5696 my $show_Z = 1;
5697 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
5698 my $string = substr($rawline, $-[1], $+[1] - $-[1]);
5699 $string =~ s/%%/__/g;
5700 # check for %L
5701 if ($show_L && $string =~ /%[\*\d\.\$]*L([diouxX])/) {
5702 WARN("PRINTF_L",
5703 "\%L$1 is non-standard C, use %ll$1\n" . $herecurr);
5704 $show_L = 0;
5705 }
5706 # check for %Z
5707 if ($show_Z && $string =~ /%[\*\d\.\$]*Z([diouxX])/) {
5708 WARN("PRINTF_Z",
5709 "%Z$1 is non-standard C, use %z$1\n" . $herecurr);
5710 $show_Z = 0;
5711 }
5712 # check for 0x<decimal>
5713 if ($string =~ /0x%[\*\d\.\$\Llzth]*[diou]/) {
5714 ERROR("PRINTF_0XDECIMAL",
5715 "Prefixing 0x with decimal output is defective\n" . $herecurr);
5716 }
5717 }
5718
5719# check for line continuations in quoted strings with odd counts of "
5720 if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) {
5721 WARN("LINE_CONTINUATIONS",
5722 "Avoid line continuations in quoted strings\n" . $herecurr);
5723 }
5724
5725# warn about #if 0
5726 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
5727 WARN("IF_0",
5728 "Consider removing the code enclosed by this #if 0 and its #endif\n" . $herecurr);
5729 }
5730
5731# warn about #if 1
5732 if ($line =~ /^.\s*\#\s*if\s+1\b/) {
5733 WARN("IF_1",
5734 "Consider removing the #if 1 and its #endif\n" . $herecurr);
5735 }
5736
5737# check for needless "if (<foo>) fn(<foo>)" uses
5738 if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) {
5739 my $tested = quotemeta($1);
5740 my $expr = '\s*\(\s*' . $tested . '\s*\)\s*;';
5741 if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?|(?:kmem_cache|mempool|dma_pool)_destroy)$expr/) {
5742 my $func = $1;
5743 if (WARN('NEEDLESS_IF',
5744 "$func(NULL) is safe and this check is probably not required\n" . $hereprev) &&
5745 $fix) {
5746 my $do_fix = 1;
5747 my $leading_tabs = "";
5748 my $new_leading_tabs = "";
5749 if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) {
5750 $leading_tabs = $1;
5751 } else {
5752 $do_fix = 0;
5753 }
5754 if ($lines[$linenr - 1] =~ /^\+(\t+)$func\s*\(\s*$tested\s*\)\s*;\s*$/) {
5755 $new_leading_tabs = $1;
5756 if (length($leading_tabs) + 1 ne length($new_leading_tabs)) {
5757 $do_fix = 0;
5758 }
5759 } else {
5760 $do_fix = 0;
5761 }
5762 if ($do_fix) {
5763 fix_delete_line($fixlinenr - 1, $prevrawline);
5764 $fixed[$fixlinenr] =~ s/^\+$new_leading_tabs/\+$leading_tabs/;
5765 }
5766 }
5767 }
5768 }
5769
5770# check for unnecessary "Out of Memory" messages
5771 if ($line =~ /^\+.*\b$logFunctions\s*\(/ &&
5772 $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ &&
5773 (defined $1 || defined $3) &&
5774 $linenr > 3) {
5775 my $testval = $2;
5776 my $testline = $lines[$linenr - 3];
5777
5778 my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
5779# print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
5780
5781 if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*$allocFunctions\s*\(/ &&
5782 $s !~ /\b__GFP_NOWARN\b/ ) {
5783 WARN("OOM_MESSAGE",
5784 "Possible unnecessary 'out of memory' message\n" . $hereprev);
5785 }
5786 }
5787
5788# check for logging functions with KERN_<LEVEL>
5789 if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ &&
5790 $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
5791 my $level = $1;
5792 if (WARN("UNNECESSARY_KERN_LEVEL",
5793 "Possible unnecessary $level\n" . $herecurr) &&
5794 $fix) {
5795 $fixed[$fixlinenr] =~ s/\s*$level\s*//;
5796 }
5797 }
5798
5799# check for logging continuations
5800 if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) {
5801 WARN("LOGGING_CONTINUATION",
5802 "Avoid logging continuation uses where feasible\n" . $herecurr);
5803 }
5804
5805# check for mask then right shift without a parentheses
5806 if ($perl_version_ok &&
5807 $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ &&
5808 $4 !~ /^\&/) { # $LvalOrFunc may be &foo, ignore if so
5809 WARN("MASK_THEN_SHIFT",
5810 "Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr);
5811 }
5812
5813# check for pointer comparisons to NULL
5814 if ($perl_version_ok) {
5815 while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) {
5816 my $val = $1;
5817 my $equal = "!";
5818 $equal = "" if ($4 eq "!=");
5819 if (CHK("COMPARISON_TO_NULL",
5820 "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) &&
5821 $fix) {
5822 $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/;
5823 }
5824 }
5825 }
5826
5827# check for bad placement of section $InitAttribute (e.g.: __initdata)
5828 if ($line =~ /(\b$InitAttribute\b)/) {
5829 my $attr = $1;
5830 if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*[=;]/) {
5831 my $ptr = $1;
5832 my $var = $2;
5833 if ((($ptr =~ /\b(union|struct)\s+$attr\b/ &&
5834 ERROR("MISPLACED_INIT",
5835 "$attr should be placed after $var\n" . $herecurr)) ||
5836 ($ptr !~ /\b(union|struct)\s+$attr\b/ &&
5837 WARN("MISPLACED_INIT",
5838 "$attr should be placed after $var\n" . $herecurr))) &&
5839 $fix) {
5840 $fixed[$fixlinenr] =~ s/(\bstatic\s+(?:const\s+)?)(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*([=;])\s*/"$1" . trim(string_find_replace($2, "\\s*$attr\\s*", " ")) . " " . trim(string_find_replace($3, "\\s*$attr\\s*", "")) . " $attr" . ("$4" eq ";" ? ";" : " = ")/e;
5841 }
5842 }
5843 }
5844
5845# check for $InitAttributeData (ie: __initdata) with const
5846 if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) {
5847 my $attr = $1;
5848 $attr =~ /($InitAttributePrefix)(.*)/;
5849 my $attr_prefix = $1;
5850 my $attr_type = $2;
5851 if (ERROR("INIT_ATTRIBUTE",
5852 "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) &&
5853 $fix) {
5854 $fixed[$fixlinenr] =~
5855 s/$InitAttributeData/${attr_prefix}initconst/;
5856 }
5857 }
5858
5859# check for $InitAttributeConst (ie: __initconst) without const
5860 if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) {
5861 my $attr = $1;
5862 if (ERROR("INIT_ATTRIBUTE",
5863 "Use of $attr requires a separate use of const\n" . $herecurr) &&
5864 $fix) {
5865 my $lead = $fixed[$fixlinenr] =~
5866 /(^\+\s*(?:static\s+))/;
5867 $lead = rtrim($1);
5868 $lead = "$lead " if ($lead !~ /^\+$/);
5869 $lead = "${lead}const ";
5870 $fixed[$fixlinenr] =~ s/(^\+\s*(?:static\s+))/$lead/;
5871 }
5872 }
5873
5874# check for __read_mostly with const non-pointer (should just be const)
5875 if ($line =~ /\b__read_mostly\b/ &&
5876 $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) {
5877 if (ERROR("CONST_READ_MOSTLY",
5878 "Invalid use of __read_mostly with const type\n" . $herecurr) &&
5879 $fix) {
5880 $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//;
5881 }
5882 }
5883
5884# don't use __constant_<foo> functions outside of include/uapi/
5885 if ($realfile !~ m@^include/uapi/@ &&
5886 $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) {
5887 my $constant_func = $1;
5888 my $func = $constant_func;
5889 $func =~ s/^__constant_//;
5890 if (WARN("CONSTANT_CONVERSION",
5891 "$constant_func should be $func\n" . $herecurr) &&
5892 $fix) {
5893 $fixed[$fixlinenr] =~ s/\b$constant_func\b/$func/g;
5894 }
5895 }
5896
5897# prefer usleep_range over udelay
5898 if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
5899 my $delay = $1;
5900 # ignore udelay's < 10, however
5901 if (! ($delay < 10) ) {
5902 CHK("USLEEP_RANGE",
5903 "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst\n" . $herecurr);
5904 }
5905 if ($delay > 2000) {
5906 WARN("LONG_UDELAY",
5907 "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . $herecurr);
5908 }
5909 }
5910
5911# warn about unexpectedly long msleep's
5912 if ($line =~ /\bmsleep\s*\((\d+)\);/) {
5913 if ($1 < 20) {
5914 WARN("MSLEEP",
5915 "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst\n" . $herecurr);
5916 }
5917 }
5918
5919# check for comparisons of jiffies
5920 if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) {
5921 WARN("JIFFIES_COMPARISON",
5922 "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr);
5923 }
5924
5925# check for comparisons of get_jiffies_64()
5926 if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) {
5927 WARN("JIFFIES_COMPARISON",
5928 "Comparing get_jiffies_64() is almost always wrong; prefer time_after64, time_before64 and friends\n" . $herecurr);
5929 }
5930
5931# warn about #ifdefs in C files
5932# if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
5933# print "#ifdef in C files should be avoided\n";
5934# print "$herecurr";
5935# $clean = 0;
5936# }
5937
5938# warn about spacing in #ifdefs
5939 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
5940 if (ERROR("SPACING",
5941 "exactly one space required after that #$1\n" . $herecurr) &&
5942 $fix) {
5943 $fixed[$fixlinenr] =~
5944 s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /;
5945 }
5946
5947 }
5948
5949# check for spinlock_t definitions without a comment.
5950 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
5951 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
5952 my $which = $1;
5953 if (!ctx_has_comment($first_line, $linenr)) {
5954 CHK("UNCOMMENTED_DEFINITION",
5955 "$1 definition without comment\n" . $herecurr);
5956 }
5957 }
5958# check for memory barriers without a comment.
5959
5960 my $barriers = qr{
5961 mb|
5962 rmb|
5963 wmb
5964 }x;
5965 my $barrier_stems = qr{
5966 mb__before_atomic|
5967 mb__after_atomic|
5968 store_release|
5969 load_acquire|
5970 store_mb|
5971 (?:$barriers)
5972 }x;
5973 my $all_barriers = qr{
5974 (?:$barriers)|
5975 smp_(?:$barrier_stems)|
5976 virt_(?:$barrier_stems)
5977 }x;
5978
5979 if ($line =~ /\b(?:$all_barriers)\s*\(/) {
5980 if (!ctx_has_comment($first_line, $linenr)) {
5981 WARN("MEMORY_BARRIER",
5982 "memory barrier without comment\n" . $herecurr);
5983 }
5984 }
5985
5986 my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;
5987
5988 if ($realfile !~ m@^include/asm-generic/@ &&
5989 $realfile !~ m@/barrier\.h$@ &&
5990 $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
5991 $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) {
5992 WARN("MEMORY_BARRIER",
5993 "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
5994 }
5995
5996# check for waitqueue_active without a comment.
5997 if ($line =~ /\bwaitqueue_active\s*\(/) {
5998 if (!ctx_has_comment($first_line, $linenr)) {
5999 WARN("WAITQUEUE_ACTIVE",
6000 "waitqueue_active without comment\n" . $herecurr);
6001 }
6002 }
6003
6004# check for data_race without a comment.
6005 if ($line =~ /\bdata_race\s*\(/) {
6006 if (!ctx_has_comment($first_line, $linenr)) {
6007 WARN("DATA_RACE",
6008 "data_race without comment\n" . $herecurr);
6009 }
6010 }
6011
6012# check of hardware specific defines
6013 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
6014 CHK("ARCH_DEFINES",
6015 "architecture specific defines should be avoided\n" . $herecurr);
6016 }
6017
6018# check that the storage class is not after a type
6019 if ($line =~ /\b($Type)\s+($Storage)\b/) {
6020 WARN("STORAGE_CLASS",
6021 "storage class '$2' should be located before type '$1'\n" . $herecurr);
6022 }
6023# Check that the storage class is at the beginning of a declaration
6024 if ($line =~ /\b$Storage\b/ &&
6025 $line !~ /^.\s*$Storage/ &&
6026 $line =~ /^.\s*(.+?)\$Storage\s/ &&
6027 $1 !~ /[\,\)]\s*$/) {
6028 WARN("STORAGE_CLASS",
6029 "storage class should be at the beginning of the declaration\n" . $herecurr);
6030 }
6031
6032# check the location of the inline attribute, that it is between
6033# storage class and type.
6034 if ($line =~ /\b$Type\s+$Inline\b/ ||
6035 $line =~ /\b$Inline\s+$Storage\b/) {
6036 ERROR("INLINE_LOCATION",
6037 "inline keyword should sit between storage class and type\n" . $herecurr);
6038 }
6039
6040# Check for __inline__ and __inline, prefer inline
6041 if ($realfile !~ m@\binclude/uapi/@ &&
6042 $line =~ /\b(__inline__|__inline)\b/) {
6043 if (WARN("INLINE",
6044 "plain inline is preferred over $1\n" . $herecurr) &&
6045 $fix) {
6046 $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/;
6047
6048 }
6049 }
6050
6051# Check for __attribute__ packed, prefer __packed
6052 if ($realfile !~ m@\binclude/uapi/@ &&
6053 $line =~ /\b__attribute__\s*\(\s*\(.*\bpacked\b/) {
6054 WARN("PREFER_PACKED",
6055 "__packed is preferred over __attribute__((packed))\n" . $herecurr);
6056 }
6057
6058# Check for __attribute__ aligned, prefer __aligned
6059 if ($realfile !~ m@\binclude/uapi/@ &&
6060 $line =~ /\b__attribute__\s*\(\s*\(.*aligned/) {
6061 WARN("PREFER_ALIGNED",
6062 "__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr);
6063 }
6064
6065# Check for __attribute__ section, prefer __section
6066 if ($realfile !~ m@\binclude/uapi/@ &&
6067 $line =~ /\b__attribute__\s*\(\s*\(.*_*section_*\s*\(\s*("[^"]*")/) {
6068 my $old = substr($rawline, $-[1], $+[1] - $-[1]);
6069 my $new = substr($old, 1, -1);
6070 if (WARN("PREFER_SECTION",
6071 "__section($new) is preferred over __attribute__((section($old)))\n" . $herecurr) &&
6072 $fix) {
6073 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*_*section_*\s*\(\s*\Q$old\E\s*\)\s*\)\s*\)/__section($new)/;
6074 }
6075 }
6076
6077# Check for __attribute__ format(printf, prefer __printf
6078 if ($realfile !~ m@\binclude/uapi/@ &&
6079 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) {
6080 if (WARN("PREFER_PRINTF",
6081 "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr) &&
6082 $fix) {
6083 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.*)\)\s*\)\s*\)/"__printf(" . trim($1) . ")"/ex;
6084
6085 }
6086 }
6087
6088# Check for __attribute__ format(scanf, prefer __scanf
6089 if ($realfile !~ m@\binclude/uapi/@ &&
6090 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) {
6091 if (WARN("PREFER_SCANF",
6092 "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr) &&
6093 $fix) {
6094 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\s*,\s*(.*)\)\s*\)\s*\)/"__scanf(" . trim($1) . ")"/ex;
6095 }
6096 }
6097
6098# Check for __attribute__ weak, or __weak declarations (may have link issues)
6099 if ($perl_version_ok &&
6100 $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ &&
6101 ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ ||
6102 $line =~ /\b__weak\b/)) {
6103 ERROR("WEAK_DECLARATION",
6104 "Using weak declarations can have unintended link defects\n" . $herecurr);
6105 }
6106
6107# check for c99 types like uint8_t used outside of uapi/ and tools/
6108 if ($realfile !~ m@\binclude/uapi/@ &&
6109 $realfile !~ m@\btools/@ &&
6110 $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
6111 my $type = $1;
6112 if ($type =~ /\b($typeC99Typedefs)\b/) {
6113 $type = $1;
6114 my $kernel_type = 'u';
6115 $kernel_type = 's' if ($type =~ /^_*[si]/);
6116 $type =~ /(\d+)/;
6117 $kernel_type .= $1;
6118 if (CHK("PREFER_KERNEL_TYPES",
6119 "Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) &&
6120 $fix) {
6121 $fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/;
6122 }
6123 }
6124 }
6125
6126# check for cast of C90 native int or longer types constants
6127 if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
6128 my $cast = $1;
6129 my $const = $2;
6130 if (WARN("TYPECAST_INT_CONSTANT",
6131 "Unnecessary typecast of c90 int constant\n" . $herecurr) &&
6132 $fix) {
6133 my $suffix = "";
6134 my $newconst = $const;
6135 $newconst =~ s/${Int_type}$//;
6136 $suffix .= 'U' if ($cast =~ /\bunsigned\b/);
6137 if ($cast =~ /\blong\s+long\b/) {
6138 $suffix .= 'LL';
6139 } elsif ($cast =~ /\blong\b/) {
6140 $suffix .= 'L';
6141 }
6142 $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
6143 }
6144 }
6145
6146# check for sizeof(&)
6147 if ($line =~ /\bsizeof\s*\(\s*\&/) {
6148 WARN("SIZEOF_ADDRESS",
6149 "sizeof(& should be avoided\n" . $herecurr);
6150 }
6151
6152# check for sizeof without parenthesis
6153 if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) {
6154 if (WARN("SIZEOF_PARENTHESIS",
6155 "sizeof $1 should be sizeof($1)\n" . $herecurr) &&
6156 $fix) {
6157 $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex;
6158 }
6159 }
6160
6161# check for struct spinlock declarations
6162 if ($line =~ /^.\s*\bstruct\s+spinlock\s+\w+\s*;/) {
6163 WARN("USE_SPINLOCK_T",
6164 "struct spinlock should be spinlock_t\n" . $herecurr);
6165 }
6166
6167# check for seq_printf uses that could be seq_puts
6168 if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) {
6169 my $fmt = get_quoted_string($line, $rawline);
6170 $fmt =~ s/%%//g;
6171 if ($fmt !~ /%/) {
6172 if (WARN("PREFER_SEQ_PUTS",
6173 "Prefer seq_puts to seq_printf\n" . $herecurr) &&
6174 $fix) {
6175 $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/;
6176 }
6177 }
6178 }
6179
6180# check for vsprintf extension %p<foo> misuses
6181 if ($perl_version_ok &&
6182 defined $stat &&
6183 $stat =~ /^\+(?![^\{]*\{\s*).*\b(\w+)\s*\(.*$String\s*,/s &&
6184 $1 !~ /^_*volatile_*$/) {
6185 my $stat_real;
6186
6187 my $lc = $stat =~ tr@\n@@;
6188 $lc = $lc + $linenr;
6189 for (my $count = $linenr; $count <= $lc; $count++) {
6190 my $specifier;
6191 my $extension;
6192 my $qualifier;
6193 my $bad_specifier = "";
6194 my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0));
6195 $fmt =~ s/%%//g;
6196
6197 while ($fmt =~ /(\%[\*\d\.]*p(\w)(\w*))/g) {
6198 $specifier = $1;
6199 $extension = $2;
6200 $qualifier = $3;
6201 if ($extension !~ /[SsBKRraEehMmIiUDdgVCbGNOxtf]/ ||
6202 ($extension eq "f" &&
6203 defined $qualifier && $qualifier !~ /^w/)) {
6204 $bad_specifier = $specifier;
6205 last;
6206 }
6207 if ($extension eq "x" && !defined($stat_real)) {
6208 if (!defined($stat_real)) {
6209 $stat_real = get_stat_real($linenr, $lc);
6210 }
6211 WARN("VSPRINTF_SPECIFIER_PX",
6212 "Using vsprintf specifier '\%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '\%p'.\n" . "$here\n$stat_real\n");
6213 }
6214 }
6215 if ($bad_specifier ne "") {
6216 my $stat_real = get_stat_real($linenr, $lc);
6217 my $ext_type = "Invalid";
6218 my $use = "";
6219 if ($bad_specifier =~ /p[Ff]/) {
6220 $use = " - use %pS instead";
6221 $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/);
6222 }
6223
6224 WARN("VSPRINTF_POINTER_EXTENSION",
6225 "$ext_type vsprintf pointer extension '$bad_specifier'$use\n" . "$here\n$stat_real\n");
6226 }
6227 }
6228 }
6229
6230# Check for misused memsets
6231 if ($perl_version_ok &&
6232 defined $stat &&
6233 $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/) {
6234
6235 my $ms_addr = $2;
6236 my $ms_val = $7;
6237 my $ms_size = $12;
6238
6239 if ($ms_size =~ /^(0x|)0$/i) {
6240 ERROR("MEMSET",
6241 "memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n");
6242 } elsif ($ms_size =~ /^(0x|)1$/i) {
6243 WARN("MEMSET",
6244 "single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n");
6245 }
6246 }
6247
6248# Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
6249# if ($perl_version_ok &&
6250# defined $stat &&
6251# $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6252# if (WARN("PREFER_ETHER_ADDR_COPY",
6253# "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
6254# $fix) {
6255# $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
6256# }
6257# }
6258
6259# Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar)
6260# if ($perl_version_ok &&
6261# defined $stat &&
6262# $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6263# WARN("PREFER_ETHER_ADDR_EQUAL",
6264# "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
6265# }
6266
6267# check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr
6268# check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr
6269# if ($perl_version_ok &&
6270# defined $stat &&
6271# $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
6272#
6273# my $ms_val = $7;
6274#
6275# if ($ms_val =~ /^(?:0x|)0+$/i) {
6276# if (WARN("PREFER_ETH_ZERO_ADDR",
6277# "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
6278# $fix) {
6279# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
6280# }
6281# } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
6282# if (WARN("PREFER_ETH_BROADCAST_ADDR",
6283# "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
6284# $fix) {
6285# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
6286# }
6287# }
6288# }
6289
6290# typecasts on min/max could be min_t/max_t
6291 if ($perl_version_ok &&
6292 defined $stat &&
6293 $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) {
6294 if (defined $2 || defined $7) {
6295 my $call = $1;
6296 my $cast1 = deparenthesize($2);
6297 my $arg1 = $3;
6298 my $cast2 = deparenthesize($7);
6299 my $arg2 = $8;
6300 my $cast;
6301
6302 if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) {
6303 $cast = "$cast1 or $cast2";
6304 } elsif ($cast1 ne "") {
6305 $cast = $cast1;
6306 } else {
6307 $cast = $cast2;
6308 }
6309 WARN("MINMAX",
6310 "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n");
6311 }
6312 }
6313
6314# check usleep_range arguments
6315 if ($perl_version_ok &&
6316 defined $stat &&
6317 $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
6318 my $min = $1;
6319 my $max = $7;
6320 if ($min eq $max) {
6321 WARN("USLEEP_RANGE",
6322 "usleep_range should not use min == max args; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6323 } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ &&
6324 $min > $max) {
6325 WARN("USLEEP_RANGE",
6326 "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n");
6327 }
6328 }
6329
6330# check for naked sscanf
6331 if ($perl_version_ok &&
6332 defined $stat &&
6333 $line =~ /\bsscanf\b/ &&
6334 ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ &&
6335 $stat !~ /\bsscanf\s*$balanced_parens\s*(?:$Compare)/ &&
6336 $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) {
6337 my $lc = $stat =~ tr@\n@@;
6338 $lc = $lc + $linenr;
6339 my $stat_real = get_stat_real($linenr, $lc);
6340 WARN("NAKED_SSCANF",
6341 "unchecked sscanf return value\n" . "$here\n$stat_real\n");
6342 }
6343
6344# check for simple sscanf that should be kstrto<foo>
6345 if ($perl_version_ok &&
6346 defined $stat &&
6347 $line =~ /\bsscanf\b/) {
6348 my $lc = $stat =~ tr@\n@@;
6349 $lc = $lc + $linenr;
6350 my $stat_real = get_stat_real($linenr, $lc);
6351 if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) {
6352 my $format = $6;
6353 my $count = $format =~ tr@%@%@;
6354 if ($count == 1 &&
6355 $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) {
6356 WARN("SSCANF_TO_KSTRTO",
6357 "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n");
6358 }
6359 }
6360 }
6361
6362# check for new externs in .h files.
6363 if ($realfile =~ /\.h$/ &&
6364 $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) {
6365 if (CHK("AVOID_EXTERNS",
6366 "extern prototypes should be avoided in .h files\n" . $herecurr) &&
6367 $fix) {
6368 $fixed[$fixlinenr] =~ s/(.*)\bextern\b\s*(.*)/$1$2/;
6369 }
6370 }
6371
6372# check for new externs in .c files.
6373 if ($realfile =~ /\.c$/ && defined $stat &&
6374 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
6375 {
6376 my $function_name = $1;
6377 my $paren_space = $2;
6378
6379 my $s = $stat;
6380 if (defined $cond) {
6381 substr($s, 0, length($cond), '');
6382 }
6383 if ($s =~ /^\s*;/)
6384 {
6385 WARN("AVOID_EXTERNS",
6386 "externs should be avoided in .c files\n" . $herecurr);
6387 }
6388
6389 if ($paren_space =~ /\n/) {
6390 WARN("FUNCTION_ARGUMENTS",
6391 "arguments for function declarations should follow identifier\n" . $herecurr);
6392 }
6393
6394 } elsif ($realfile =~ /\.c$/ && defined $stat &&
6395 $stat =~ /^.\s*extern\s+/)
6396 {
6397 WARN("AVOID_EXTERNS",
6398 "externs should be avoided in .c files\n" . $herecurr);
6399 }
6400
6401# check for function declarations that have arguments without identifier names
6402 if (defined $stat &&
6403 $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
6404 $1 ne "void") {
6405 my $args = trim($1);
6406 while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
6407 my $arg = trim($1);
6408 if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
6409 WARN("FUNCTION_ARGUMENTS",
6410 "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
6411 }
6412 }
6413 }
6414
6415# check for function definitions
6416 if ($perl_version_ok &&
6417 defined $stat &&
6418 $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) {
6419 $context_function = $1;
6420
6421# check for multiline function definition with misplaced open brace
6422 my $ok = 0;
6423 my $cnt = statement_rawlines($stat);
6424 my $herectx = $here . "\n";
6425 for (my $n = 0; $n < $cnt; $n++) {
6426 my $rl = raw_line($linenr, $n);
6427 $herectx .= $rl . "\n";
6428 $ok = 1 if ($rl =~ /^[ \+]\{/);
6429 $ok = 1 if ($rl =~ /\{/ && $n == 0);
6430 last if $rl =~ /^[ \+].*\{/;
6431 }
6432 if (!$ok) {
6433 ERROR("OPEN_BRACE",
6434 "open brace '{' following function definitions go on the next line\n" . $herectx);
6435 }
6436 }
6437
6438# checks for new __setup's
6439 if ($rawline =~ /\b__setup\("([^"]*)"/) {
6440 my $name = $1;
6441
6442 if (!grep(/$name/, @setup_docs)) {
6443 CHK("UNDOCUMENTED_SETUP",
6444 "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.txt\n" . $herecurr);
6445 }
6446 }
6447
6448# check for pointless casting of alloc functions
6449 if ($line =~ /\*\s*\)\s*$allocFunctions\b/) {
6450 WARN("UNNECESSARY_CASTS",
6451 "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
6452 }
6453
6454# alloc style
6455# p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...)
6456 if ($perl_version_ok &&
6457 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k|v)[mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) {
6458 CHK("ALLOC_SIZEOF_STRUCT",
6459 "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr);
6460 }
6461
6462# check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc
6463 if ($perl_version_ok &&
6464 defined $stat &&
6465 $stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
6466 my $oldfunc = $3;
6467 my $a1 = $4;
6468 my $a2 = $10;
6469 my $newfunc = "kmalloc_array";
6470 $newfunc = "kcalloc" if ($oldfunc eq "kzalloc");
6471 my $r1 = $a1;
6472 my $r2 = $a2;
6473 if ($a1 =~ /^sizeof\s*\S/) {
6474 $r1 = $a2;
6475 $r2 = $a1;
6476 }
6477 if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
6478 !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) {
6479 my $cnt = statement_rawlines($stat);
6480 my $herectx = get_stat_here($linenr, $cnt, $here);
6481
6482 if (WARN("ALLOC_WITH_MULTIPLY",
6483 "Prefer $newfunc over $oldfunc with multiply\n" . $herectx) &&
6484 $cnt == 1 &&
6485 $fix) {
6486 $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
6487 }
6488 }
6489 }
6490
6491# check for krealloc arg reuse
6492 if ($perl_version_ok &&
6493 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*($Lval)\s*,/ &&
6494 $1 eq $3) {
6495 WARN("KREALLOC_ARG_REUSE",
6496 "Reusing the krealloc arg is almost always a bug\n" . $herecurr);
6497 }
6498
6499# check for alloc argument mismatch
6500 if ($line =~ /\b(kcalloc|kmalloc_array)\s*\(\s*sizeof\b/) {
6501 WARN("ALLOC_ARRAY_ARGS",
6502 "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
6503 }
6504
6505# check for multiple semicolons
6506 if ($line =~ /;\s*;\s*$/) {
6507 if (WARN("ONE_SEMICOLON",
6508 "Statements terminations use 1 semicolon\n" . $herecurr) &&
6509 $fix) {
6510 $fixed[$fixlinenr] =~ s/(\s*;\s*){2,}$/;/g;
6511 }
6512 }
6513
6514# check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
6515 if ($realfile !~ m@^include/uapi/@ &&
6516 $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
6517 my $ull = "";
6518 $ull = "_ULL" if (defined($1) && $1 =~ /ll/i);
6519 if (CHK("BIT_MACRO",
6520 "Prefer using the BIT$ull macro\n" . $herecurr) &&
6521 $fix) {
6522 $fixed[$fixlinenr] =~ s/\(?\s*1\s*[ulUL]*\s*<<\s*(\d+|$Ident)\s*\)?/BIT${ull}($1)/;
6523 }
6524 }
6525
6526# check for IS_ENABLED() without CONFIG_<FOO> ($rawline for comments too)
6527 if ($rawline =~ /\bIS_ENABLED\s*\(\s*(\w+)\s*\)/ && $1 !~ /^CONFIG_/) {
6528 WARN("IS_ENABLED_CONFIG",
6529 "IS_ENABLED($1) is normally used as IS_ENABLED(CONFIG_$1)\n" . $herecurr);
6530 }
6531
6532# check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
6533 if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(CONFIG_[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) {
6534 my $config = $1;
6535 if (WARN("PREFER_IS_ENABLED",
6536 "Prefer IS_ENABLED(<FOO>) to CONFIG_<FOO> || CONFIG_<FOO>_MODULE\n" . $herecurr) &&
6537 $fix) {
6538 $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)";
6539 }
6540 }
6541
6542# check for /* fallthrough */ like comment, prefer fallthrough;
6543 my @fallthroughs = (
6544 'fallthrough',
6545 '@fallthrough@',
6546 'lint -fallthrough[ \t]*',
6547 'intentional(?:ly)?[ \t]*fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)',
6548 '(?:else,?\s*)?FALL(?:S | |-)?THR(?:OUGH|U|EW)[ \t.!]*(?:-[^\n\r]*)?',
6549 'Fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
6550 'fall(?:s | |-)?thr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
6551 );
6552 if ($raw_comment ne '') {
6553 foreach my $ft (@fallthroughs) {
6554 if ($raw_comment =~ /$ft/) {
6555 my $msg_level = \&WARN;
6556 $msg_level = \&CHK if ($file);
6557 &{$msg_level}("PREFER_FALLTHROUGH",
6558 "Prefer 'fallthrough;' over fallthrough comment\n" . $herecurr);
6559 last;
6560 }
6561 }
6562 }
6563
6564# check for switch/default statements without a break;
6565 if ($perl_version_ok &&
6566 defined $stat &&
6567 $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
6568 my $cnt = statement_rawlines($stat);
6569 my $herectx = get_stat_here($linenr, $cnt, $here);
6570
6571 WARN("DEFAULT_NO_BREAK",
6572 "switch default: should use break\n" . $herectx);
6573 }
6574
6575# check for gcc specific __FUNCTION__
6576 if ($line =~ /\b__FUNCTION__\b/) {
6577 if (WARN("USE_FUNC",
6578 "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr) &&
6579 $fix) {
6580 $fixed[$fixlinenr] =~ s/\b__FUNCTION__\b/__func__/g;
6581 }
6582 }
6583
6584# check for uses of __DATE__, __TIME__, __TIMESTAMP__
6585 while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
6586 ERROR("DATE_TIME",
6587 "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
6588 }
6589
6590# check for use of yield()
6591 if ($line =~ /\byield\s*\(\s*\)/) {
6592 WARN("YIELD",
6593 "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr);
6594 }
6595
6596# check for comparisons against true and false
6597 if ($line =~ /\+\s*(.*?)\b(true|false|$Lval)\s*(==|\!=)\s*(true|false|$Lval)\b(.*)$/i) {
6598 my $lead = $1;
6599 my $arg = $2;
6600 my $test = $3;
6601 my $otype = $4;
6602 my $trail = $5;
6603 my $op = "!";
6604
6605 ($arg, $otype) = ($otype, $arg) if ($arg =~ /^(?:true|false)$/i);
6606
6607 my $type = lc($otype);
6608 if ($type =~ /^(?:true|false)$/) {
6609 if (("$test" eq "==" && "$type" eq "true") ||
6610 ("$test" eq "!=" && "$type" eq "false")) {
6611 $op = "";
6612 }
6613
6614 CHK("BOOL_COMPARISON",
6615 "Using comparison to $otype is error prone\n" . $herecurr);
6616
6617## maybe suggesting a correct construct would better
6618## "Using comparison to $otype is error prone. Perhaps use '${lead}${op}${arg}${trail}'\n" . $herecurr);
6619
6620 }
6621 }
6622
6623# check for semaphores initialized locked
6624 if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
6625 WARN("CONSIDER_COMPLETION",
6626 "consider using a completion\n" . $herecurr);
6627 }
6628
6629# recommend kstrto* over simple_strto* and strict_strto*
6630 if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) {
6631 WARN("CONSIDER_KSTRTO",
6632 "$1 is obsolete, use k$3 instead\n" . $herecurr);
6633 }
6634
6635# check for __initcall(), use device_initcall() explicitly or more appropriate function please
6636 if ($line =~ /^.\s*__initcall\s*\(/) {
6637 WARN("USE_DEVICE_INITCALL",
6638 "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
6639 }
6640
6641# check for spin_is_locked(), suggest lockdep instead
6642 if ($line =~ /\bspin_is_locked\(/) {
6643 WARN("USE_LOCKDEP",
6644 "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr);
6645 }
6646
6647# check for deprecated apis
6648 if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) {
6649 my $deprecated_api = $1;
6650 my $new_api = $deprecated_apis{$deprecated_api};
6651 WARN("DEPRECATED_API",
6652 "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr);
6653 }
6654
6655# check for various structs that are normally const (ops, kgdb, device_tree)
6656# and avoid what seem like struct definitions 'struct foo {'
6657 if (defined($const_structs) &&
6658 $line !~ /\bconst\b/ &&
6659 $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) {
6660 WARN("CONST_STRUCT",
6661 "struct $1 should normally be const\n" . $herecurr);
6662 }
6663
6664# use of NR_CPUS is usually wrong
6665# ignore definitions of NR_CPUS and usage to define arrays as likely right
6666 if ($line =~ /\bNR_CPUS\b/ &&
6667 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
6668 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
6669 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
6670 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
6671 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
6672 {
6673 WARN("NR_CPUS",
6674 "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
6675 }
6676
6677# Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong.
6678 if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) {
6679 ERROR("DEFINE_ARCH_HAS",
6680 "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
6681 }
6682
6683# likely/unlikely comparisons similar to "(likely(foo) > 0)"
6684 if ($perl_version_ok &&
6685 $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) {
6686 WARN("LIKELY_MISUSE",
6687 "Using $1 should generally have parentheses around the comparison\n" . $herecurr);
6688 }
6689
6690# nested likely/unlikely calls
6691 if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) {
6692 WARN("LIKELY_MISUSE",
6693 "nested (un)?likely() calls, $1 already uses unlikely() internally\n" . $herecurr);
6694 }
6695
6696# whine mightly about in_atomic
6697 if ($line =~ /\bin_atomic\s*\(/) {
6698 if ($realfile =~ m@^drivers/@) {
6699 ERROR("IN_ATOMIC",
6700 "do not use in_atomic in drivers\n" . $herecurr);
6701 } elsif ($realfile !~ m@^kernel/@) {
6702 WARN("IN_ATOMIC",
6703 "use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
6704 }
6705 }
6706
6707# check for mutex_trylock_recursive usage
6708 if ($line =~ /mutex_trylock_recursive/) {
6709 ERROR("LOCKING",
6710 "recursive locking is bad, do not use this ever.\n" . $herecurr);
6711 }
6712
6713# check for lockdep_set_novalidate_class
6714 if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
6715 $line =~ /__lockdep_no_validate__\s*\)/ ) {
6716 if ($realfile !~ m@^kernel/lockdep@ &&
6717 $realfile !~ m@^include/linux/lockdep@ &&
6718 $realfile !~ m@^drivers/base/core@) {
6719 ERROR("LOCKDEP",
6720 "lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
6721 }
6722 }
6723
6724 if ($line =~ /debugfs_create_\w+.*\b$mode_perms_world_writable\b/ ||
6725 $line =~ /DEVICE_ATTR.*\b$mode_perms_world_writable\b/) {
6726 WARN("EXPORTED_WORLD_WRITABLE",
6727 "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
6728 }
6729
6730# check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO>
6731# and whether or not function naming is typical and if
6732# DEVICE_ATTR permissions uses are unusual too
6733 if ($perl_version_ok &&
6734 defined $stat &&
6735 $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) {
6736 my $var = $1;
6737 my $perms = $2;
6738 my $show = $3;
6739 my $store = $4;
6740 my $octal_perms = perms_to_octal($perms);
6741 if ($show =~ /^${var}_show$/ &&
6742 $store =~ /^${var}_store$/ &&
6743 $octal_perms eq "0644") {
6744 if (WARN("DEVICE_ATTR_RW",
6745 "Use DEVICE_ATTR_RW\n" . $herecurr) &&
6746 $fix) {
6747 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/;
6748 }
6749 } elsif ($show =~ /^${var}_show$/ &&
6750 $store =~ /^NULL$/ &&
6751 $octal_perms eq "0444") {
6752 if (WARN("DEVICE_ATTR_RO",
6753 "Use DEVICE_ATTR_RO\n" . $herecurr) &&
6754 $fix) {
6755 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/;
6756 }
6757 } elsif ($show =~ /^NULL$/ &&
6758 $store =~ /^${var}_store$/ &&
6759 $octal_perms eq "0200") {
6760 if (WARN("DEVICE_ATTR_WO",
6761 "Use DEVICE_ATTR_WO\n" . $herecurr) &&
6762 $fix) {
6763 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/;
6764 }
6765 } elsif ($octal_perms eq "0644" ||
6766 $octal_perms eq "0444" ||
6767 $octal_perms eq "0200") {
6768 my $newshow = "$show";
6769 $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show");
6770 my $newstore = $store;
6771 $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store");
6772 my $rename = "";
6773 if ($show ne $newshow) {
6774 $rename .= " '$show' to '$newshow'";
6775 }
6776 if ($store ne $newstore) {
6777 $rename .= " '$store' to '$newstore'";
6778 }
6779 WARN("DEVICE_ATTR_FUNCTIONS",
6780 "Consider renaming function(s)$rename\n" . $herecurr);
6781 } else {
6782 WARN("DEVICE_ATTR_PERMS",
6783 "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr);
6784 }
6785 }
6786
6787# Mode permission misuses where it seems decimal should be octal
6788# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
6789# o Ignore module_param*(...) uses with a decimal 0 permission as that has a
6790# specific definition of not visible in sysfs.
6791# o Ignore proc_create*(...) uses with a decimal 0 permission as that means
6792# use the default permissions
6793 if ($perl_version_ok &&
6794 defined $stat &&
6795 $line =~ /$mode_perms_search/) {
6796 foreach my $entry (@mode_permission_funcs) {
6797 my $func = $entry->[0];
6798 my $arg_pos = $entry->[1];
6799
6800 my $lc = $stat =~ tr@\n@@;
6801 $lc = $lc + $linenr;
6802 my $stat_real = get_stat_real($linenr, $lc);
6803
6804 my $skip_args = "";
6805 if ($arg_pos > 1) {
6806 $arg_pos--;
6807 $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
6808 }
6809 my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
6810 if ($stat =~ /$test/) {
6811 my $val = $1;
6812 $val = $6 if ($skip_args ne "");
6813 if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") &&
6814 (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
6815 ($val =~ /^$Octal$/ && length($val) ne 4))) {
6816 ERROR("NON_OCTAL_PERMISSIONS",
6817 "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
6818 }
6819 if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
6820 ERROR("EXPORTED_WORLD_WRITABLE",
6821 "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
6822 }
6823 }
6824 }
6825 }
6826
6827# check for uses of S_<PERMS> that could be octal for readability
6828 while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) {
6829 my $oval = $1;
6830 my $octal = perms_to_octal($oval);
6831 if (WARN("SYMBOLIC_PERMS",
6832 "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
6833 $fix) {
6834 $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/;
6835 }
6836 }
6837
6838# validate content of MODULE_LICENSE against list from include/linux/module.h
6839 if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
6840 my $extracted_string = get_quoted_string($line, $rawline);
6841 my $valid_licenses = qr{
6842 GPL|
6843 GPL\ v2|
6844 GPL\ and\ additional\ rights|
6845 Dual\ BSD/GPL|
6846 Dual\ MIT/GPL|
6847 Dual\ MPL/GPL|
6848 Proprietary
6849 }x;
6850 if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
6851 WARN("MODULE_LICENSE",
6852 "unknown module license " . $extracted_string . "\n" . $herecurr);
6853 }
6854 }
6855
6856# check for sysctl duplicate constants
6857 if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) {
6858 WARN("DUPLICATED_SYSCTL_CONST",
6859 "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr);
6860 }
6861 }
6862
6863 # If we have no input at all, then there is nothing to report on
6864 # so just keep quiet.
6865 if ($#rawlines == -1) {
6866 exit(0);
6867 }
6868
6869 # In mailback mode only produce a report in the negative, for
6870 # things that appear to be patches.
6871 if ($mailback && ($clean == 1 || !$is_patch)) {
6872 exit(0);
6873 }
6874
6875 # This is not a patch, and we are are in 'no-patch' mode so
6876 # just keep quiet.
6877 if (!$chk_patch && !$is_patch) {
6878 exit(0);
6879 }
6880
6881 if (!$is_patch && $filename !~ /cover-letter\.patch$/) {
6882 ERROR("NOT_UNIFIED_DIFF",
6883 "Does not appear to be a unified-diff format patch\n");
6884 }
6885 if ($is_patch && $has_commit_log && $chk_signoff) {
6886 if ($signoff == 0) {
6887 ERROR("MISSING_SIGN_OFF",
6888 "Missing Signed-off-by: line(s)\n");
6889 } elsif (!$authorsignoff) {
6890 WARN("NO_AUTHOR_SIGN_OFF",
6891 "Missing Signed-off-by: line by nominal patch author '$author'\n");
6892 }
6893 }
6894
6895 print report_dump();
6896 if ($summary && !($clean == 1 && $quiet == 1)) {
6897 print "$filename " if ($summary_file);
6898 print "total: $cnt_error errors, $cnt_warn warnings, " .
6899 (($check)? "$cnt_chk checks, " : "") .
6900 "$cnt_lines lines checked\n";
6901 }
6902
6903 if ($quiet == 0) {
6904 # If there were any defects found and not already fixing them
6905 if (!$clean and !$fix) {
6906 print << "EOM"
6907
6908NOTE: For some of the reported defects, checkpatch may be able to
6909 mechanically convert to the typical style using --fix or --fix-inplace.
6910EOM
6911 }
6912 # If there were whitespace errors which cleanpatch can fix
6913 # then suggest that.
6914 if ($rpt_cleaners) {
6915 $rpt_cleaners = 0;
6916 print << "EOM"
6917
6918NOTE: Whitespace errors detected.
6919 You may wish to use scripts/cleanpatch or scripts/cleanfile
6920EOM
6921 }
6922 }
6923
6924 if ($clean == 0 && $fix &&
6925 ("@rawlines" ne "@fixed" ||
6926 $#fixed_inserted >= 0 || $#fixed_deleted >= 0)) {
6927 my $newfile = $filename;
6928 $newfile .= ".EXPERIMENTAL-checkpatch-fixes" if (!$fix_inplace);
6929 my $linecount = 0;
6930 my $f;
6931
6932 @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted);
6933
6934 open($f, '>', $newfile)
6935 or die "$P: Can't open $newfile for write\n";
6936 foreach my $fixed_line (@fixed) {
6937 $linecount++;
6938 if ($file) {
6939 if ($linecount > 3) {
6940 $fixed_line =~ s/^\+//;
6941 print $f $fixed_line . "\n";
6942 }
6943 } else {
6944 print $f $fixed_line . "\n";
6945 }
6946 }
6947 close($f);
6948
6949 if (!$quiet) {
6950 print << "EOM";
6951
6952Wrote EXPERIMENTAL --fix correction(s) to '$newfile'
6953
6954Do _NOT_ trust the results written to this file.
6955Do _NOT_ submit these changes without inspecting them for correctness.
6956
6957This EXPERIMENTAL file is simply a convenience to help rewrite patches.
6958No warranties, expressed or implied...
6959EOM
6960 }
6961 }
6962
6963 if ($quiet == 0) {
6964 print "\n";
6965 if ($clean == 1) {
6966 print "$vname has no obvious style problems and is ready for submission.\n";
6967 } else {
6968 print "$vname has style problems, please review.\n";
6969 }
6970 }
6971 return $clean;
6972}
1#!/usr/bin/perl -w
2# (c) 2001, Dave Jones. (the file handling bit)
3# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit)
4# (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite)
5# (c) 2008-2010 Andy Whitcroft <apw@canonical.com>
6# Licensed under the terms of the GNU GPL License version 2
7
8use strict;
9use POSIX;
10use File::Basename;
11use Cwd 'abs_path';
12use Term::ANSIColor qw(:constants);
13
14my $P = $0;
15my $D = dirname(abs_path($P));
16
17my $V = '0.32';
18
19use Getopt::Long qw(:config no_auto_abbrev);
20
21my $quiet = 0;
22my $tree = 1;
23my $chk_signoff = 1;
24my $chk_patch = 1;
25my $tst_only;
26my $emacs = 0;
27my $terse = 0;
28my $showfile = 0;
29my $file = 0;
30my $git = 0;
31my %git_commits = ();
32my $check = 0;
33my $check_orig = 0;
34my $summary = 1;
35my $mailback = 0;
36my $summary_file = 0;
37my $show_types = 0;
38my $list_types = 0;
39my $fix = 0;
40my $fix_inplace = 0;
41my $root;
42my %debug;
43my %camelcase = ();
44my %use_type = ();
45my @use = ();
46my %ignore_type = ();
47my @ignore = ();
48my $help = 0;
49my $configuration_file = ".checkpatch.conf";
50my $max_line_length = 80;
51my $ignore_perl_version = 0;
52my $minimum_perl_version = 5.10.0;
53my $min_conf_desc_length = 4;
54my $spelling_file = "$D/spelling.txt";
55my $codespell = 0;
56my $codespellfile = "/usr/share/codespell/dictionary.txt";
57my $conststructsfile = "$D/const_structs.checkpatch";
58my $color = 1;
59my $allow_c99_comments = 1;
60
61sub help {
62 my ($exitcode) = @_;
63
64 print << "EOM";
65Usage: $P [OPTION]... [FILE]...
66Version: $V
67
68Options:
69 -q, --quiet quiet
70 --no-tree run without a kernel tree
71 --no-signoff do not check for 'Signed-off-by' line
72 --patch treat FILE as patchfile (default)
73 --emacs emacs compile window format
74 --terse one line per report
75 --showfile emit diffed file position, not input file position
76 -g, --git treat FILE as a single commit or git revision range
77 single git commit with:
78 <rev>
79 <rev>^
80 <rev>~n
81 multiple git commits with:
82 <rev1>..<rev2>
83 <rev1>...<rev2>
84 <rev>-<count>
85 git merges are ignored
86 -f, --file treat FILE as regular source file
87 --subjective, --strict enable more subjective tests
88 --list-types list the possible message types
89 --types TYPE(,TYPE2...) show only these comma separated message types
90 --ignore TYPE(,TYPE2...) ignore various comma separated message types
91 --show-types show the specific message type in the output
92 --max-line-length=n set the maximum line length, if exceeded, warn
93 --min-conf-desc-length=n set the min description length, if shorter, warn
94 --root=PATH PATH to the kernel tree root
95 --no-summary suppress the per-file summary
96 --mailback only produce a report in case of warnings/errors
97 --summary-file include the filename in summary
98 --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of
99 'values', 'possible', 'type', and 'attr' (default
100 is all off)
101 --test-only=WORD report only warnings/errors containing WORD
102 literally
103 --fix EXPERIMENTAL - may create horrible results
104 If correctable single-line errors exist, create
105 "<inputfile>.EXPERIMENTAL-checkpatch-fixes"
106 with potential errors corrected to the preferred
107 checkpatch style
108 --fix-inplace EXPERIMENTAL - may create horrible results
109 Is the same as --fix, but overwrites the input
110 file. It's your fault if there's no backup or git
111 --ignore-perl-version override checking of perl version. expect
112 runtime errors.
113 --codespell Use the codespell dictionary for spelling/typos
114 (default:/usr/share/codespell/dictionary.txt)
115 --codespellfile Use this codespell dictionary
116 --color Use colors when output is STDOUT (default: on)
117 -h, --help, --version display this help and exit
118
119When FILE is - read standard input.
120EOM
121
122 exit($exitcode);
123}
124
125sub uniq {
126 my %seen;
127 return grep { !$seen{$_}++ } @_;
128}
129
130sub list_types {
131 my ($exitcode) = @_;
132
133 my $count = 0;
134
135 local $/ = undef;
136
137 open(my $script, '<', abs_path($P)) or
138 die "$P: Can't read '$P' $!\n";
139
140 my $text = <$script>;
141 close($script);
142
143 my @types = ();
144 for ($text =~ /\b(?:(?:CHK|WARN|ERROR)\s*\(\s*"([^"]+)")/g) {
145 push (@types, $_);
146 }
147 @types = sort(uniq(@types));
148 print("#\tMessage type\n\n");
149 foreach my $type (@types) {
150 print(++$count . "\t" . $type . "\n");
151 }
152
153 exit($exitcode);
154}
155
156my $conf = which_conf($configuration_file);
157if (-f $conf) {
158 my @conf_args;
159 open(my $conffile, '<', "$conf")
160 or warn "$P: Can't find a readable $configuration_file file $!\n";
161
162 while (<$conffile>) {
163 my $line = $_;
164
165 $line =~ s/\s*\n?$//g;
166 $line =~ s/^\s*//g;
167 $line =~ s/\s+/ /g;
168
169 next if ($line =~ m/^\s*#/);
170 next if ($line =~ m/^\s*$/);
171
172 my @words = split(" ", $line);
173 foreach my $word (@words) {
174 last if ($word =~ m/^#/);
175 push (@conf_args, $word);
176 }
177 }
178 close($conffile);
179 unshift(@ARGV, @conf_args) if @conf_args;
180}
181
182GetOptions(
183 'q|quiet+' => \$quiet,
184 'tree!' => \$tree,
185 'signoff!' => \$chk_signoff,
186 'patch!' => \$chk_patch,
187 'emacs!' => \$emacs,
188 'terse!' => \$terse,
189 'showfile!' => \$showfile,
190 'f|file!' => \$file,
191 'g|git!' => \$git,
192 'subjective!' => \$check,
193 'strict!' => \$check,
194 'ignore=s' => \@ignore,
195 'types=s' => \@use,
196 'show-types!' => \$show_types,
197 'list-types!' => \$list_types,
198 'max-line-length=i' => \$max_line_length,
199 'min-conf-desc-length=i' => \$min_conf_desc_length,
200 'root=s' => \$root,
201 'summary!' => \$summary,
202 'mailback!' => \$mailback,
203 'summary-file!' => \$summary_file,
204 'fix!' => \$fix,
205 'fix-inplace!' => \$fix_inplace,
206 'ignore-perl-version!' => \$ignore_perl_version,
207 'debug=s' => \%debug,
208 'test-only=s' => \$tst_only,
209 'codespell!' => \$codespell,
210 'codespellfile=s' => \$codespellfile,
211 'color!' => \$color,
212 'h|help' => \$help,
213 'version' => \$help
214) or help(1);
215
216help(0) if ($help);
217
218list_types(0) if ($list_types);
219
220$fix = 1 if ($fix_inplace);
221$check_orig = $check;
222
223my $exit = 0;
224
225if ($^V && $^V lt $minimum_perl_version) {
226 printf "$P: requires at least perl version %vd\n", $minimum_perl_version;
227 if (!$ignore_perl_version) {
228 exit(1);
229 }
230}
231
232#if no filenames are given, push '-' to read patch from stdin
233if ($#ARGV < 0) {
234 push(@ARGV, '-');
235}
236
237sub hash_save_array_words {
238 my ($hashRef, $arrayRef) = @_;
239
240 my @array = split(/,/, join(',', @$arrayRef));
241 foreach my $word (@array) {
242 $word =~ s/\s*\n?$//g;
243 $word =~ s/^\s*//g;
244 $word =~ s/\s+/ /g;
245 $word =~ tr/[a-z]/[A-Z]/;
246
247 next if ($word =~ m/^\s*#/);
248 next if ($word =~ m/^\s*$/);
249
250 $hashRef->{$word}++;
251 }
252}
253
254sub hash_show_words {
255 my ($hashRef, $prefix) = @_;
256
257 if (keys %$hashRef) {
258 print "\nNOTE: $prefix message types:";
259 foreach my $word (sort keys %$hashRef) {
260 print " $word";
261 }
262 print "\n";
263 }
264}
265
266hash_save_array_words(\%ignore_type, \@ignore);
267hash_save_array_words(\%use_type, \@use);
268
269my $dbg_values = 0;
270my $dbg_possible = 0;
271my $dbg_type = 0;
272my $dbg_attr = 0;
273for my $key (keys %debug) {
274 ## no critic
275 eval "\${dbg_$key} = '$debug{$key}';";
276 die "$@" if ($@);
277}
278
279my $rpt_cleaners = 0;
280
281if ($terse) {
282 $emacs = 1;
283 $quiet++;
284}
285
286if ($tree) {
287 if (defined $root) {
288 if (!top_of_kernel_tree($root)) {
289 die "$P: $root: --root does not point at a valid tree\n";
290 }
291 } else {
292 if (top_of_kernel_tree('.')) {
293 $root = '.';
294 } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ &&
295 top_of_kernel_tree($1)) {
296 $root = $1;
297 }
298 }
299
300 if (!defined $root) {
301 print "Must be run from the top-level dir. of a kernel tree\n";
302 exit(2);
303 }
304}
305
306my $emitted_corrupt = 0;
307
308our $Ident = qr{
309 [A-Za-z_][A-Za-z\d_]*
310 (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)*
311 }x;
312our $Storage = qr{extern|static|asmlinkage};
313our $Sparse = qr{
314 __user|
315 __kernel|
316 __force|
317 __iomem|
318 __must_check|
319 __init_refok|
320 __kprobes|
321 __ref|
322 __rcu|
323 __private
324 }x;
325our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)};
326our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)};
327our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
328our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
329our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};
330
331# Notes to $Attribute:
332# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
333our $Attribute = qr{
334 const|
335 __percpu|
336 __nocast|
337 __safe|
338 __bitwise|
339 __packed__|
340 __packed2__|
341 __naked|
342 __maybe_unused|
343 __always_unused|
344 __noreturn|
345 __used|
346 __cold|
347 __pure|
348 __noclone|
349 __deprecated|
350 __read_mostly|
351 __kprobes|
352 $InitAttribute|
353 ____cacheline_aligned|
354 ____cacheline_aligned_in_smp|
355 ____cacheline_internodealigned_in_smp|
356 __weak
357 }x;
358our $Modifier;
359our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__};
360our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
361our $Lval = qr{$Ident(?:$Member)*};
362
363our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u};
364our $Binary = qr{(?i)0b[01]+$Int_type?};
365our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?};
366our $Int = qr{[0-9]+$Int_type?};
367our $Octal = qr{0[0-7]+$Int_type?};
368our $String = qr{"[X\t]*"};
369our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?};
370our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?};
371our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?};
372our $Float = qr{$Float_hex|$Float_dec|$Float_int};
373our $Constant = qr{$Float|$Binary|$Octal|$Hex|$Int};
374our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=};
375our $Compare = qr{<=|>=|==|!=|<|(?<!-)>};
376our $Arithmetic = qr{\+|-|\*|\/|%};
377our $Operators = qr{
378 <=|>=|==|!=|
379 =>|->|<<|>>|<|>|!|~|
380 &&|\|\||,|\^|\+\+|--|&|\||$Arithmetic
381 }x;
382
383our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x;
384
385our $BasicType;
386our $NonptrType;
387our $NonptrTypeMisordered;
388our $NonptrTypeWithAttr;
389our $Type;
390our $TypeMisordered;
391our $Declare;
392our $DeclareMisordered;
393
394our $NON_ASCII_UTF8 = qr{
395 [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
396 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
397 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
398 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
399 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
400 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
401 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
402}x;
403
404our $UTF8 = qr{
405 [\x09\x0A\x0D\x20-\x7E] # ASCII
406 | $NON_ASCII_UTF8
407}x;
408
409our $typeC99Typedefs = qr{(?:__)?(?:[us]_?)?int_?(?:8|16|32|64)_t};
410our $typeOtherOSTypedefs = qr{(?x:
411 u_(?:char|short|int|long) | # bsd
412 u(?:nchar|short|int|long) # sysv
413)};
414our $typeKernelTypedefs = qr{(?x:
415 (?:__)?(?:u|s|be|le)(?:8|16|32|64)|
416 atomic_t
417)};
418our $typeTypedefs = qr{(?x:
419 $typeC99Typedefs\b|
420 $typeOtherOSTypedefs\b|
421 $typeKernelTypedefs\b
422)};
423
424our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b};
425
426our $logFunctions = qr{(?x:
427 printk(?:_ratelimited|_once|)|
428 (?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)|
429 WARN(?:_RATELIMIT|_ONCE|)|
430 panic|
431 MODULE_[A-Z_]+|
432 seq_vprintf|seq_printf|seq_puts
433)};
434
435our $signature_tags = qr{(?xi:
436 Signed-off-by:|
437 Acked-by:|
438 Tested-by:|
439 Reviewed-by:|
440 Reported-by:|
441 Suggested-by:|
442 To:|
443 Cc:
444)};
445
446our @typeListMisordered = (
447 qr{char\s+(?:un)?signed},
448 qr{int\s+(?:(?:un)?signed\s+)?short\s},
449 qr{int\s+short(?:\s+(?:un)?signed)},
450 qr{short\s+int(?:\s+(?:un)?signed)},
451 qr{(?:un)?signed\s+int\s+short},
452 qr{short\s+(?:un)?signed},
453 qr{long\s+int\s+(?:un)?signed},
454 qr{int\s+long\s+(?:un)?signed},
455 qr{long\s+(?:un)?signed\s+int},
456 qr{int\s+(?:un)?signed\s+long},
457 qr{int\s+(?:un)?signed},
458 qr{int\s+long\s+long\s+(?:un)?signed},
459 qr{long\s+long\s+int\s+(?:un)?signed},
460 qr{long\s+long\s+(?:un)?signed\s+int},
461 qr{long\s+long\s+(?:un)?signed},
462 qr{long\s+(?:un)?signed},
463);
464
465our @typeList = (
466 qr{void},
467 qr{(?:(?:un)?signed\s+)?char},
468 qr{(?:(?:un)?signed\s+)?short\s+int},
469 qr{(?:(?:un)?signed\s+)?short},
470 qr{(?:(?:un)?signed\s+)?int},
471 qr{(?:(?:un)?signed\s+)?long\s+int},
472 qr{(?:(?:un)?signed\s+)?long\s+long\s+int},
473 qr{(?:(?:un)?signed\s+)?long\s+long},
474 qr{(?:(?:un)?signed\s+)?long},
475 qr{(?:un)?signed},
476 qr{float},
477 qr{double},
478 qr{bool},
479 qr{struct\s+$Ident},
480 qr{union\s+$Ident},
481 qr{enum\s+$Ident},
482 qr{${Ident}_t},
483 qr{${Ident}_handler},
484 qr{${Ident}_handler_fn},
485 @typeListMisordered,
486);
487
488our $C90_int_types = qr{(?x:
489 long\s+long\s+int\s+(?:un)?signed|
490 long\s+long\s+(?:un)?signed\s+int|
491 long\s+long\s+(?:un)?signed|
492 (?:(?:un)?signed\s+)?long\s+long\s+int|
493 (?:(?:un)?signed\s+)?long\s+long|
494 int\s+long\s+long\s+(?:un)?signed|
495 int\s+(?:(?:un)?signed\s+)?long\s+long|
496
497 long\s+int\s+(?:un)?signed|
498 long\s+(?:un)?signed\s+int|
499 long\s+(?:un)?signed|
500 (?:(?:un)?signed\s+)?long\s+int|
501 (?:(?:un)?signed\s+)?long|
502 int\s+long\s+(?:un)?signed|
503 int\s+(?:(?:un)?signed\s+)?long|
504
505 int\s+(?:un)?signed|
506 (?:(?:un)?signed\s+)?int
507)};
508
509our @typeListFile = ();
510our @typeListWithAttr = (
511 @typeList,
512 qr{struct\s+$InitAttribute\s+$Ident},
513 qr{union\s+$InitAttribute\s+$Ident},
514);
515
516our @modifierList = (
517 qr{fastcall},
518);
519our @modifierListFile = ();
520
521our @mode_permission_funcs = (
522 ["module_param", 3],
523 ["module_param_(?:array|named|string)", 4],
524 ["module_param_array_named", 5],
525 ["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2],
526 ["proc_create(?:_data|)", 2],
527 ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2],
528 ["IIO_DEV_ATTR_[A-Z_]+", 1],
529 ["SENSOR_(?:DEVICE_|)ATTR_2", 2],
530 ["SENSOR_TEMPLATE(?:_2|)", 3],
531 ["__ATTR", 2],
532);
533
534#Create a search pattern for all these functions to speed up a loop below
535our $mode_perms_search = "";
536foreach my $entry (@mode_permission_funcs) {
537 $mode_perms_search .= '|' if ($mode_perms_search ne "");
538 $mode_perms_search .= $entry->[0];
539}
540
541our $mode_perms_world_writable = qr{
542 S_IWUGO |
543 S_IWOTH |
544 S_IRWXUGO |
545 S_IALLUGO |
546 0[0-7][0-7][2367]
547}x;
548
549our %mode_permission_string_types = (
550 "S_IRWXU" => 0700,
551 "S_IRUSR" => 0400,
552 "S_IWUSR" => 0200,
553 "S_IXUSR" => 0100,
554 "S_IRWXG" => 0070,
555 "S_IRGRP" => 0040,
556 "S_IWGRP" => 0020,
557 "S_IXGRP" => 0010,
558 "S_IRWXO" => 0007,
559 "S_IROTH" => 0004,
560 "S_IWOTH" => 0002,
561 "S_IXOTH" => 0001,
562 "S_IRWXUGO" => 0777,
563 "S_IRUGO" => 0444,
564 "S_IWUGO" => 0222,
565 "S_IXUGO" => 0111,
566);
567
568#Create a search pattern for all these strings to speed up a loop below
569our $mode_perms_string_search = "";
570foreach my $entry (keys %mode_permission_string_types) {
571 $mode_perms_string_search .= '|' if ($mode_perms_string_search ne "");
572 $mode_perms_string_search .= $entry;
573}
574
575our $allowed_asm_includes = qr{(?x:
576 irq|
577 memory|
578 time|
579 reboot
580)};
581# memory.h: ARM has a custom one
582
583# Load common spelling mistakes and build regular expression list.
584my $misspellings;
585my %spelling_fix;
586
587if (open(my $spelling, '<', $spelling_file)) {
588 while (<$spelling>) {
589 my $line = $_;
590
591 $line =~ s/\s*\n?$//g;
592 $line =~ s/^\s*//g;
593
594 next if ($line =~ m/^\s*#/);
595 next if ($line =~ m/^\s*$/);
596
597 my ($suspect, $fix) = split(/\|\|/, $line);
598
599 $spelling_fix{$suspect} = $fix;
600 }
601 close($spelling);
602} else {
603 warn "No typos will be found - file '$spelling_file': $!\n";
604}
605
606if ($codespell) {
607 if (open(my $spelling, '<', $codespellfile)) {
608 while (<$spelling>) {
609 my $line = $_;
610
611 $line =~ s/\s*\n?$//g;
612 $line =~ s/^\s*//g;
613
614 next if ($line =~ m/^\s*#/);
615 next if ($line =~ m/^\s*$/);
616 next if ($line =~ m/, disabled/i);
617
618 $line =~ s/,.*$//;
619
620 my ($suspect, $fix) = split(/->/, $line);
621
622 $spelling_fix{$suspect} = $fix;
623 }
624 close($spelling);
625 } else {
626 warn "No codespell typos will be found - file '$codespellfile': $!\n";
627 }
628}
629
630$misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix;
631
632my $const_structs = "";
633if (open(my $conststructs, '<', $conststructsfile)) {
634 while (<$conststructs>) {
635 my $line = $_;
636
637 $line =~ s/\s*\n?$//g;
638 $line =~ s/^\s*//g;
639
640 next if ($line =~ m/^\s*#/);
641 next if ($line =~ m/^\s*$/);
642 if ($line =~ /\s/) {
643 print("$conststructsfile: '$line' invalid - ignored\n");
644 next;
645 }
646
647 $const_structs .= '|' if ($const_structs ne "");
648 $const_structs .= $line;
649 }
650 close($conststructsfile);
651} else {
652 warn "No structs that should be const will be found - file '$conststructsfile': $!\n";
653}
654
655sub build_types {
656 my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)";
657 my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)";
658 my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)";
659 my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)";
660 $Modifier = qr{(?:$Attribute|$Sparse|$mods)};
661 $BasicType = qr{
662 (?:$typeTypedefs\b)|
663 (?:${all}\b)
664 }x;
665 $NonptrType = qr{
666 (?:$Modifier\s+|const\s+)*
667 (?:
668 (?:typeof|__typeof__)\s*\([^\)]*\)|
669 (?:$typeTypedefs\b)|
670 (?:${all}\b)
671 )
672 (?:\s+$Modifier|\s+const)*
673 }x;
674 $NonptrTypeMisordered = qr{
675 (?:$Modifier\s+|const\s+)*
676 (?:
677 (?:${Misordered}\b)
678 )
679 (?:\s+$Modifier|\s+const)*
680 }x;
681 $NonptrTypeWithAttr = qr{
682 (?:$Modifier\s+|const\s+)*
683 (?:
684 (?:typeof|__typeof__)\s*\([^\)]*\)|
685 (?:$typeTypedefs\b)|
686 (?:${allWithAttr}\b)
687 )
688 (?:\s+$Modifier|\s+const)*
689 }x;
690 $Type = qr{
691 $NonptrType
692 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
693 (?:\s+$Inline|\s+$Modifier)*
694 }x;
695 $TypeMisordered = qr{
696 $NonptrTypeMisordered
697 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
698 (?:\s+$Inline|\s+$Modifier)*
699 }x;
700 $Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type};
701 $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered};
702}
703build_types();
704
705our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*};
706
707# Using $balanced_parens, $LvalOrFunc, or $FuncArg
708# requires at least perl version v5.10.0
709# Any use must be runtime checked with $^V
710
711our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/;
712our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*};
713our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)};
714
715our $declaration_macros = qr{(?x:
716 (?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,6}\s*\(|
717 (?:$Storage\s+)?LIST_HEAD\s*\(|
718 (?:$Storage\s+)?${Type}\s+uninitialized_var\s*\(
719)};
720
721sub deparenthesize {
722 my ($string) = @_;
723 return "" if (!defined($string));
724
725 while ($string =~ /^\s*\(.*\)\s*$/) {
726 $string =~ s@^\s*\(\s*@@;
727 $string =~ s@\s*\)\s*$@@;
728 }
729
730 $string =~ s@\s+@ @g;
731
732 return $string;
733}
734
735sub seed_camelcase_file {
736 my ($file) = @_;
737
738 return if (!(-f $file));
739
740 local $/;
741
742 open(my $include_file, '<', "$file")
743 or warn "$P: Can't read '$file' $!\n";
744 my $text = <$include_file>;
745 close($include_file);
746
747 my @lines = split('\n', $text);
748
749 foreach my $line (@lines) {
750 next if ($line !~ /(?:[A-Z][a-z]|[a-z][A-Z])/);
751 if ($line =~ /^[ \t]*(?:#[ \t]*define|typedef\s+$Type)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)/) {
752 $camelcase{$1} = 1;
753 } elsif ($line =~ /^\s*$Declare\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[\(\[,;]/) {
754 $camelcase{$1} = 1;
755 } elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[;\{]/) {
756 $camelcase{$1} = 1;
757 }
758 }
759}
760
761sub is_maintained_obsolete {
762 my ($filename) = @_;
763
764 return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl"));
765
766 my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`;
767
768 return $status =~ /obsolete/i;
769}
770
771my $camelcase_seeded = 0;
772sub seed_camelcase_includes {
773 return if ($camelcase_seeded);
774
775 my $files;
776 my $camelcase_cache = "";
777 my @include_files = ();
778
779 $camelcase_seeded = 1;
780
781 if (-e ".git") {
782 my $git_last_include_commit = `git log --no-merges --pretty=format:"%h%n" -1 -- include`;
783 chomp $git_last_include_commit;
784 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit";
785 } else {
786 my $last_mod_date = 0;
787 $files = `find $root/include -name "*.h"`;
788 @include_files = split('\n', $files);
789 foreach my $file (@include_files) {
790 my $date = POSIX::strftime("%Y%m%d%H%M",
791 localtime((stat $file)[9]));
792 $last_mod_date = $date if ($last_mod_date < $date);
793 }
794 $camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date";
795 }
796
797 if ($camelcase_cache ne "" && -f $camelcase_cache) {
798 open(my $camelcase_file, '<', "$camelcase_cache")
799 or warn "$P: Can't read '$camelcase_cache' $!\n";
800 while (<$camelcase_file>) {
801 chomp;
802 $camelcase{$_} = 1;
803 }
804 close($camelcase_file);
805
806 return;
807 }
808
809 if (-e ".git") {
810 $files = `git ls-files "include/*.h"`;
811 @include_files = split('\n', $files);
812 }
813
814 foreach my $file (@include_files) {
815 seed_camelcase_file($file);
816 }
817
818 if ($camelcase_cache ne "") {
819 unlink glob ".checkpatch-camelcase.*";
820 open(my $camelcase_file, '>', "$camelcase_cache")
821 or warn "$P: Can't write '$camelcase_cache' $!\n";
822 foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) {
823 print $camelcase_file ("$_\n");
824 }
825 close($camelcase_file);
826 }
827}
828
829sub git_commit_info {
830 my ($commit, $id, $desc) = @_;
831
832 return ($id, $desc) if ((which("git") eq "") || !(-e ".git"));
833
834 my $output = `git log --no-color --format='%H %s' -1 $commit 2>&1`;
835 $output =~ s/^\s*//gm;
836 my @lines = split("\n", $output);
837
838 return ($id, $desc) if ($#lines < 0);
839
840 if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous\./) {
841# Maybe one day convert this block of bash into something that returns
842# all matching commit ids, but it's very slow...
843#
844# echo "checking commits $1..."
845# git rev-list --remotes | grep -i "^$1" |
846# while read line ; do
847# git log --format='%H %s' -1 $line |
848# echo "commit $(cut -c 1-12,41-)"
849# done
850 } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./) {
851 } else {
852 $id = substr($lines[0], 0, 12);
853 $desc = substr($lines[0], 41);
854 }
855
856 return ($id, $desc);
857}
858
859$chk_signoff = 0 if ($file);
860
861my @rawlines = ();
862my @lines = ();
863my @fixed = ();
864my @fixed_inserted = ();
865my @fixed_deleted = ();
866my $fixlinenr = -1;
867
868# If input is git commits, extract all commits from the commit expressions.
869# For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'.
870die "$P: No git repository found\n" if ($git && !-e ".git");
871
872if ($git) {
873 my @commits = ();
874 foreach my $commit_expr (@ARGV) {
875 my $git_range;
876 if ($commit_expr =~ m/^(.*)-(\d+)$/) {
877 $git_range = "-$2 $1";
878 } elsif ($commit_expr =~ m/\.\./) {
879 $git_range = "$commit_expr";
880 } else {
881 $git_range = "-1 $commit_expr";
882 }
883 my $lines = `git log --no-color --no-merges --pretty=format:'%H %s' $git_range`;
884 foreach my $line (split(/\n/, $lines)) {
885 $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/;
886 next if (!defined($1) || !defined($2));
887 my $sha1 = $1;
888 my $subject = $2;
889 unshift(@commits, $sha1);
890 $git_commits{$sha1} = $subject;
891 }
892 }
893 die "$P: no git commits after extraction!\n" if (@commits == 0);
894 @ARGV = @commits;
895}
896
897my $vname;
898for my $filename (@ARGV) {
899 my $FILE;
900 if ($git) {
901 open($FILE, '-|', "git format-patch -M --stdout -1 $filename") ||
902 die "$P: $filename: git format-patch failed - $!\n";
903 } elsif ($file) {
904 open($FILE, '-|', "diff -u /dev/null $filename") ||
905 die "$P: $filename: diff failed - $!\n";
906 } elsif ($filename eq '-') {
907 open($FILE, '<&STDIN');
908 } else {
909 open($FILE, '<', "$filename") ||
910 die "$P: $filename: open failed - $!\n";
911 }
912 if ($filename eq '-') {
913 $vname = 'Your patch';
914 } elsif ($git) {
915 $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")';
916 } else {
917 $vname = $filename;
918 }
919 while (<$FILE>) {
920 chomp;
921 push(@rawlines, $_);
922 }
923 close($FILE);
924
925 if ($#ARGV > 0 && $quiet == 0) {
926 print '-' x length($vname) . "\n";
927 print "$vname\n";
928 print '-' x length($vname) . "\n";
929 }
930
931 if (!process($filename)) {
932 $exit = 1;
933 }
934 @rawlines = ();
935 @lines = ();
936 @fixed = ();
937 @fixed_inserted = ();
938 @fixed_deleted = ();
939 $fixlinenr = -1;
940 @modifierListFile = ();
941 @typeListFile = ();
942 build_types();
943}
944
945if (!$quiet) {
946 hash_show_words(\%use_type, "Used");
947 hash_show_words(\%ignore_type, "Ignored");
948
949 if ($^V lt 5.10.0) {
950 print << "EOM"
951
952NOTE: perl $^V is not modern enough to detect all possible issues.
953 An upgrade to at least perl v5.10.0 is suggested.
954EOM
955 }
956 if ($exit) {
957 print << "EOM"
958
959NOTE: If any of the errors are false positives, please report
960 them to the maintainer, see CHECKPATCH in MAINTAINERS.
961EOM
962 }
963}
964
965exit($exit);
966
967sub top_of_kernel_tree {
968 my ($root) = @_;
969
970 my @tree_check = (
971 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile",
972 "README", "Documentation", "arch", "include", "drivers",
973 "fs", "init", "ipc", "kernel", "lib", "scripts",
974 );
975
976 foreach my $check (@tree_check) {
977 if (! -e $root . '/' . $check) {
978 return 0;
979 }
980 }
981 return 1;
982}
983
984sub parse_email {
985 my ($formatted_email) = @_;
986
987 my $name = "";
988 my $address = "";
989 my $comment = "";
990
991 if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) {
992 $name = $1;
993 $address = $2;
994 $comment = $3 if defined $3;
995 } elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) {
996 $address = $1;
997 $comment = $2 if defined $2;
998 } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) {
999 $address = $1;
1000 $comment = $2 if defined $2;
1001 $formatted_email =~ s/$address.*$//;
1002 $name = $formatted_email;
1003 $name = trim($name);
1004 $name =~ s/^\"|\"$//g;
1005 # If there's a name left after stripping spaces and
1006 # leading quotes, and the address doesn't have both
1007 # leading and trailing angle brackets, the address
1008 # is invalid. ie:
1009 # "joe smith joe@smith.com" bad
1010 # "joe smith <joe@smith.com" bad
1011 if ($name ne "" && $address !~ /^<[^>]+>$/) {
1012 $name = "";
1013 $address = "";
1014 $comment = "";
1015 }
1016 }
1017
1018 $name = trim($name);
1019 $name =~ s/^\"|\"$//g;
1020 $address = trim($address);
1021 $address =~ s/^\<|\>$//g;
1022
1023 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1024 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1025 $name = "\"$name\"";
1026 }
1027
1028 return ($name, $address, $comment);
1029}
1030
1031sub format_email {
1032 my ($name, $address) = @_;
1033
1034 my $formatted_email;
1035
1036 $name = trim($name);
1037 $name =~ s/^\"|\"$//g;
1038 $address = trim($address);
1039
1040 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars
1041 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes
1042 $name = "\"$name\"";
1043 }
1044
1045 if ("$name" eq "") {
1046 $formatted_email = "$address";
1047 } else {
1048 $formatted_email = "$name <$address>";
1049 }
1050
1051 return $formatted_email;
1052}
1053
1054sub which {
1055 my ($bin) = @_;
1056
1057 foreach my $path (split(/:/, $ENV{PATH})) {
1058 if (-e "$path/$bin") {
1059 return "$path/$bin";
1060 }
1061 }
1062
1063 return "";
1064}
1065
1066sub which_conf {
1067 my ($conf) = @_;
1068
1069 foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1070 if (-e "$path/$conf") {
1071 return "$path/$conf";
1072 }
1073 }
1074
1075 return "";
1076}
1077
1078sub expand_tabs {
1079 my ($str) = @_;
1080
1081 my $res = '';
1082 my $n = 0;
1083 for my $c (split(//, $str)) {
1084 if ($c eq "\t") {
1085 $res .= ' ';
1086 $n++;
1087 for (; ($n % 8) != 0; $n++) {
1088 $res .= ' ';
1089 }
1090 next;
1091 }
1092 $res .= $c;
1093 $n++;
1094 }
1095
1096 return $res;
1097}
1098sub copy_spacing {
1099 (my $res = shift) =~ tr/\t/ /c;
1100 return $res;
1101}
1102
1103sub line_stats {
1104 my ($line) = @_;
1105
1106 # Drop the diff line leader and expand tabs
1107 $line =~ s/^.//;
1108 $line = expand_tabs($line);
1109
1110 # Pick the indent from the front of the line.
1111 my ($white) = ($line =~ /^(\s*)/);
1112
1113 return (length($line), length($white));
1114}
1115
1116my $sanitise_quote = '';
1117
1118sub sanitise_line_reset {
1119 my ($in_comment) = @_;
1120
1121 if ($in_comment) {
1122 $sanitise_quote = '*/';
1123 } else {
1124 $sanitise_quote = '';
1125 }
1126}
1127sub sanitise_line {
1128 my ($line) = @_;
1129
1130 my $res = '';
1131 my $l = '';
1132
1133 my $qlen = 0;
1134 my $off = 0;
1135 my $c;
1136
1137 # Always copy over the diff marker.
1138 $res = substr($line, 0, 1);
1139
1140 for ($off = 1; $off < length($line); $off++) {
1141 $c = substr($line, $off, 1);
1142
1143 # Comments we are wacking completly including the begin
1144 # and end, all to $;.
1145 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') {
1146 $sanitise_quote = '*/';
1147
1148 substr($res, $off, 2, "$;$;");
1149 $off++;
1150 next;
1151 }
1152 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') {
1153 $sanitise_quote = '';
1154 substr($res, $off, 2, "$;$;");
1155 $off++;
1156 next;
1157 }
1158 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') {
1159 $sanitise_quote = '//';
1160
1161 substr($res, $off, 2, $sanitise_quote);
1162 $off++;
1163 next;
1164 }
1165
1166 # A \ in a string means ignore the next character.
1167 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') &&
1168 $c eq "\\") {
1169 substr($res, $off, 2, 'XX');
1170 $off++;
1171 next;
1172 }
1173 # Regular quotes.
1174 if ($c eq "'" || $c eq '"') {
1175 if ($sanitise_quote eq '') {
1176 $sanitise_quote = $c;
1177
1178 substr($res, $off, 1, $c);
1179 next;
1180 } elsif ($sanitise_quote eq $c) {
1181 $sanitise_quote = '';
1182 }
1183 }
1184
1185 #print "c<$c> SQ<$sanitise_quote>\n";
1186 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") {
1187 substr($res, $off, 1, $;);
1188 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") {
1189 substr($res, $off, 1, $;);
1190 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") {
1191 substr($res, $off, 1, 'X');
1192 } else {
1193 substr($res, $off, 1, $c);
1194 }
1195 }
1196
1197 if ($sanitise_quote eq '//') {
1198 $sanitise_quote = '';
1199 }
1200
1201 # The pathname on a #include may be surrounded by '<' and '>'.
1202 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) {
1203 my $clean = 'X' x length($1);
1204 $res =~ s@\<.*\>@<$clean>@;
1205
1206 # The whole of a #error is a string.
1207 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) {
1208 my $clean = 'X' x length($1);
1209 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@;
1210 }
1211
1212 if ($allow_c99_comments && $res =~ m@(//.*$)@) {
1213 my $match = $1;
1214 $res =~ s/\Q$match\E/"$;" x length($match)/e;
1215 }
1216
1217 return $res;
1218}
1219
1220sub get_quoted_string {
1221 my ($line, $rawline) = @_;
1222
1223 return "" if ($line !~ m/($String)/g);
1224 return substr($rawline, $-[0], $+[0] - $-[0]);
1225}
1226
1227sub ctx_statement_block {
1228 my ($linenr, $remain, $off) = @_;
1229 my $line = $linenr - 1;
1230 my $blk = '';
1231 my $soff = $off;
1232 my $coff = $off - 1;
1233 my $coff_set = 0;
1234
1235 my $loff = 0;
1236
1237 my $type = '';
1238 my $level = 0;
1239 my @stack = ();
1240 my $p;
1241 my $c;
1242 my $len = 0;
1243
1244 my $remainder;
1245 while (1) {
1246 @stack = (['', 0]) if ($#stack == -1);
1247
1248 #warn "CSB: blk<$blk> remain<$remain>\n";
1249 # If we are about to drop off the end, pull in more
1250 # context.
1251 if ($off >= $len) {
1252 for (; $remain > 0; $line++) {
1253 last if (!defined $lines[$line]);
1254 next if ($lines[$line] =~ /^-/);
1255 $remain--;
1256 $loff = $len;
1257 $blk .= $lines[$line] . "\n";
1258 $len = length($blk);
1259 $line++;
1260 last;
1261 }
1262 # Bail if there is no further context.
1263 #warn "CSB: blk<$blk> off<$off> len<$len>\n";
1264 if ($off >= $len) {
1265 last;
1266 }
1267 if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) {
1268 $level++;
1269 $type = '#';
1270 }
1271 }
1272 $p = $c;
1273 $c = substr($blk, $off, 1);
1274 $remainder = substr($blk, $off);
1275
1276 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n";
1277
1278 # Handle nested #if/#else.
1279 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) {
1280 push(@stack, [ $type, $level ]);
1281 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) {
1282 ($type, $level) = @{$stack[$#stack - 1]};
1283 } elsif ($remainder =~ /^#\s*endif\b/) {
1284 ($type, $level) = @{pop(@stack)};
1285 }
1286
1287 # Statement ends at the ';' or a close '}' at the
1288 # outermost level.
1289 if ($level == 0 && $c eq ';') {
1290 last;
1291 }
1292
1293 # An else is really a conditional as long as its not else if
1294 if ($level == 0 && $coff_set == 0 &&
1295 (!defined($p) || $p =~ /(?:\s|\}|\+)/) &&
1296 $remainder =~ /^(else)(?:\s|{)/ &&
1297 $remainder !~ /^else\s+if\b/) {
1298 $coff = $off + length($1) - 1;
1299 $coff_set = 1;
1300 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n";
1301 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n";
1302 }
1303
1304 if (($type eq '' || $type eq '(') && $c eq '(') {
1305 $level++;
1306 $type = '(';
1307 }
1308 if ($type eq '(' && $c eq ')') {
1309 $level--;
1310 $type = ($level != 0)? '(' : '';
1311
1312 if ($level == 0 && $coff < $soff) {
1313 $coff = $off;
1314 $coff_set = 1;
1315 #warn "CSB: mark coff<$coff>\n";
1316 }
1317 }
1318 if (($type eq '' || $type eq '{') && $c eq '{') {
1319 $level++;
1320 $type = '{';
1321 }
1322 if ($type eq '{' && $c eq '}') {
1323 $level--;
1324 $type = ($level != 0)? '{' : '';
1325
1326 if ($level == 0) {
1327 if (substr($blk, $off + 1, 1) eq ';') {
1328 $off++;
1329 }
1330 last;
1331 }
1332 }
1333 # Preprocessor commands end at the newline unless escaped.
1334 if ($type eq '#' && $c eq "\n" && $p ne "\\") {
1335 $level--;
1336 $type = '';
1337 $off++;
1338 last;
1339 }
1340 $off++;
1341 }
1342 # We are truly at the end, so shuffle to the next line.
1343 if ($off == $len) {
1344 $loff = $len + 1;
1345 $line++;
1346 $remain--;
1347 }
1348
1349 my $statement = substr($blk, $soff, $off - $soff + 1);
1350 my $condition = substr($blk, $soff, $coff - $soff + 1);
1351
1352 #warn "STATEMENT<$statement>\n";
1353 #warn "CONDITION<$condition>\n";
1354
1355 #print "coff<$coff> soff<$off> loff<$loff>\n";
1356
1357 return ($statement, $condition,
1358 $line, $remain + 1, $off - $loff + 1, $level);
1359}
1360
1361sub statement_lines {
1362 my ($stmt) = @_;
1363
1364 # Strip the diff line prefixes and rip blank lines at start and end.
1365 $stmt =~ s/(^|\n)./$1/g;
1366 $stmt =~ s/^\s*//;
1367 $stmt =~ s/\s*$//;
1368
1369 my @stmt_lines = ($stmt =~ /\n/g);
1370
1371 return $#stmt_lines + 2;
1372}
1373
1374sub statement_rawlines {
1375 my ($stmt) = @_;
1376
1377 my @stmt_lines = ($stmt =~ /\n/g);
1378
1379 return $#stmt_lines + 2;
1380}
1381
1382sub statement_block_size {
1383 my ($stmt) = @_;
1384
1385 $stmt =~ s/(^|\n)./$1/g;
1386 $stmt =~ s/^\s*{//;
1387 $stmt =~ s/}\s*$//;
1388 $stmt =~ s/^\s*//;
1389 $stmt =~ s/\s*$//;
1390
1391 my @stmt_lines = ($stmt =~ /\n/g);
1392 my @stmt_statements = ($stmt =~ /;/g);
1393
1394 my $stmt_lines = $#stmt_lines + 2;
1395 my $stmt_statements = $#stmt_statements + 1;
1396
1397 if ($stmt_lines > $stmt_statements) {
1398 return $stmt_lines;
1399 } else {
1400 return $stmt_statements;
1401 }
1402}
1403
1404sub ctx_statement_full {
1405 my ($linenr, $remain, $off) = @_;
1406 my ($statement, $condition, $level);
1407
1408 my (@chunks);
1409
1410 # Grab the first conditional/block pair.
1411 ($statement, $condition, $linenr, $remain, $off, $level) =
1412 ctx_statement_block($linenr, $remain, $off);
1413 #print "F: c<$condition> s<$statement> remain<$remain>\n";
1414 push(@chunks, [ $condition, $statement ]);
1415 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) {
1416 return ($level, $linenr, @chunks);
1417 }
1418
1419 # Pull in the following conditional/block pairs and see if they
1420 # could continue the statement.
1421 for (;;) {
1422 ($statement, $condition, $linenr, $remain, $off, $level) =
1423 ctx_statement_block($linenr, $remain, $off);
1424 #print "C: c<$condition> s<$statement> remain<$remain>\n";
1425 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s));
1426 #print "C: push\n";
1427 push(@chunks, [ $condition, $statement ]);
1428 }
1429
1430 return ($level, $linenr, @chunks);
1431}
1432
1433sub ctx_block_get {
1434 my ($linenr, $remain, $outer, $open, $close, $off) = @_;
1435 my $line;
1436 my $start = $linenr - 1;
1437 my $blk = '';
1438 my @o;
1439 my @c;
1440 my @res = ();
1441
1442 my $level = 0;
1443 my @stack = ($level);
1444 for ($line = $start; $remain > 0; $line++) {
1445 next if ($rawlines[$line] =~ /^-/);
1446 $remain--;
1447
1448 $blk .= $rawlines[$line];
1449
1450 # Handle nested #if/#else.
1451 if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) {
1452 push(@stack, $level);
1453 } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) {
1454 $level = $stack[$#stack - 1];
1455 } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) {
1456 $level = pop(@stack);
1457 }
1458
1459 foreach my $c (split(//, $lines[$line])) {
1460 ##print "C<$c>L<$level><$open$close>O<$off>\n";
1461 if ($off > 0) {
1462 $off--;
1463 next;
1464 }
1465
1466 if ($c eq $close && $level > 0) {
1467 $level--;
1468 last if ($level == 0);
1469 } elsif ($c eq $open) {
1470 $level++;
1471 }
1472 }
1473
1474 if (!$outer || $level <= 1) {
1475 push(@res, $rawlines[$line]);
1476 }
1477
1478 last if ($level == 0);
1479 }
1480
1481 return ($level, @res);
1482}
1483sub ctx_block_outer {
1484 my ($linenr, $remain) = @_;
1485
1486 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0);
1487 return @r;
1488}
1489sub ctx_block {
1490 my ($linenr, $remain) = @_;
1491
1492 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1493 return @r;
1494}
1495sub ctx_statement {
1496 my ($linenr, $remain, $off) = @_;
1497
1498 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1499 return @r;
1500}
1501sub ctx_block_level {
1502 my ($linenr, $remain) = @_;
1503
1504 return ctx_block_get($linenr, $remain, 0, '{', '}', 0);
1505}
1506sub ctx_statement_level {
1507 my ($linenr, $remain, $off) = @_;
1508
1509 return ctx_block_get($linenr, $remain, 0, '(', ')', $off);
1510}
1511
1512sub ctx_locate_comment {
1513 my ($first_line, $end_line) = @_;
1514
1515 # Catch a comment on the end of the line itself.
1516 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@);
1517 return $current_comment if (defined $current_comment);
1518
1519 # Look through the context and try and figure out if there is a
1520 # comment.
1521 my $in_comment = 0;
1522 $current_comment = '';
1523 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) {
1524 my $line = $rawlines[$linenr - 1];
1525 #warn " $line\n";
1526 if ($linenr == $first_line and $line =~ m@^.\s*\*@) {
1527 $in_comment = 1;
1528 }
1529 if ($line =~ m@/\*@) {
1530 $in_comment = 1;
1531 }
1532 if (!$in_comment && $current_comment ne '') {
1533 $current_comment = '';
1534 }
1535 $current_comment .= $line . "\n" if ($in_comment);
1536 if ($line =~ m@\*/@) {
1537 $in_comment = 0;
1538 }
1539 }
1540
1541 chomp($current_comment);
1542 return($current_comment);
1543}
1544sub ctx_has_comment {
1545 my ($first_line, $end_line) = @_;
1546 my $cmt = ctx_locate_comment($first_line, $end_line);
1547
1548 ##print "LINE: $rawlines[$end_line - 1 ]\n";
1549 ##print "CMMT: $cmt\n";
1550
1551 return ($cmt ne '');
1552}
1553
1554sub raw_line {
1555 my ($linenr, $cnt) = @_;
1556
1557 my $offset = $linenr - 1;
1558 $cnt++;
1559
1560 my $line;
1561 while ($cnt) {
1562 $line = $rawlines[$offset++];
1563 next if (defined($line) && $line =~ /^-/);
1564 $cnt--;
1565 }
1566
1567 return $line;
1568}
1569
1570sub cat_vet {
1571 my ($vet) = @_;
1572 my ($res, $coded);
1573
1574 $res = '';
1575 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) {
1576 $res .= $1;
1577 if ($2 ne '') {
1578 $coded = sprintf("^%c", unpack('C', $2) + 64);
1579 $res .= $coded;
1580 }
1581 }
1582 $res =~ s/$/\$/;
1583
1584 return $res;
1585}
1586
1587my $av_preprocessor = 0;
1588my $av_pending;
1589my @av_paren_type;
1590my $av_pend_colon;
1591
1592sub annotate_reset {
1593 $av_preprocessor = 0;
1594 $av_pending = '_';
1595 @av_paren_type = ('E');
1596 $av_pend_colon = 'O';
1597}
1598
1599sub annotate_values {
1600 my ($stream, $type) = @_;
1601
1602 my $res;
1603 my $var = '_' x length($stream);
1604 my $cur = $stream;
1605
1606 print "$stream\n" if ($dbg_values > 1);
1607
1608 while (length($cur)) {
1609 @av_paren_type = ('E') if ($#av_paren_type < 0);
1610 print " <" . join('', @av_paren_type) .
1611 "> <$type> <$av_pending>" if ($dbg_values > 1);
1612 if ($cur =~ /^(\s+)/o) {
1613 print "WS($1)\n" if ($dbg_values > 1);
1614 if ($1 =~ /\n/ && $av_preprocessor) {
1615 $type = pop(@av_paren_type);
1616 $av_preprocessor = 0;
1617 }
1618
1619 } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') {
1620 print "CAST($1)\n" if ($dbg_values > 1);
1621 push(@av_paren_type, $type);
1622 $type = 'c';
1623
1624 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) {
1625 print "DECLARE($1)\n" if ($dbg_values > 1);
1626 $type = 'T';
1627
1628 } elsif ($cur =~ /^($Modifier)\s*/) {
1629 print "MODIFIER($1)\n" if ($dbg_values > 1);
1630 $type = 'T';
1631
1632 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) {
1633 print "DEFINE($1,$2)\n" if ($dbg_values > 1);
1634 $av_preprocessor = 1;
1635 push(@av_paren_type, $type);
1636 if ($2 ne '') {
1637 $av_pending = 'N';
1638 }
1639 $type = 'E';
1640
1641 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) {
1642 print "UNDEF($1)\n" if ($dbg_values > 1);
1643 $av_preprocessor = 1;
1644 push(@av_paren_type, $type);
1645
1646 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) {
1647 print "PRE_START($1)\n" if ($dbg_values > 1);
1648 $av_preprocessor = 1;
1649
1650 push(@av_paren_type, $type);
1651 push(@av_paren_type, $type);
1652 $type = 'E';
1653
1654 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) {
1655 print "PRE_RESTART($1)\n" if ($dbg_values > 1);
1656 $av_preprocessor = 1;
1657
1658 push(@av_paren_type, $av_paren_type[$#av_paren_type]);
1659
1660 $type = 'E';
1661
1662 } elsif ($cur =~ /^(\#\s*(?:endif))/o) {
1663 print "PRE_END($1)\n" if ($dbg_values > 1);
1664
1665 $av_preprocessor = 1;
1666
1667 # Assume all arms of the conditional end as this
1668 # one does, and continue as if the #endif was not here.
1669 pop(@av_paren_type);
1670 push(@av_paren_type, $type);
1671 $type = 'E';
1672
1673 } elsif ($cur =~ /^(\\\n)/o) {
1674 print "PRECONT($1)\n" if ($dbg_values > 1);
1675
1676 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) {
1677 print "ATTR($1)\n" if ($dbg_values > 1);
1678 $av_pending = $type;
1679 $type = 'N';
1680
1681 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) {
1682 print "SIZEOF($1)\n" if ($dbg_values > 1);
1683 if (defined $2) {
1684 $av_pending = 'V';
1685 }
1686 $type = 'N';
1687
1688 } elsif ($cur =~ /^(if|while|for)\b/o) {
1689 print "COND($1)\n" if ($dbg_values > 1);
1690 $av_pending = 'E';
1691 $type = 'N';
1692
1693 } elsif ($cur =~/^(case)/o) {
1694 print "CASE($1)\n" if ($dbg_values > 1);
1695 $av_pend_colon = 'C';
1696 $type = 'N';
1697
1698 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) {
1699 print "KEYWORD($1)\n" if ($dbg_values > 1);
1700 $type = 'N';
1701
1702 } elsif ($cur =~ /^(\()/o) {
1703 print "PAREN('$1')\n" if ($dbg_values > 1);
1704 push(@av_paren_type, $av_pending);
1705 $av_pending = '_';
1706 $type = 'N';
1707
1708 } elsif ($cur =~ /^(\))/o) {
1709 my $new_type = pop(@av_paren_type);
1710 if ($new_type ne '_') {
1711 $type = $new_type;
1712 print "PAREN('$1') -> $type\n"
1713 if ($dbg_values > 1);
1714 } else {
1715 print "PAREN('$1')\n" if ($dbg_values > 1);
1716 }
1717
1718 } elsif ($cur =~ /^($Ident)\s*\(/o) {
1719 print "FUNC($1)\n" if ($dbg_values > 1);
1720 $type = 'V';
1721 $av_pending = 'V';
1722
1723 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) {
1724 if (defined $2 && $type eq 'C' || $type eq 'T') {
1725 $av_pend_colon = 'B';
1726 } elsif ($type eq 'E') {
1727 $av_pend_colon = 'L';
1728 }
1729 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1);
1730 $type = 'V';
1731
1732 } elsif ($cur =~ /^($Ident|$Constant)/o) {
1733 print "IDENT($1)\n" if ($dbg_values > 1);
1734 $type = 'V';
1735
1736 } elsif ($cur =~ /^($Assignment)/o) {
1737 print "ASSIGN($1)\n" if ($dbg_values > 1);
1738 $type = 'N';
1739
1740 } elsif ($cur =~/^(;|{|})/) {
1741 print "END($1)\n" if ($dbg_values > 1);
1742 $type = 'E';
1743 $av_pend_colon = 'O';
1744
1745 } elsif ($cur =~/^(,)/) {
1746 print "COMMA($1)\n" if ($dbg_values > 1);
1747 $type = 'C';
1748
1749 } elsif ($cur =~ /^(\?)/o) {
1750 print "QUESTION($1)\n" if ($dbg_values > 1);
1751 $type = 'N';
1752
1753 } elsif ($cur =~ /^(:)/o) {
1754 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1);
1755
1756 substr($var, length($res), 1, $av_pend_colon);
1757 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') {
1758 $type = 'E';
1759 } else {
1760 $type = 'N';
1761 }
1762 $av_pend_colon = 'O';
1763
1764 } elsif ($cur =~ /^(\[)/o) {
1765 print "CLOSE($1)\n" if ($dbg_values > 1);
1766 $type = 'N';
1767
1768 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) {
1769 my $variant;
1770
1771 print "OPV($1)\n" if ($dbg_values > 1);
1772 if ($type eq 'V') {
1773 $variant = 'B';
1774 } else {
1775 $variant = 'U';
1776 }
1777
1778 substr($var, length($res), 1, $variant);
1779 $type = 'N';
1780
1781 } elsif ($cur =~ /^($Operators)/o) {
1782 print "OP($1)\n" if ($dbg_values > 1);
1783 if ($1 ne '++' && $1 ne '--') {
1784 $type = 'N';
1785 }
1786
1787 } elsif ($cur =~ /(^.)/o) {
1788 print "C($1)\n" if ($dbg_values > 1);
1789 }
1790 if (defined $1) {
1791 $cur = substr($cur, length($1));
1792 $res .= $type x length($1);
1793 }
1794 }
1795
1796 return ($res, $var);
1797}
1798
1799sub possible {
1800 my ($possible, $line) = @_;
1801 my $notPermitted = qr{(?:
1802 ^(?:
1803 $Modifier|
1804 $Storage|
1805 $Type|
1806 DEFINE_\S+
1807 )$|
1808 ^(?:
1809 goto|
1810 return|
1811 case|
1812 else|
1813 asm|__asm__|
1814 do|
1815 \#|
1816 \#\#|
1817 )(?:\s|$)|
1818 ^(?:typedef|struct|enum)\b
1819 )}x;
1820 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2);
1821 if ($possible !~ $notPermitted) {
1822 # Check for modifiers.
1823 $possible =~ s/\s*$Storage\s*//g;
1824 $possible =~ s/\s*$Sparse\s*//g;
1825 if ($possible =~ /^\s*$/) {
1826
1827 } elsif ($possible =~ /\s/) {
1828 $possible =~ s/\s*$Type\s*//g;
1829 for my $modifier (split(' ', $possible)) {
1830 if ($modifier !~ $notPermitted) {
1831 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible);
1832 push(@modifierListFile, $modifier);
1833 }
1834 }
1835
1836 } else {
1837 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible);
1838 push(@typeListFile, $possible);
1839 }
1840 build_types();
1841 } else {
1842 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1);
1843 }
1844}
1845
1846my $prefix = '';
1847
1848sub show_type {
1849 my ($type) = @_;
1850
1851 return defined $use_type{$type} if (scalar keys %use_type > 0);
1852
1853 return !defined $ignore_type{$type};
1854}
1855
1856sub report {
1857 my ($level, $type, $msg) = @_;
1858
1859 if (!show_type($type) ||
1860 (defined $tst_only && $msg !~ /\Q$tst_only\E/)) {
1861 return 0;
1862 }
1863 my $output = '';
1864 if (-t STDOUT && $color) {
1865 if ($level eq 'ERROR') {
1866 $output .= RED;
1867 } elsif ($level eq 'WARNING') {
1868 $output .= YELLOW;
1869 } else {
1870 $output .= GREEN;
1871 }
1872 }
1873 $output .= $prefix . $level . ':';
1874 if ($show_types) {
1875 $output .= BLUE if (-t STDOUT && $color);
1876 $output .= "$type:";
1877 }
1878 $output .= RESET if (-t STDOUT && $color);
1879 $output .= ' ' . $msg . "\n";
1880
1881 if ($showfile) {
1882 my @lines = split("\n", $output, -1);
1883 splice(@lines, 1, 1);
1884 $output = join("\n", @lines);
1885 }
1886 $output = (split('\n', $output))[0] . "\n" if ($terse);
1887
1888 push(our @report, $output);
1889
1890 return 1;
1891}
1892
1893sub report_dump {
1894 our @report;
1895}
1896
1897sub fixup_current_range {
1898 my ($lineRef, $offset, $length) = @_;
1899
1900 if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) {
1901 my $o = $1;
1902 my $l = $2;
1903 my $no = $o + $offset;
1904 my $nl = $l + $length;
1905 $$lineRef =~ s/\+$o,$l \@\@/\+$no,$nl \@\@/;
1906 }
1907}
1908
1909sub fix_inserted_deleted_lines {
1910 my ($linesRef, $insertedRef, $deletedRef) = @_;
1911
1912 my $range_last_linenr = 0;
1913 my $delta_offset = 0;
1914
1915 my $old_linenr = 0;
1916 my $new_linenr = 0;
1917
1918 my $next_insert = 0;
1919 my $next_delete = 0;
1920
1921 my @lines = ();
1922
1923 my $inserted = @{$insertedRef}[$next_insert++];
1924 my $deleted = @{$deletedRef}[$next_delete++];
1925
1926 foreach my $old_line (@{$linesRef}) {
1927 my $save_line = 1;
1928 my $line = $old_line; #don't modify the array
1929 if ($line =~ /^(?:\+\+\+|\-\-\-)\s+\S+/) { #new filename
1930 $delta_offset = 0;
1931 } elsif ($line =~ /^\@\@ -\d+,\d+ \+\d+,\d+ \@\@/) { #new hunk
1932 $range_last_linenr = $new_linenr;
1933 fixup_current_range(\$line, $delta_offset, 0);
1934 }
1935
1936 while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) {
1937 $deleted = @{$deletedRef}[$next_delete++];
1938 $save_line = 0;
1939 fixup_current_range(\$lines[$range_last_linenr], $delta_offset--, -1);
1940 }
1941
1942 while (defined($inserted) && ${$inserted}{'LINENR'} == $old_linenr) {
1943 push(@lines, ${$inserted}{'LINE'});
1944 $inserted = @{$insertedRef}[$next_insert++];
1945 $new_linenr++;
1946 fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1);
1947 }
1948
1949 if ($save_line) {
1950 push(@lines, $line);
1951 $new_linenr++;
1952 }
1953
1954 $old_linenr++;
1955 }
1956
1957 return @lines;
1958}
1959
1960sub fix_insert_line {
1961 my ($linenr, $line) = @_;
1962
1963 my $inserted = {
1964 LINENR => $linenr,
1965 LINE => $line,
1966 };
1967 push(@fixed_inserted, $inserted);
1968}
1969
1970sub fix_delete_line {
1971 my ($linenr, $line) = @_;
1972
1973 my $deleted = {
1974 LINENR => $linenr,
1975 LINE => $line,
1976 };
1977
1978 push(@fixed_deleted, $deleted);
1979}
1980
1981sub ERROR {
1982 my ($type, $msg) = @_;
1983
1984 if (report("ERROR", $type, $msg)) {
1985 our $clean = 0;
1986 our $cnt_error++;
1987 return 1;
1988 }
1989 return 0;
1990}
1991sub WARN {
1992 my ($type, $msg) = @_;
1993
1994 if (report("WARNING", $type, $msg)) {
1995 our $clean = 0;
1996 our $cnt_warn++;
1997 return 1;
1998 }
1999 return 0;
2000}
2001sub CHK {
2002 my ($type, $msg) = @_;
2003
2004 if ($check && report("CHECK", $type, $msg)) {
2005 our $clean = 0;
2006 our $cnt_chk++;
2007 return 1;
2008 }
2009 return 0;
2010}
2011
2012sub check_absolute_file {
2013 my ($absolute, $herecurr) = @_;
2014 my $file = $absolute;
2015
2016 ##print "absolute<$absolute>\n";
2017
2018 # See if any suffix of this path is a path within the tree.
2019 while ($file =~ s@^[^/]*/@@) {
2020 if (-f "$root/$file") {
2021 ##print "file<$file>\n";
2022 last;
2023 }
2024 }
2025 if (! -f _) {
2026 return 0;
2027 }
2028
2029 # It is, so see if the prefix is acceptable.
2030 my $prefix = $absolute;
2031 substr($prefix, -length($file)) = '';
2032
2033 ##print "prefix<$prefix>\n";
2034 if ($prefix ne ".../") {
2035 WARN("USE_RELATIVE_PATH",
2036 "use relative pathname instead of absolute in changelog text\n" . $herecurr);
2037 }
2038}
2039
2040sub trim {
2041 my ($string) = @_;
2042
2043 $string =~ s/^\s+|\s+$//g;
2044
2045 return $string;
2046}
2047
2048sub ltrim {
2049 my ($string) = @_;
2050
2051 $string =~ s/^\s+//;
2052
2053 return $string;
2054}
2055
2056sub rtrim {
2057 my ($string) = @_;
2058
2059 $string =~ s/\s+$//;
2060
2061 return $string;
2062}
2063
2064sub string_find_replace {
2065 my ($string, $find, $replace) = @_;
2066
2067 $string =~ s/$find/$replace/g;
2068
2069 return $string;
2070}
2071
2072sub tabify {
2073 my ($leading) = @_;
2074
2075 my $source_indent = 8;
2076 my $max_spaces_before_tab = $source_indent - 1;
2077 my $spaces_to_tab = " " x $source_indent;
2078
2079 #convert leading spaces to tabs
2080 1 while $leading =~ s@^([\t]*)$spaces_to_tab@$1\t@g;
2081 #Remove spaces before a tab
2082 1 while $leading =~ s@^([\t]*)( {1,$max_spaces_before_tab})\t@$1\t@g;
2083
2084 return "$leading";
2085}
2086
2087sub pos_last_openparen {
2088 my ($line) = @_;
2089
2090 my $pos = 0;
2091
2092 my $opens = $line =~ tr/\(/\(/;
2093 my $closes = $line =~ tr/\)/\)/;
2094
2095 my $last_openparen = 0;
2096
2097 if (($opens == 0) || ($closes >= $opens)) {
2098 return -1;
2099 }
2100
2101 my $len = length($line);
2102
2103 for ($pos = 0; $pos < $len; $pos++) {
2104 my $string = substr($line, $pos);
2105 if ($string =~ /^($FuncArg|$balanced_parens)/) {
2106 $pos += length($1) - 1;
2107 } elsif (substr($line, $pos, 1) eq '(') {
2108 $last_openparen = $pos;
2109 } elsif (index($string, '(') == -1) {
2110 last;
2111 }
2112 }
2113
2114 return length(expand_tabs(substr($line, 0, $last_openparen))) + 1;
2115}
2116
2117sub process {
2118 my $filename = shift;
2119
2120 my $linenr=0;
2121 my $prevline="";
2122 my $prevrawline="";
2123 my $stashline="";
2124 my $stashrawline="";
2125
2126 my $length;
2127 my $indent;
2128 my $previndent=0;
2129 my $stashindent=0;
2130
2131 our $clean = 1;
2132 my $signoff = 0;
2133 my $is_patch = 0;
2134 my $in_header_lines = $file ? 0 : 1;
2135 my $in_commit_log = 0; #Scanning lines before patch
2136 my $has_commit_log = 0; #Encountered lines before patch
2137 my $commit_log_possible_stack_dump = 0;
2138 my $commit_log_long_line = 0;
2139 my $commit_log_has_diff = 0;
2140 my $reported_maintainer_file = 0;
2141 my $non_utf8_charset = 0;
2142
2143 my $last_blank_line = 0;
2144 my $last_coalesced_string_linenr = -1;
2145
2146 our @report = ();
2147 our $cnt_lines = 0;
2148 our $cnt_error = 0;
2149 our $cnt_warn = 0;
2150 our $cnt_chk = 0;
2151
2152 # Trace the real file/line as we go.
2153 my $realfile = '';
2154 my $realline = 0;
2155 my $realcnt = 0;
2156 my $here = '';
2157 my $in_comment = 0;
2158 my $comment_edge = 0;
2159 my $first_line = 0;
2160 my $p1_prefix = '';
2161
2162 my $prev_values = 'E';
2163
2164 # suppression flags
2165 my %suppress_ifbraces;
2166 my %suppress_whiletrailers;
2167 my %suppress_export;
2168 my $suppress_statement = 0;
2169
2170 my %signatures = ();
2171
2172 # Pre-scan the patch sanitizing the lines.
2173 # Pre-scan the patch looking for any __setup documentation.
2174 #
2175 my @setup_docs = ();
2176 my $setup_docs = 0;
2177
2178 my $camelcase_file_seeded = 0;
2179
2180 sanitise_line_reset();
2181 my $line;
2182 foreach my $rawline (@rawlines) {
2183 $linenr++;
2184 $line = $rawline;
2185
2186 push(@fixed, $rawline) if ($fix);
2187
2188 if ($rawline=~/^\+\+\+\s+(\S+)/) {
2189 $setup_docs = 0;
2190 if ($1 =~ m@Documentation/admin-guide/kernel-parameters.rst$@) {
2191 $setup_docs = 1;
2192 }
2193 #next;
2194 }
2195 if ($rawline=~/^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
2196 $realline=$1-1;
2197 if (defined $2) {
2198 $realcnt=$3+1;
2199 } else {
2200 $realcnt=1+1;
2201 }
2202 $in_comment = 0;
2203
2204 # Guestimate if this is a continuing comment. Run
2205 # the context looking for a comment "edge". If this
2206 # edge is a close comment then we must be in a comment
2207 # at context start.
2208 my $edge;
2209 my $cnt = $realcnt;
2210 for (my $ln = $linenr + 1; $cnt > 0; $ln++) {
2211 next if (defined $rawlines[$ln - 1] &&
2212 $rawlines[$ln - 1] =~ /^-/);
2213 $cnt--;
2214 #print "RAW<$rawlines[$ln - 1]>\n";
2215 last if (!defined $rawlines[$ln - 1]);
2216 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ &&
2217 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) {
2218 ($edge) = $1;
2219 last;
2220 }
2221 }
2222 if (defined $edge && $edge eq '*/') {
2223 $in_comment = 1;
2224 }
2225
2226 # Guestimate if this is a continuing comment. If this
2227 # is the start of a diff block and this line starts
2228 # ' *' then it is very likely a comment.
2229 if (!defined $edge &&
2230 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@)
2231 {
2232 $in_comment = 1;
2233 }
2234
2235 ##print "COMMENT:$in_comment edge<$edge> $rawline\n";
2236 sanitise_line_reset($in_comment);
2237
2238 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) {
2239 # Standardise the strings and chars within the input to
2240 # simplify matching -- only bother with positive lines.
2241 $line = sanitise_line($rawline);
2242 }
2243 push(@lines, $line);
2244
2245 if ($realcnt > 1) {
2246 $realcnt-- if ($line =~ /^(?:\+| |$)/);
2247 } else {
2248 $realcnt = 0;
2249 }
2250
2251 #print "==>$rawline\n";
2252 #print "-->$line\n";
2253
2254 if ($setup_docs && $line =~ /^\+/) {
2255 push(@setup_docs, $line);
2256 }
2257 }
2258
2259 $prefix = '';
2260
2261 $realcnt = 0;
2262 $linenr = 0;
2263 $fixlinenr = -1;
2264 foreach my $line (@lines) {
2265 $linenr++;
2266 $fixlinenr++;
2267 my $sline = $line; #copy of $line
2268 $sline =~ s/$;/ /g; #with comments as spaces
2269
2270 my $rawline = $rawlines[$linenr - 1];
2271
2272#extract the line range in the file after the patch is applied
2273 if (!$in_commit_log &&
2274 $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) {
2275 $is_patch = 1;
2276 $first_line = $linenr + 1;
2277 $realline=$1-1;
2278 if (defined $2) {
2279 $realcnt=$3+1;
2280 } else {
2281 $realcnt=1+1;
2282 }
2283 annotate_reset();
2284 $prev_values = 'E';
2285
2286 %suppress_ifbraces = ();
2287 %suppress_whiletrailers = ();
2288 %suppress_export = ();
2289 $suppress_statement = 0;
2290 next;
2291
2292# track the line number as we move through the hunk, note that
2293# new versions of GNU diff omit the leading space on completely
2294# blank context lines so we need to count that too.
2295 } elsif ($line =~ /^( |\+|$)/) {
2296 $realline++;
2297 $realcnt-- if ($realcnt != 0);
2298
2299 # Measure the line length and indent.
2300 ($length, $indent) = line_stats($rawline);
2301
2302 # Track the previous line.
2303 ($prevline, $stashline) = ($stashline, $line);
2304 ($previndent, $stashindent) = ($stashindent, $indent);
2305 ($prevrawline, $stashrawline) = ($stashrawline, $rawline);
2306
2307 #warn "line<$line>\n";
2308
2309 } elsif ($realcnt == 1) {
2310 $realcnt--;
2311 }
2312
2313 my $hunk_line = ($realcnt != 0);
2314
2315 $here = "#$linenr: " if (!$file);
2316 $here = "#$realline: " if ($file);
2317
2318 my $found_file = 0;
2319 # extract the filename as it passes
2320 if ($line =~ /^diff --git.*?(\S+)$/) {
2321 $realfile = $1;
2322 $realfile =~ s@^([^/]*)/@@ if (!$file);
2323 $in_commit_log = 0;
2324 $found_file = 1;
2325 } elsif ($line =~ /^\+\+\+\s+(\S+)/) {
2326 $realfile = $1;
2327 $realfile =~ s@^([^/]*)/@@ if (!$file);
2328 $in_commit_log = 0;
2329
2330 $p1_prefix = $1;
2331 if (!$file && $tree && $p1_prefix ne '' &&
2332 -e "$root/$p1_prefix") {
2333 WARN("PATCH_PREFIX",
2334 "patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n");
2335 }
2336
2337 if ($realfile =~ m@^include/asm/@) {
2338 ERROR("MODIFIED_INCLUDE_ASM",
2339 "do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n");
2340 }
2341 $found_file = 1;
2342 }
2343
2344#make up the handle for any error we report on this line
2345 if ($showfile) {
2346 $prefix = "$realfile:$realline: "
2347 } elsif ($emacs) {
2348 if ($file) {
2349 $prefix = "$filename:$realline: ";
2350 } else {
2351 $prefix = "$filename:$linenr: ";
2352 }
2353 }
2354
2355 if ($found_file) {
2356 if (is_maintained_obsolete($realfile)) {
2357 WARN("OBSOLETE",
2358 "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy. No unnecessary modifications please.\n");
2359 }
2360 if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) {
2361 $check = 1;
2362 } else {
2363 $check = $check_orig;
2364 }
2365 next;
2366 }
2367
2368 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0);
2369
2370 my $hereline = "$here\n$rawline\n";
2371 my $herecurr = "$here\n$rawline\n";
2372 my $hereprev = "$here\n$prevrawline\n$rawline\n";
2373
2374 $cnt_lines++ if ($realcnt != 0);
2375
2376# Check if the commit log has what seems like a diff which can confuse patch
2377 if ($in_commit_log && !$commit_log_has_diff &&
2378 (($line =~ m@^\s+diff\b.*a/[\w/]+@ &&
2379 $line =~ m@^\s+diff\b.*a/([\w/]+)\s+b/$1\b@) ||
2380 $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ ||
2381 $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) {
2382 ERROR("DIFF_IN_COMMIT_MSG",
2383 "Avoid using diff content in the commit message - patch(1) might not work\n" . $herecurr);
2384 $commit_log_has_diff = 1;
2385 }
2386
2387# Check for incorrect file permissions
2388 if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) {
2389 my $permhere = $here . "FILE: $realfile\n";
2390 if ($realfile !~ m@scripts/@ &&
2391 $realfile !~ /\.(py|pl|awk|sh)$/) {
2392 ERROR("EXECUTE_PERMISSIONS",
2393 "do not set execute permissions for source files\n" . $permhere);
2394 }
2395 }
2396
2397# Check the patch for a signoff:
2398 if ($line =~ /^\s*signed-off-by:/i) {
2399 $signoff++;
2400 $in_commit_log = 0;
2401 }
2402
2403# Check if MAINTAINERS is being updated. If so, there's probably no need to
2404# emit the "does MAINTAINERS need updating?" message on file add/move/delete
2405 if ($line =~ /^\s*MAINTAINERS\s*\|/) {
2406 $reported_maintainer_file = 1;
2407 }
2408
2409# Check signature styles
2410 if (!$in_header_lines &&
2411 $line =~ /^(\s*)([a-z0-9_-]+by:|$signature_tags)(\s*)(.*)/i) {
2412 my $space_before = $1;
2413 my $sign_off = $2;
2414 my $space_after = $3;
2415 my $email = $4;
2416 my $ucfirst_sign_off = ucfirst(lc($sign_off));
2417
2418 if ($sign_off !~ /$signature_tags/) {
2419 WARN("BAD_SIGN_OFF",
2420 "Non-standard signature: $sign_off\n" . $herecurr);
2421 }
2422 if (defined $space_before && $space_before ne "") {
2423 if (WARN("BAD_SIGN_OFF",
2424 "Do not use whitespace before $ucfirst_sign_off\n" . $herecurr) &&
2425 $fix) {
2426 $fixed[$fixlinenr] =
2427 "$ucfirst_sign_off $email";
2428 }
2429 }
2430 if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) {
2431 if (WARN("BAD_SIGN_OFF",
2432 "'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr) &&
2433 $fix) {
2434 $fixed[$fixlinenr] =
2435 "$ucfirst_sign_off $email";
2436 }
2437
2438 }
2439 if (!defined $space_after || $space_after ne " ") {
2440 if (WARN("BAD_SIGN_OFF",
2441 "Use a single space after $ucfirst_sign_off\n" . $herecurr) &&
2442 $fix) {
2443 $fixed[$fixlinenr] =
2444 "$ucfirst_sign_off $email";
2445 }
2446 }
2447
2448 my ($email_name, $email_address, $comment) = parse_email($email);
2449 my $suggested_email = format_email(($email_name, $email_address));
2450 if ($suggested_email eq "") {
2451 ERROR("BAD_SIGN_OFF",
2452 "Unrecognized email address: '$email'\n" . $herecurr);
2453 } else {
2454 my $dequoted = $suggested_email;
2455 $dequoted =~ s/^"//;
2456 $dequoted =~ s/" </ </;
2457 # Don't force email to have quotes
2458 # Allow just an angle bracketed address
2459 if ("$dequoted$comment" ne $email &&
2460 "<$email_address>$comment" ne $email &&
2461 "$suggested_email$comment" ne $email) {
2462 WARN("BAD_SIGN_OFF",
2463 "email address '$email' might be better as '$suggested_email$comment'\n" . $herecurr);
2464 }
2465 }
2466
2467# Check for duplicate signatures
2468 my $sig_nospace = $line;
2469 $sig_nospace =~ s/\s//g;
2470 $sig_nospace = lc($sig_nospace);
2471 if (defined $signatures{$sig_nospace}) {
2472 WARN("BAD_SIGN_OFF",
2473 "Duplicate signature\n" . $herecurr);
2474 } else {
2475 $signatures{$sig_nospace} = 1;
2476 }
2477 }
2478
2479# Check email subject for common tools that don't need to be mentioned
2480 if ($in_header_lines &&
2481 $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) {
2482 WARN("EMAIL_SUBJECT",
2483 "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
2484 }
2485
2486# Check for old stable address
2487 if ($line =~ /^\s*cc:\s*.*<?\bstable\@kernel\.org\b>?.*$/i) {
2488 ERROR("STABLE_ADDRESS",
2489 "The 'stable' address should be 'stable\@vger.kernel.org'\n" . $herecurr);
2490 }
2491
2492# Check for unwanted Gerrit info
2493 if ($in_commit_log && $line =~ /^\s*change-id:/i) {
2494 ERROR("GERRIT_CHANGE_ID",
2495 "Remove Gerrit Change-Id's before submitting upstream.\n" . $herecurr);
2496 }
2497
2498# Check if the commit log is in a possible stack dump
2499 if ($in_commit_log && !$commit_log_possible_stack_dump &&
2500 ($line =~ /^\s*(?:WARNING:|BUG:)/ ||
2501 $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ ||
2502 # timestamp
2503 $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/)) {
2504 # stack dump address
2505 $commit_log_possible_stack_dump = 1;
2506 }
2507
2508# Check for line lengths > 75 in commit log, warn once
2509 if ($in_commit_log && !$commit_log_long_line &&
2510 length($line) > 75 &&
2511 !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ ||
2512 # file delta changes
2513 $line =~ /^\s*(?:[\w\.\-]+\/)++[\w\.\-]+:/ ||
2514 # filename then :
2515 $line =~ /^\s*(?:Fixes:|Link:)/i ||
2516 # A Fixes: or Link: line
2517 $commit_log_possible_stack_dump)) {
2518 WARN("COMMIT_LOG_LONG_LINE",
2519 "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr);
2520 $commit_log_long_line = 1;
2521 }
2522
2523# Reset possible stack dump if a blank line is found
2524 if ($in_commit_log && $commit_log_possible_stack_dump &&
2525 $line =~ /^\s*$/) {
2526 $commit_log_possible_stack_dump = 0;
2527 }
2528
2529# Check for git id commit length and improperly formed commit descriptions
2530 if ($in_commit_log && !$commit_log_possible_stack_dump &&
2531 $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink):/i &&
2532 ($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
2533 ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
2534 $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i &&
2535 $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) {
2536 my $init_char = "c";
2537 my $orig_commit = "";
2538 my $short = 1;
2539 my $long = 0;
2540 my $case = 1;
2541 my $space = 1;
2542 my $hasdesc = 0;
2543 my $hasparens = 0;
2544 my $id = '0123456789ab';
2545 my $orig_desc = "commit description";
2546 my $description = "";
2547
2548 if ($line =~ /\b(c)ommit\s+([0-9a-f]{5,})\b/i) {
2549 $init_char = $1;
2550 $orig_commit = lc($2);
2551 } elsif ($line =~ /\b([0-9a-f]{12,40})\b/i) {
2552 $orig_commit = lc($1);
2553 }
2554
2555 $short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i);
2556 $long = 1 if ($line =~ /\bcommit\s+[0-9a-f]{41,}/i);
2557 $space = 0 if ($line =~ /\bcommit [0-9a-f]/i);
2558 $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/);
2559 if ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)"\)/i) {
2560 $orig_desc = $1;
2561 $hasparens = 1;
2562 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s*$/i &&
2563 defined $rawlines[$linenr] &&
2564 $rawlines[$linenr] =~ /^\s*\("([^"]+)"\)/) {
2565 $orig_desc = $1;
2566 $hasparens = 1;
2567 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("[^"]+$/i &&
2568 defined $rawlines[$linenr] &&
2569 $rawlines[$linenr] =~ /^\s*[^"]+"\)/) {
2570 $line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)$/i;
2571 $orig_desc = $1;
2572 $rawlines[$linenr] =~ /^\s*([^"]+)"\)/;
2573 $orig_desc .= " " . $1;
2574 $hasparens = 1;
2575 }
2576
2577 ($id, $description) = git_commit_info($orig_commit,
2578 $id, $orig_desc);
2579
2580 if ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens) {
2581 ERROR("GIT_COMMIT_ID",
2582 "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herecurr);
2583 }
2584 }
2585
2586# Check for added, moved or deleted files
2587 if (!$reported_maintainer_file && !$in_commit_log &&
2588 ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
2589 $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ ||
2590 ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ &&
2591 (defined($1) || defined($2))))) {
2592 $is_patch = 1;
2593 $reported_maintainer_file = 1;
2594 WARN("FILE_PATH_CHANGES",
2595 "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr);
2596 }
2597
2598# Check for wrappage within a valid hunk of the file
2599 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) {
2600 ERROR("CORRUPTED_PATCH",
2601 "patch seems to be corrupt (line wrapped?)\n" .
2602 $herecurr) if (!$emitted_corrupt++);
2603 }
2604
2605# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php
2606 if (($realfile =~ /^$/ || $line =~ /^\+/) &&
2607 $rawline !~ m/^$UTF8*$/) {
2608 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/);
2609
2610 my $blank = copy_spacing($rawline);
2611 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^";
2612 my $hereptr = "$hereline$ptr\n";
2613
2614 CHK("INVALID_UTF8",
2615 "Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr);
2616 }
2617
2618# Check if it's the start of a commit log
2619# (not a header line and we haven't seen the patch filename)
2620 if ($in_header_lines && $realfile =~ /^$/ &&
2621 !($rawline =~ /^\s+\S/ ||
2622 $rawline =~ /^(commit\b|from\b|[\w-]+:).*$/i)) {
2623 $in_header_lines = 0;
2624 $in_commit_log = 1;
2625 $has_commit_log = 1;
2626 }
2627
2628# Check if there is UTF-8 in a commit log when a mail header has explicitly
2629# declined it, i.e defined some charset where it is missing.
2630 if ($in_header_lines &&
2631 $rawline =~ /^Content-Type:.+charset="(.+)".*$/ &&
2632 $1 !~ /utf-8/i) {
2633 $non_utf8_charset = 1;
2634 }
2635
2636 if ($in_commit_log && $non_utf8_charset && $realfile =~ /^$/ &&
2637 $rawline =~ /$NON_ASCII_UTF8/) {
2638 WARN("UTF8_BEFORE_PATCH",
2639 "8-bit UTF-8 used in possible commit log\n" . $herecurr);
2640 }
2641
2642# Check for absolute kernel paths in commit message
2643 if ($tree && $in_commit_log) {
2644 while ($line =~ m{(?:^|\s)(/\S*)}g) {
2645 my $file = $1;
2646
2647 if ($file =~ m{^(.*?)(?::\d+)+:?$} &&
2648 check_absolute_file($1, $herecurr)) {
2649 #
2650 } else {
2651 check_absolute_file($file, $herecurr);
2652 }
2653 }
2654 }
2655
2656# Check for various typo / spelling mistakes
2657 if (defined($misspellings) &&
2658 ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) {
2659 while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) {
2660 my $typo = $1;
2661 my $typo_fix = $spelling_fix{lc($typo)};
2662 $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/);
2663 $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/);
2664 my $msg_type = \&WARN;
2665 $msg_type = \&CHK if ($file);
2666 if (&{$msg_type}("TYPO_SPELLING",
2667 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) &&
2668 $fix) {
2669 $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/;
2670 }
2671 }
2672 }
2673
2674# ignore non-hunk lines and lines being removed
2675 next if (!$hunk_line || $line =~ /^-/);
2676
2677#trailing whitespace
2678 if ($line =~ /^\+.*\015/) {
2679 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2680 if (ERROR("DOS_LINE_ENDINGS",
2681 "DOS line endings\n" . $herevet) &&
2682 $fix) {
2683 $fixed[$fixlinenr] =~ s/[\s\015]+$//;
2684 }
2685 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) {
2686 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2687 if (ERROR("TRAILING_WHITESPACE",
2688 "trailing whitespace\n" . $herevet) &&
2689 $fix) {
2690 $fixed[$fixlinenr] =~ s/\s+$//;
2691 }
2692
2693 $rpt_cleaners = 1;
2694 }
2695
2696# Check for FSF mailing addresses.
2697 if ($rawline =~ /\bwrite to the Free/i ||
2698 $rawline =~ /\b59\s+Temple\s+Pl/i ||
2699 $rawline =~ /\b51\s+Franklin\s+St/i) {
2700 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2701 my $msg_type = \&ERROR;
2702 $msg_type = \&CHK if ($file);
2703 &{$msg_type}("FSF_MAILING_ADDRESS",
2704 "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet)
2705 }
2706
2707# check for Kconfig help text having a real description
2708# Only applies when adding the entry originally, after that we do not have
2709# sufficient context to determine whether it is indeed long enough.
2710 if ($realfile =~ /Kconfig/ &&
2711 $line =~ /^\+\s*config\s+/) {
2712 my $length = 0;
2713 my $cnt = $realcnt;
2714 my $ln = $linenr + 1;
2715 my $f;
2716 my $is_start = 0;
2717 my $is_end = 0;
2718 for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) {
2719 $f = $lines[$ln - 1];
2720 $cnt-- if ($lines[$ln - 1] !~ /^-/);
2721 $is_end = $lines[$ln - 1] =~ /^\+/;
2722
2723 next if ($f =~ /^-/);
2724 last if (!$file && $f =~ /^\@\@/);
2725
2726 if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate)\s*\"/) {
2727 $is_start = 1;
2728 } elsif ($lines[$ln - 1] =~ /^\+\s*(?:---)?help(?:---)?$/) {
2729 $length = -1;
2730 }
2731
2732 $f =~ s/^.//;
2733 $f =~ s/#.*//;
2734 $f =~ s/^\s+//;
2735 next if ($f =~ /^$/);
2736 if ($f =~ /^\s*config\s/) {
2737 $is_end = 1;
2738 last;
2739 }
2740 $length++;
2741 }
2742 if ($is_start && $is_end && $length < $min_conf_desc_length) {
2743 WARN("CONFIG_DESCRIPTION",
2744 "please write a paragraph that describes the config symbol fully\n" . $herecurr);
2745 }
2746 #print "is_start<$is_start> is_end<$is_end> length<$length>\n";
2747 }
2748
2749# discourage the addition of CONFIG_EXPERIMENTAL in Kconfig.
2750 if ($realfile =~ /Kconfig/ &&
2751 $line =~ /.\s*depends on\s+.*\bEXPERIMENTAL\b/) {
2752 WARN("CONFIG_EXPERIMENTAL",
2753 "Use of CONFIG_EXPERIMENTAL is deprecated. For alternatives, see https://lkml.org/lkml/2012/10/23/580\n");
2754 }
2755
2756# discourage the use of boolean for type definition attributes of Kconfig options
2757 if ($realfile =~ /Kconfig/ &&
2758 $line =~ /^\+\s*\bboolean\b/) {
2759 WARN("CONFIG_TYPE_BOOLEAN",
2760 "Use of boolean is deprecated, please use bool instead.\n" . $herecurr);
2761 }
2762
2763 if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) &&
2764 ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) {
2765 my $flag = $1;
2766 my $replacement = {
2767 'EXTRA_AFLAGS' => 'asflags-y',
2768 'EXTRA_CFLAGS' => 'ccflags-y',
2769 'EXTRA_CPPFLAGS' => 'cppflags-y',
2770 'EXTRA_LDFLAGS' => 'ldflags-y',
2771 };
2772
2773 WARN("DEPRECATED_VARIABLE",
2774 "Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
2775 }
2776
2777# check for DT compatible documentation
2778 if (defined $root &&
2779 (($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
2780 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) {
2781
2782 my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
2783
2784 my $dt_path = $root . "/Documentation/devicetree/bindings/";
2785 my $vp_file = $dt_path . "vendor-prefixes.txt";
2786
2787 foreach my $compat (@compats) {
2788 my $compat2 = $compat;
2789 $compat2 =~ s/\,[a-zA-Z0-9]*\-/\,<\.\*>\-/;
2790 my $compat3 = $compat;
2791 $compat3 =~ s/\,([a-z]*)[0-9]*\-/\,$1<\.\*>\-/;
2792 `grep -Erq "$compat|$compat2|$compat3" $dt_path`;
2793 if ( $? >> 8 ) {
2794 WARN("UNDOCUMENTED_DT_STRING",
2795 "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
2796 }
2797
2798 next if $compat !~ /^([a-zA-Z0-9\-]+)\,/;
2799 my $vendor = $1;
2800 `grep -Eq "^$vendor\\b" $vp_file`;
2801 if ( $? >> 8 ) {
2802 WARN("UNDOCUMENTED_DT_STRING",
2803 "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr);
2804 }
2805 }
2806 }
2807
2808# check we are in a valid source file if not then ignore this hunk
2809 next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
2810
2811# line length limit (with some exclusions)
2812#
2813# There are a few types of lines that may extend beyond $max_line_length:
2814# logging functions like pr_info that end in a string
2815# lines with a single string
2816# #defines that are a single string
2817#
2818# There are 3 different line length message types:
2819# LONG_LINE_COMMENT a comment starts before but extends beyond $max_linelength
2820# LONG_LINE_STRING a string starts before but extends beyond $max_line_length
2821# LONG_LINE all other lines longer than $max_line_length
2822#
2823# if LONG_LINE is ignored, the other 2 types are also ignored
2824#
2825
2826 if ($line =~ /^\+/ && $length > $max_line_length) {
2827 my $msg_type = "LONG_LINE";
2828
2829 # Check the allowed long line types first
2830
2831 # logging functions that end in a string that starts
2832 # before $max_line_length
2833 if ($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(?:KERN_\S+\s*|[^"]*))?($String\s*(?:|,|\)\s*;)\s*)$/ &&
2834 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
2835 $msg_type = "";
2836
2837 # lines with only strings (w/ possible termination)
2838 # #defines with only strings
2839 } elsif ($line =~ /^\+\s*$String\s*(?:\s*|,|\)\s*;)\s*$/ ||
2840 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) {
2841 $msg_type = "";
2842
2843 # EFI_GUID is another special case
2844 } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/) {
2845 $msg_type = "";
2846
2847 # Otherwise set the alternate message types
2848
2849 # a comment starts before $max_line_length
2850 } elsif ($line =~ /($;[\s$;]*)$/ &&
2851 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
2852 $msg_type = "LONG_LINE_COMMENT"
2853
2854 # a quoted string starts before $max_line_length
2855 } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))?)$/ &&
2856 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) {
2857 $msg_type = "LONG_LINE_STRING"
2858 }
2859
2860 if ($msg_type ne "" &&
2861 (show_type("LONG_LINE") || show_type($msg_type))) {
2862 WARN($msg_type,
2863 "line over $max_line_length characters\n" . $herecurr);
2864 }
2865 }
2866
2867# check for adding lines without a newline.
2868 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) {
2869 WARN("MISSING_EOF_NEWLINE",
2870 "adding a line without newline at end of file\n" . $herecurr);
2871 }
2872
2873# Blackfin: use hi/lo macros
2874 if ($realfile =~ m@arch/blackfin/.*\.S$@) {
2875 if ($line =~ /\.[lL][[:space:]]*=.*&[[:space:]]*0x[fF][fF][fF][fF]/) {
2876 my $herevet = "$here\n" . cat_vet($line) . "\n";
2877 ERROR("LO_MACRO",
2878 "use the LO() macro, not (... & 0xFFFF)\n" . $herevet);
2879 }
2880 if ($line =~ /\.[hH][[:space:]]*=.*>>[[:space:]]*16/) {
2881 my $herevet = "$here\n" . cat_vet($line) . "\n";
2882 ERROR("HI_MACRO",
2883 "use the HI() macro, not (... >> 16)\n" . $herevet);
2884 }
2885 }
2886
2887# check we are in a valid source file C or perl if not then ignore this hunk
2888 next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
2889
2890# at the beginning of a line any tabs must come first and anything
2891# more than 8 must use tabs.
2892 if ($rawline =~ /^\+\s* \t\s*\S/ ||
2893 $rawline =~ /^\+\s* \s*/) {
2894 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2895 $rpt_cleaners = 1;
2896 if (ERROR("CODE_INDENT",
2897 "code indent should use tabs where possible\n" . $herevet) &&
2898 $fix) {
2899 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
2900 }
2901 }
2902
2903# check for space before tabs.
2904 if ($rawline =~ /^\+/ && $rawline =~ / \t/) {
2905 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
2906 if (WARN("SPACE_BEFORE_TAB",
2907 "please, no space before tabs\n" . $herevet) &&
2908 $fix) {
2909 while ($fixed[$fixlinenr] =~
2910 s/(^\+.*) {8,8}\t/$1\t\t/) {}
2911 while ($fixed[$fixlinenr] =~
2912 s/(^\+.*) +\t/$1\t/) {}
2913 }
2914 }
2915
2916# check for && or || at the start of a line
2917 if ($rawline =~ /^\+\s*(&&|\|\|)/) {
2918 CHK("LOGICAL_CONTINUATIONS",
2919 "Logical continuations should be on the previous line\n" . $hereprev);
2920 }
2921
2922# check indentation starts on a tab stop
2923 if ($^V && $^V ge 5.10.0 &&
2924 $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$))/) {
2925 my $indent = length($1);
2926 if ($indent % 8) {
2927 if (WARN("TABSTOP",
2928 "Statements should start on a tabstop\n" . $herecurr) &&
2929 $fix) {
2930 $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/8)@e;
2931 }
2932 }
2933 }
2934
2935# check multi-line statement indentation matches previous line
2936 if ($^V && $^V ge 5.10.0 &&
2937 $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|$Ident\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) {
2938 $prevline =~ /^\+(\t*)(.*)$/;
2939 my $oldindent = $1;
2940 my $rest = $2;
2941
2942 my $pos = pos_last_openparen($rest);
2943 if ($pos >= 0) {
2944 $line =~ /^(\+| )([ \t]*)/;
2945 my $newindent = $2;
2946
2947 my $goodtabindent = $oldindent .
2948 "\t" x ($pos / 8) .
2949 " " x ($pos % 8);
2950 my $goodspaceindent = $oldindent . " " x $pos;
2951
2952 if ($newindent ne $goodtabindent &&
2953 $newindent ne $goodspaceindent) {
2954
2955 if (CHK("PARENTHESIS_ALIGNMENT",
2956 "Alignment should match open parenthesis\n" . $hereprev) &&
2957 $fix && $line =~ /^\+/) {
2958 $fixed[$fixlinenr] =~
2959 s/^\+[ \t]*/\+$goodtabindent/;
2960 }
2961 }
2962 }
2963 }
2964
2965# check for space after cast like "(int) foo" or "(struct foo) bar"
2966# avoid checking a few false positives:
2967# "sizeof(<type>)" or "__alignof__(<type>)"
2968# function pointer declarations like "(*foo)(int) = bar;"
2969# structure definitions like "(struct foo) { 0 };"
2970# multiline macros that define functions
2971# known attributes or the __attribute__ keyword
2972 if ($line =~ /^\+(.*)\(\s*$Type\s*\)([ \t]++)((?![={]|\\$|$Attribute|__attribute__))/ &&
2973 (!defined($1) || $1 !~ /\b(?:sizeof|__alignof__)\s*$/)) {
2974 if (CHK("SPACING",
2975 "No space is necessary after a cast\n" . $herecurr) &&
2976 $fix) {
2977 $fixed[$fixlinenr] =~
2978 s/(\(\s*$Type\s*\))[ \t]+/$1/;
2979 }
2980 }
2981
2982# Block comment styles
2983# Networking with an initial /*
2984 if ($realfile =~ m@^(drivers/net/|net/)@ &&
2985 $prevrawline =~ /^\+[ \t]*\/\*[ \t]*$/ &&
2986 $rawline =~ /^\+[ \t]*\*/ &&
2987 $realline > 2) {
2988 WARN("NETWORKING_BLOCK_COMMENT_STYLE",
2989 "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev);
2990 }
2991
2992# Block comments use * on subsequent lines
2993 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
2994 $prevrawline =~ /^\+.*?\/\*/ && #starting /*
2995 $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */
2996 $rawline =~ /^\+/ && #line is new
2997 $rawline !~ /^\+[ \t]*\*/) { #no leading *
2998 WARN("BLOCK_COMMENT_STYLE",
2999 "Block comments use * on subsequent lines\n" . $hereprev);
3000 }
3001
3002# Block comments use */ on trailing lines
3003 if ($rawline !~ m@^\+[ \t]*\*/[ \t]*$@ && #trailing */
3004 $rawline !~ m@^\+.*/\*.*\*/[ \t]*$@ && #inline /*...*/
3005 $rawline !~ m@^\+.*\*{2,}/[ \t]*$@ && #trailing **/
3006 $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */
3007 WARN("BLOCK_COMMENT_STYLE",
3008 "Block comments use a trailing */ on a separate line\n" . $herecurr);
3009 }
3010
3011# Block comment * alignment
3012 if ($prevline =~ /$;[ \t]*$/ && #ends in comment
3013 $line =~ /^\+[ \t]*$;/ && #leading comment
3014 $rawline =~ /^\+[ \t]*\*/ && #leading *
3015 (($prevrawline =~ /^\+.*?\/\*/ && #leading /*
3016 $prevrawline !~ /\*\/[ \t]*$/) || #no trailing */
3017 $prevrawline =~ /^\+[ \t]*\*/)) { #leading *
3018 my $oldindent;
3019 $prevrawline =~ m@^\+([ \t]*/?)\*@;
3020 if (defined($1)) {
3021 $oldindent = expand_tabs($1);
3022 } else {
3023 $prevrawline =~ m@^\+(.*/?)\*@;
3024 $oldindent = expand_tabs($1);
3025 }
3026 $rawline =~ m@^\+([ \t]*)\*@;
3027 my $newindent = $1;
3028 $newindent = expand_tabs($newindent);
3029 if (length($oldindent) ne length($newindent)) {
3030 WARN("BLOCK_COMMENT_STYLE",
3031 "Block comments should align the * on each line\n" . $hereprev);
3032 }
3033 }
3034
3035# check for missing blank lines after struct/union declarations
3036# with exceptions for various attributes and macros
3037 if ($prevline =~ /^[\+ ]};?\s*$/ &&
3038 $line =~ /^\+/ &&
3039 !($line =~ /^\+\s*$/ ||
3040 $line =~ /^\+\s*EXPORT_SYMBOL/ ||
3041 $line =~ /^\+\s*MODULE_/i ||
3042 $line =~ /^\+\s*\#\s*(?:end|elif|else)/ ||
3043 $line =~ /^\+[a-z_]*init/ ||
3044 $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ ||
3045 $line =~ /^\+\s*DECLARE/ ||
3046 $line =~ /^\+\s*__setup/)) {
3047 if (CHK("LINE_SPACING",
3048 "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) &&
3049 $fix) {
3050 fix_insert_line($fixlinenr, "\+");
3051 }
3052 }
3053
3054# check for multiple consecutive blank lines
3055 if ($prevline =~ /^[\+ ]\s*$/ &&
3056 $line =~ /^\+\s*$/ &&
3057 $last_blank_line != ($linenr - 1)) {
3058 if (CHK("LINE_SPACING",
3059 "Please don't use multiple blank lines\n" . $hereprev) &&
3060 $fix) {
3061 fix_delete_line($fixlinenr, $rawline);
3062 }
3063
3064 $last_blank_line = $linenr;
3065 }
3066
3067# check for missing blank lines after declarations
3068 if ($sline =~ /^\+\s+\S/ && #Not at char 1
3069 # actual declarations
3070 ($prevline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
3071 # function pointer declarations
3072 $prevline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
3073 # foo bar; where foo is some local typedef or #define
3074 $prevline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
3075 # known declaration macros
3076 $prevline =~ /^\+\s+$declaration_macros/) &&
3077 # for "else if" which can look like "$Ident $Ident"
3078 !($prevline =~ /^\+\s+$c90_Keywords\b/ ||
3079 # other possible extensions of declaration lines
3080 $prevline =~ /(?:$Compare|$Assignment|$Operators)\s*$/ ||
3081 # not starting a section or a macro "\" extended line
3082 $prevline =~ /(?:\{\s*|\\)$/) &&
3083 # looks like a declaration
3084 !($sline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
3085 # function pointer declarations
3086 $sline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||
3087 # foo bar; where foo is some local typedef or #define
3088 $sline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ ||
3089 # known declaration macros
3090 $sline =~ /^\+\s+$declaration_macros/ ||
3091 # start of struct or union or enum
3092 $sline =~ /^\+\s+(?:union|struct|enum|typedef)\b/ ||
3093 # start or end of block or continuation of declaration
3094 $sline =~ /^\+\s+(?:$|[\{\}\.\#\"\?\:\(\[])/ ||
3095 # bitfield continuation
3096 $sline =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ ||
3097 # other possible extensions of declaration lines
3098 $sline =~ /^\+\s+\(?\s*(?:$Compare|$Assignment|$Operators)/) &&
3099 # indentation of previous and current line are the same
3100 (($prevline =~ /\+(\s+)\S/) && $sline =~ /^\+$1\S/)) {
3101 if (WARN("LINE_SPACING",
3102 "Missing a blank line after declarations\n" . $hereprev) &&
3103 $fix) {
3104 fix_insert_line($fixlinenr, "\+");
3105 }
3106 }
3107
3108# check for spaces at the beginning of a line.
3109# Exceptions:
3110# 1) within comments
3111# 2) indented preprocessor commands
3112# 3) hanging labels
3113 if ($rawline =~ /^\+ / && $line !~ /^\+ *(?:$;|#|$Ident:)/) {
3114 my $herevet = "$here\n" . cat_vet($rawline) . "\n";
3115 if (WARN("LEADING_SPACE",
3116 "please, no spaces at the start of a line\n" . $herevet) &&
3117 $fix) {
3118 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e;
3119 }
3120 }
3121
3122# check we are in a valid C source file if not then ignore this hunk
3123 next if ($realfile !~ /\.(h|c)$/);
3124
3125# check indentation of any line with a bare else
3126# (but not if it is a multiple line "if (foo) return bar; else return baz;")
3127# if the previous line is a break or return and is indented 1 tab more...
3128 if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
3129 my $tabs = length($1) + 1;
3130 if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
3131 ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
3132 defined $lines[$linenr] &&
3133 $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
3134 WARN("UNNECESSARY_ELSE",
3135 "else is not generally useful after a break or return\n" . $hereprev);
3136 }
3137 }
3138
3139# check indentation of a line with a break;
3140# if the previous line is a goto or return and is indented the same # of tabs
3141 if ($sline =~ /^\+([\t]+)break\s*;\s*$/) {
3142 my $tabs = $1;
3143 if ($prevline =~ /^\+$tabs(?:goto|return)\b/) {
3144 WARN("UNNECESSARY_BREAK",
3145 "break is not useful after a goto or return\n" . $hereprev);
3146 }
3147 }
3148
3149# discourage the addition of CONFIG_EXPERIMENTAL in #if(def).
3150 if ($line =~ /^\+\s*\#\s*if.*\bCONFIG_EXPERIMENTAL\b/) {
3151 WARN("CONFIG_EXPERIMENTAL",
3152 "Use of CONFIG_EXPERIMENTAL is deprecated. For alternatives, see https://lkml.org/lkml/2012/10/23/580\n");
3153 }
3154
3155# check for RCS/CVS revision markers
3156 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) {
3157 WARN("CVS_KEYWORD",
3158 "CVS style keyword markers, these will _not_ be updated\n". $herecurr);
3159 }
3160
3161# Blackfin: don't use __builtin_bfin_[cs]sync
3162 if ($line =~ /__builtin_bfin_csync/) {
3163 my $herevet = "$here\n" . cat_vet($line) . "\n";
3164 ERROR("CSYNC",
3165 "use the CSYNC() macro in asm/blackfin.h\n" . $herevet);
3166 }
3167 if ($line =~ /__builtin_bfin_ssync/) {
3168 my $herevet = "$here\n" . cat_vet($line) . "\n";
3169 ERROR("SSYNC",
3170 "use the SSYNC() macro in asm/blackfin.h\n" . $herevet);
3171 }
3172
3173# check for old HOTPLUG __dev<foo> section markings
3174 if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) {
3175 WARN("HOTPLUG_SECTION",
3176 "Using $1 is unnecessary\n" . $herecurr);
3177 }
3178
3179# Check for potential 'bare' types
3180 my ($stat, $cond, $line_nr_next, $remain_next, $off_next,
3181 $realline_next);
3182#print "LINE<$line>\n";
3183 if ($linenr >= $suppress_statement &&
3184 $realcnt && $sline =~ /.\s*\S/) {
3185 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
3186 ctx_statement_block($linenr, $realcnt, 0);
3187 $stat =~ s/\n./\n /g;
3188 $cond =~ s/\n./\n /g;
3189
3190#print "linenr<$linenr> <$stat>\n";
3191 # If this statement has no statement boundaries within
3192 # it there is no point in retrying a statement scan
3193 # until we hit end of it.
3194 my $frag = $stat; $frag =~ s/;+\s*$//;
3195 if ($frag !~ /(?:{|;)/) {
3196#print "skip<$line_nr_next>\n";
3197 $suppress_statement = $line_nr_next;
3198 }
3199
3200 # Find the real next line.
3201 $realline_next = $line_nr_next;
3202 if (defined $realline_next &&
3203 (!defined $lines[$realline_next - 1] ||
3204 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) {
3205 $realline_next++;
3206 }
3207
3208 my $s = $stat;
3209 $s =~ s/{.*$//s;
3210
3211 # Ignore goto labels.
3212 if ($s =~ /$Ident:\*$/s) {
3213
3214 # Ignore functions being called
3215 } elsif ($s =~ /^.\s*$Ident\s*\(/s) {
3216
3217 } elsif ($s =~ /^.\s*else\b/s) {
3218
3219 # declarations always start with types
3220 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) {
3221 my $type = $1;
3222 $type =~ s/\s+/ /g;
3223 possible($type, "A:" . $s);
3224
3225 # definitions in global scope can only start with types
3226 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) {
3227 possible($1, "B:" . $s);
3228 }
3229
3230 # any (foo ... *) is a pointer cast, and foo is a type
3231 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) {
3232 possible($1, "C:" . $s);
3233 }
3234
3235 # Check for any sort of function declaration.
3236 # int foo(something bar, other baz);
3237 # void (*store_gdt)(x86_descr_ptr *);
3238 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) {
3239 my ($name_len) = length($1);
3240
3241 my $ctx = $s;
3242 substr($ctx, 0, $name_len + 1, '');
3243 $ctx =~ s/\)[^\)]*$//;
3244
3245 for my $arg (split(/\s*,\s*/, $ctx)) {
3246 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) {
3247
3248 possible($1, "D:" . $s);
3249 }
3250 }
3251 }
3252
3253 }
3254
3255#
3256# Checks which may be anchored in the context.
3257#
3258
3259# Check for switch () and associated case and default
3260# statements should be at the same indent.
3261 if ($line=~/\bswitch\s*\(.*\)/) {
3262 my $err = '';
3263 my $sep = '';
3264 my @ctx = ctx_block_outer($linenr, $realcnt);
3265 shift(@ctx);
3266 for my $ctx (@ctx) {
3267 my ($clen, $cindent) = line_stats($ctx);
3268 if ($ctx =~ /^\+\s*(case\s+|default:)/ &&
3269 $indent != $cindent) {
3270 $err .= "$sep$ctx\n";
3271 $sep = '';
3272 } else {
3273 $sep = "[...]\n";
3274 }
3275 }
3276 if ($err ne '') {
3277 ERROR("SWITCH_CASE_INDENT_LEVEL",
3278 "switch and case should be at the same indent\n$hereline$err");
3279 }
3280 }
3281
3282# if/while/etc brace do not go on next line, unless defining a do while loop,
3283# or if that brace on the next line is for something else
3284 if ($line =~ /(.*)\b((?:if|while|for|switch|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) {
3285 my $pre_ctx = "$1$2";
3286
3287 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0);
3288
3289 if ($line =~ /^\+\t{6,}/) {
3290 WARN("DEEP_INDENTATION",
3291 "Too many leading tabs - consider code refactoring\n" . $herecurr);
3292 }
3293
3294 my $ctx_cnt = $realcnt - $#ctx - 1;
3295 my $ctx = join("\n", @ctx);
3296
3297 my $ctx_ln = $linenr;
3298 my $ctx_skip = $realcnt;
3299
3300 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt &&
3301 defined $lines[$ctx_ln - 1] &&
3302 $lines[$ctx_ln - 1] =~ /^-/)) {
3303 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n";
3304 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/);
3305 $ctx_ln++;
3306 }
3307
3308 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n";
3309 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n";
3310
3311 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) {
3312 ERROR("OPEN_BRACE",
3313 "that open brace { should be on the previous line\n" .
3314 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
3315 }
3316 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ &&
3317 $ctx =~ /\)\s*\;\s*$/ &&
3318 defined $lines[$ctx_ln - 1])
3319 {
3320 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]);
3321 if ($nindent > $indent) {
3322 WARN("TRAILING_SEMICOLON",
3323 "trailing semicolon indicates no statements, indent implies otherwise\n" .
3324 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
3325 }
3326 }
3327 }
3328
3329# Check relative indent for conditionals and blocks.
3330 if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) {
3331 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
3332 ctx_statement_block($linenr, $realcnt, 0)
3333 if (!defined $stat);
3334 my ($s, $c) = ($stat, $cond);
3335
3336 substr($s, 0, length($c), '');
3337
3338 # remove inline comments
3339 $s =~ s/$;/ /g;
3340 $c =~ s/$;/ /g;
3341
3342 # Find out how long the conditional actually is.
3343 my @newlines = ($c =~ /\n/gs);
3344 my $cond_lines = 1 + $#newlines;
3345
3346 # Make sure we remove the line prefixes as we have
3347 # none on the first line, and are going to readd them
3348 # where necessary.
3349 $s =~ s/\n./\n/gs;
3350 while ($s =~ /\n\s+\\\n/) {
3351 $cond_lines += $s =~ s/\n\s+\\\n/\n/g;
3352 }
3353
3354 # We want to check the first line inside the block
3355 # starting at the end of the conditional, so remove:
3356 # 1) any blank line termination
3357 # 2) any opening brace { on end of the line
3358 # 3) any do (...) {
3359 my $continuation = 0;
3360 my $check = 0;
3361 $s =~ s/^.*\bdo\b//;
3362 $s =~ s/^\s*{//;
3363 if ($s =~ s/^\s*\\//) {
3364 $continuation = 1;
3365 }
3366 if ($s =~ s/^\s*?\n//) {
3367 $check = 1;
3368 $cond_lines++;
3369 }
3370
3371 # Also ignore a loop construct at the end of a
3372 # preprocessor statement.
3373 if (($prevline =~ /^.\s*#\s*define\s/ ||
3374 $prevline =~ /\\\s*$/) && $continuation == 0) {
3375 $check = 0;
3376 }
3377
3378 my $cond_ptr = -1;
3379 $continuation = 0;
3380 while ($cond_ptr != $cond_lines) {
3381 $cond_ptr = $cond_lines;
3382
3383 # If we see an #else/#elif then the code
3384 # is not linear.
3385 if ($s =~ /^\s*\#\s*(?:else|elif)/) {
3386 $check = 0;
3387 }
3388
3389 # Ignore:
3390 # 1) blank lines, they should be at 0,
3391 # 2) preprocessor lines, and
3392 # 3) labels.
3393 if ($continuation ||
3394 $s =~ /^\s*?\n/ ||
3395 $s =~ /^\s*#\s*?/ ||
3396 $s =~ /^\s*$Ident\s*:/) {
3397 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0;
3398 if ($s =~ s/^.*?\n//) {
3399 $cond_lines++;
3400 }
3401 }
3402 }
3403
3404 my (undef, $sindent) = line_stats("+" . $s);
3405 my $stat_real = raw_line($linenr, $cond_lines);
3406
3407 # Check if either of these lines are modified, else
3408 # this is not this patch's fault.
3409 if (!defined($stat_real) ||
3410 $stat !~ /^\+/ && $stat_real !~ /^\+/) {
3411 $check = 0;
3412 }
3413 if (defined($stat_real) && $cond_lines > 1) {
3414 $stat_real = "[...]\n$stat_real";
3415 }
3416
3417 #print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
3418
3419 if ($check && $s ne '' &&
3420 (($sindent % 8) != 0 ||
3421 ($sindent < $indent) ||
3422 ($sindent > $indent + 8))) {
3423 WARN("SUSPECT_CODE_INDENT",
3424 "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
3425 }
3426 }
3427
3428 # Track the 'values' across context and added lines.
3429 my $opline = $line; $opline =~ s/^./ /;
3430 my ($curr_values, $curr_vars) =
3431 annotate_values($opline . "\n", $prev_values);
3432 $curr_values = $prev_values . $curr_values;
3433 if ($dbg_values) {
3434 my $outline = $opline; $outline =~ s/\t/ /g;
3435 print "$linenr > .$outline\n";
3436 print "$linenr > $curr_values\n";
3437 print "$linenr > $curr_vars\n";
3438 }
3439 $prev_values = substr($curr_values, -1);
3440
3441#ignore lines not being added
3442 next if ($line =~ /^[^\+]/);
3443
3444# check for dereferences that span multiple lines
3445 if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ &&
3446 $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) {
3447 $prevline =~ /($Lval\s*(?:\.|->))\s*$/;
3448 my $ref = $1;
3449 $line =~ /^.\s*($Lval)/;
3450 $ref .= $1;
3451 $ref =~ s/\s//g;
3452 WARN("MULTILINE_DEREFERENCE",
3453 "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev);
3454 }
3455
3456# check for declarations of signed or unsigned without int
3457 while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) {
3458 my $type = $1;
3459 my $var = $2;
3460 $var = "" if (!defined $var);
3461 if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) {
3462 my $sign = $1;
3463 my $pointer = $2;
3464
3465 $pointer = "" if (!defined $pointer);
3466
3467 if (WARN("UNSPECIFIED_INT",
3468 "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) &&
3469 $fix) {
3470 my $decl = trim($sign) . " int ";
3471 my $comp_pointer = $pointer;
3472 $comp_pointer =~ s/\s//g;
3473 $decl .= $comp_pointer;
3474 $decl = rtrim($decl) if ($var eq "");
3475 $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@;
3476 }
3477 }
3478 }
3479
3480# TEST: allow direct testing of the type matcher.
3481 if ($dbg_type) {
3482 if ($line =~ /^.\s*$Declare\s*$/) {
3483 ERROR("TEST_TYPE",
3484 "TEST: is type\n" . $herecurr);
3485 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) {
3486 ERROR("TEST_NOT_TYPE",
3487 "TEST: is not type ($1 is)\n". $herecurr);
3488 }
3489 next;
3490 }
3491# TEST: allow direct testing of the attribute matcher.
3492 if ($dbg_attr) {
3493 if ($line =~ /^.\s*$Modifier\s*$/) {
3494 ERROR("TEST_ATTR",
3495 "TEST: is attr\n" . $herecurr);
3496 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) {
3497 ERROR("TEST_NOT_ATTR",
3498 "TEST: is not attr ($1 is)\n". $herecurr);
3499 }
3500 next;
3501 }
3502
3503# check for initialisation to aggregates open brace on the next line
3504 if ($line =~ /^.\s*{/ &&
3505 $prevline =~ /(?:^|[^=])=\s*$/) {
3506 if (ERROR("OPEN_BRACE",
3507 "that open brace { should be on the previous line\n" . $hereprev) &&
3508 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
3509 fix_delete_line($fixlinenr - 1, $prevrawline);
3510 fix_delete_line($fixlinenr, $rawline);
3511 my $fixedline = $prevrawline;
3512 $fixedline =~ s/\s*=\s*$/ = {/;
3513 fix_insert_line($fixlinenr, $fixedline);
3514 $fixedline = $line;
3515 $fixedline =~ s/^(.\s*){\s*/$1/;
3516 fix_insert_line($fixlinenr, $fixedline);
3517 }
3518 }
3519
3520#
3521# Checks which are anchored on the added line.
3522#
3523
3524# check for malformed paths in #include statements (uses RAW line)
3525 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) {
3526 my $path = $1;
3527 if ($path =~ m{//}) {
3528 ERROR("MALFORMED_INCLUDE",
3529 "malformed #include filename\n" . $herecurr);
3530 }
3531 if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) {
3532 ERROR("UAPI_INCLUDE",
3533 "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr);
3534 }
3535 }
3536
3537# no C99 // comments
3538 if ($line =~ m{//}) {
3539 if (ERROR("C99_COMMENTS",
3540 "do not use C99 // comments\n" . $herecurr) &&
3541 $fix) {
3542 my $line = $fixed[$fixlinenr];
3543 if ($line =~ /\/\/(.*)$/) {
3544 my $comment = trim($1);
3545 $fixed[$fixlinenr] =~ s@\/\/(.*)$@/\* $comment \*/@;
3546 }
3547 }
3548 }
3549 # Remove C99 comments.
3550 $line =~ s@//.*@@;
3551 $opline =~ s@//.*@@;
3552
3553# EXPORT_SYMBOL should immediately follow the thing it is exporting, consider
3554# the whole statement.
3555#print "APW <$lines[$realline_next - 1]>\n";
3556 if (defined $realline_next &&
3557 exists $lines[$realline_next - 1] &&
3558 !defined $suppress_export{$realline_next} &&
3559 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
3560 $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
3561 # Handle definitions which produce identifiers with
3562 # a prefix:
3563 # XXX(foo);
3564 # EXPORT_SYMBOL(something_foo);
3565 my $name = $1;
3566 if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ &&
3567 $name =~ /^${Ident}_$2/) {
3568#print "FOO C name<$name>\n";
3569 $suppress_export{$realline_next} = 1;
3570
3571 } elsif ($stat !~ /(?:
3572 \n.}\s*$|
3573 ^.DEFINE_$Ident\(\Q$name\E\)|
3574 ^.DECLARE_$Ident\(\Q$name\E\)|
3575 ^.LIST_HEAD\(\Q$name\E\)|
3576 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(|
3577 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\()
3578 )/x) {
3579#print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n";
3580 $suppress_export{$realline_next} = 2;
3581 } else {
3582 $suppress_export{$realline_next} = 1;
3583 }
3584 }
3585 if (!defined $suppress_export{$linenr} &&
3586 $prevline =~ /^.\s*$/ &&
3587 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/ ||
3588 $line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) {
3589#print "FOO B <$lines[$linenr - 1]>\n";
3590 $suppress_export{$linenr} = 2;
3591 }
3592 if (defined $suppress_export{$linenr} &&
3593 $suppress_export{$linenr} == 2) {
3594 WARN("EXPORT_SYMBOL",
3595 "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr);
3596 }
3597
3598# check for global initialisers.
3599 if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) {
3600 if (ERROR("GLOBAL_INITIALISERS",
3601 "do not initialise globals to $1\n" . $herecurr) &&
3602 $fix) {
3603 $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/;
3604 }
3605 }
3606# check for static initialisers.
3607 if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) {
3608 if (ERROR("INITIALISED_STATIC",
3609 "do not initialise statics to $1\n" .
3610 $herecurr) &&
3611 $fix) {
3612 $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/;
3613 }
3614 }
3615
3616# check for misordered declarations of char/short/int/long with signed/unsigned
3617 while ($sline =~ m{(\b$TypeMisordered\b)}g) {
3618 my $tmp = trim($1);
3619 WARN("MISORDERED_TYPE",
3620 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr);
3621 }
3622
3623# check for static const char * arrays.
3624 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) {
3625 WARN("STATIC_CONST_CHAR_ARRAY",
3626 "static const char * array should probably be static const char * const\n" .
3627 $herecurr);
3628 }
3629
3630# check for static char foo[] = "bar" declarations.
3631 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) {
3632 WARN("STATIC_CONST_CHAR_ARRAY",
3633 "static char array declaration should probably be static const char\n" .
3634 $herecurr);
3635 }
3636
3637# check for const <foo> const where <foo> is not a pointer or array type
3638 if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) {
3639 my $found = $1;
3640 if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) {
3641 WARN("CONST_CONST",
3642 "'const $found const *' should probably be 'const $found * const'\n" . $herecurr);
3643 } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) {
3644 WARN("CONST_CONST",
3645 "'const $found const' should probably be 'const $found'\n" . $herecurr);
3646 }
3647 }
3648
3649# check for non-global char *foo[] = {"bar", ...} declarations.
3650 if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) {
3651 WARN("STATIC_CONST_CHAR_ARRAY",
3652 "char * array declaration might be better as static const\n" .
3653 $herecurr);
3654 }
3655
3656# check for sizeof(foo)/sizeof(foo[0]) that could be ARRAY_SIZE(foo)
3657 if ($line =~ m@\bsizeof\s*\(\s*($Lval)\s*\)@) {
3658 my $array = $1;
3659 if ($line =~ m@\b(sizeof\s*\(\s*\Q$array\E\s*\)\s*/\s*sizeof\s*\(\s*\Q$array\E\s*\[\s*0\s*\]\s*\))@) {
3660 my $array_div = $1;
3661 if (WARN("ARRAY_SIZE",
3662 "Prefer ARRAY_SIZE($array)\n" . $herecurr) &&
3663 $fix) {
3664 $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/;
3665 }
3666 }
3667 }
3668
3669# check for function declarations without arguments like "int foo()"
3670 if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) {
3671 if (ERROR("FUNCTION_WITHOUT_ARGS",
3672 "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
3673 $fix) {
3674 $fixed[$fixlinenr] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/;
3675 }
3676 }
3677
3678# check for new typedefs, only function parameters and sparse annotations
3679# make sense.
3680 if ($line =~ /\btypedef\s/ &&
3681 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ &&
3682 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ &&
3683 $line !~ /\b$typeTypedefs\b/ &&
3684 $line !~ /\b__bitwise\b/) {
3685 WARN("NEW_TYPEDEFS",
3686 "do not add new typedefs\n" . $herecurr);
3687 }
3688
3689# * goes on variable not on type
3690 # (char*[ const])
3691 while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) {
3692 #print "AA<$1>\n";
3693 my ($ident, $from, $to) = ($1, $2, $2);
3694
3695 # Should start with a space.
3696 $to =~ s/^(\S)/ $1/;
3697 # Should not end with a space.
3698 $to =~ s/\s+$//;
3699 # '*'s should not have spaces between.
3700 while ($to =~ s/\*\s+\*/\*\*/) {
3701 }
3702
3703## print "1: from<$from> to<$to> ident<$ident>\n";
3704 if ($from ne $to) {
3705 if (ERROR("POINTER_LOCATION",
3706 "\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr) &&
3707 $fix) {
3708 my $sub_from = $ident;
3709 my $sub_to = $ident;
3710 $sub_to =~ s/\Q$from\E/$to/;
3711 $fixed[$fixlinenr] =~
3712 s@\Q$sub_from\E@$sub_to@;
3713 }
3714 }
3715 }
3716 while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) {
3717 #print "BB<$1>\n";
3718 my ($match, $from, $to, $ident) = ($1, $2, $2, $3);
3719
3720 # Should start with a space.
3721 $to =~ s/^(\S)/ $1/;
3722 # Should not end with a space.
3723 $to =~ s/\s+$//;
3724 # '*'s should not have spaces between.
3725 while ($to =~ s/\*\s+\*/\*\*/) {
3726 }
3727 # Modifiers should have spaces.
3728 $to =~ s/(\b$Modifier$)/$1 /;
3729
3730## print "2: from<$from> to<$to> ident<$ident>\n";
3731 if ($from ne $to && $ident !~ /^$Modifier$/) {
3732 if (ERROR("POINTER_LOCATION",
3733 "\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr) &&
3734 $fix) {
3735
3736 my $sub_from = $match;
3737 my $sub_to = $match;
3738 $sub_to =~ s/\Q$from\E/$to/;
3739 $fixed[$fixlinenr] =~
3740 s@\Q$sub_from\E@$sub_to@;
3741 }
3742 }
3743 }
3744
3745# avoid BUG() or BUG_ON()
3746 if ($line =~ /\b(?:BUG|BUG_ON)\b/) {
3747 my $msg_type = \&WARN;
3748 $msg_type = \&CHK if ($file);
3749 &{$msg_type}("AVOID_BUG",
3750 "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr);
3751 }
3752
3753# avoid LINUX_VERSION_CODE
3754 if ($line =~ /\bLINUX_VERSION_CODE\b/) {
3755 WARN("LINUX_VERSION_CODE",
3756 "LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr);
3757 }
3758
3759# check for uses of printk_ratelimit
3760 if ($line =~ /\bprintk_ratelimit\s*\(/) {
3761 WARN("PRINTK_RATELIMITED",
3762 "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr);
3763 }
3764
3765# printk should use KERN_* levels. Note that follow on printk's on the
3766# same line do not need a level, so we use the current block context
3767# to try and find and validate the current printk. In summary the current
3768# printk includes all preceding printk's which have no newline on the end.
3769# we assume the first bad printk is the one to report.
3770 if ($line =~ /\bprintk\((?!KERN_)\s*"/) {
3771 my $ok = 0;
3772 for (my $ln = $linenr - 1; $ln >= $first_line; $ln--) {
3773 #print "CHECK<$lines[$ln - 1]\n";
3774 # we have a preceding printk if it ends
3775 # with "\n" ignore it, else it is to blame
3776 if ($lines[$ln - 1] =~ m{\bprintk\(}) {
3777 if ($rawlines[$ln - 1] !~ m{\\n"}) {
3778 $ok = 1;
3779 }
3780 last;
3781 }
3782 }
3783 if ($ok == 0) {
3784 WARN("PRINTK_WITHOUT_KERN_LEVEL",
3785 "printk() should include KERN_ facility level\n" . $herecurr);
3786 }
3787 }
3788
3789 if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) {
3790 my $orig = $1;
3791 my $level = lc($orig);
3792 $level = "warn" if ($level eq "warning");
3793 my $level2 = $level;
3794 $level2 = "dbg" if ($level eq "debug");
3795 WARN("PREFER_PR_LEVEL",
3796 "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to printk(KERN_$orig ...\n" . $herecurr);
3797 }
3798
3799 if ($line =~ /\bpr_warning\s*\(/) {
3800 if (WARN("PREFER_PR_LEVEL",
3801 "Prefer pr_warn(... to pr_warning(...\n" . $herecurr) &&
3802 $fix) {
3803 $fixed[$fixlinenr] =~
3804 s/\bpr_warning\b/pr_warn/;
3805 }
3806 }
3807
3808 if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
3809 my $orig = $1;
3810 my $level = lc($orig);
3811 $level = "warn" if ($level eq "warning");
3812 $level = "dbg" if ($level eq "debug");
3813 WARN("PREFER_DEV_LEVEL",
3814 "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr);
3815 }
3816
3817# ENOSYS means "bad syscall nr" and nothing else. This will have a small
3818# number of false positives, but assembly files are not checked, so at
3819# least the arch entry code will not trigger this warning.
3820 if ($line =~ /\bENOSYS\b/) {
3821 WARN("ENOSYS",
3822 "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr);
3823 }
3824
3825# function brace can't be on same line, except for #defines of do while,
3826# or if closed on same line
3827 if (($line=~/$Type\s*$Ident\(.*\).*\s*{/) and
3828 !($line=~/\#\s*define.*do\s\{/) and !($line=~/}/)) {
3829 if (ERROR("OPEN_BRACE",
3830 "open brace '{' following function declarations go on the next line\n" . $herecurr) &&
3831 $fix) {
3832 fix_delete_line($fixlinenr, $rawline);
3833 my $fixed_line = $rawline;
3834 $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(.*)$/;
3835 my $line1 = $1;
3836 my $line2 = $2;
3837 fix_insert_line($fixlinenr, ltrim($line1));
3838 fix_insert_line($fixlinenr, "\+{");
3839 if ($line2 !~ /^\s*$/) {
3840 fix_insert_line($fixlinenr, "\+\t" . trim($line2));
3841 }
3842 }
3843 }
3844
3845# open braces for enum, union and struct go on the same line.
3846 if ($line =~ /^.\s*{/ &&
3847 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
3848 if (ERROR("OPEN_BRACE",
3849 "open brace '{' following $1 go on the same line\n" . $hereprev) &&
3850 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
3851 fix_delete_line($fixlinenr - 1, $prevrawline);
3852 fix_delete_line($fixlinenr, $rawline);
3853 my $fixedline = rtrim($prevrawline) . " {";
3854 fix_insert_line($fixlinenr, $fixedline);
3855 $fixedline = $rawline;
3856 $fixedline =~ s/^(.\s*){\s*/$1\t/;
3857 if ($fixedline !~ /^\+\s*$/) {
3858 fix_insert_line($fixlinenr, $fixedline);
3859 }
3860 }
3861 }
3862
3863# missing space after union, struct or enum definition
3864 if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident){1,2}[=\{]/) {
3865 if (WARN("SPACING",
3866 "missing space after $1 definition\n" . $herecurr) &&
3867 $fix) {
3868 $fixed[$fixlinenr] =~
3869 s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(?:\s+$Ident){1,2})([=\{])/$1 $2/;
3870 }
3871 }
3872
3873# Function pointer declarations
3874# check spacing between type, funcptr, and args
3875# canonical declaration is "type (*funcptr)(args...)"
3876 if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) {
3877 my $declare = $1;
3878 my $pre_pointer_space = $2;
3879 my $post_pointer_space = $3;
3880 my $funcname = $4;
3881 my $post_funcname_space = $5;
3882 my $pre_args_space = $6;
3883
3884# the $Declare variable will capture all spaces after the type
3885# so check it for a missing trailing missing space but pointer return types
3886# don't need a space so don't warn for those.
3887 my $post_declare_space = "";
3888 if ($declare =~ /(\s+)$/) {
3889 $post_declare_space = $1;
3890 $declare = rtrim($declare);
3891 }
3892 if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) {
3893 WARN("SPACING",
3894 "missing space after return type\n" . $herecurr);
3895 $post_declare_space = " ";
3896 }
3897
3898# unnecessary space "type (*funcptr)(args...)"
3899# This test is not currently implemented because these declarations are
3900# equivalent to
3901# int foo(int bar, ...)
3902# and this is form shouldn't/doesn't generate a checkpatch warning.
3903#
3904# elsif ($declare =~ /\s{2,}$/) {
3905# WARN("SPACING",
3906# "Multiple spaces after return type\n" . $herecurr);
3907# }
3908
3909# unnecessary space "type ( *funcptr)(args...)"
3910 if (defined $pre_pointer_space &&
3911 $pre_pointer_space =~ /^\s/) {
3912 WARN("SPACING",
3913 "Unnecessary space after function pointer open parenthesis\n" . $herecurr);
3914 }
3915
3916# unnecessary space "type (* funcptr)(args...)"
3917 if (defined $post_pointer_space &&
3918 $post_pointer_space =~ /^\s/) {
3919 WARN("SPACING",
3920 "Unnecessary space before function pointer name\n" . $herecurr);
3921 }
3922
3923# unnecessary space "type (*funcptr )(args...)"
3924 if (defined $post_funcname_space &&
3925 $post_funcname_space =~ /^\s/) {
3926 WARN("SPACING",
3927 "Unnecessary space after function pointer name\n" . $herecurr);
3928 }
3929
3930# unnecessary space "type (*funcptr) (args...)"
3931 if (defined $pre_args_space &&
3932 $pre_args_space =~ /^\s/) {
3933 WARN("SPACING",
3934 "Unnecessary space before function pointer arguments\n" . $herecurr);
3935 }
3936
3937 if (show_type("SPACING") && $fix) {
3938 $fixed[$fixlinenr] =~
3939 s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex;
3940 }
3941 }
3942
3943# check for spacing round square brackets; allowed:
3944# 1. with a type on the left -- int [] a;
3945# 2. at the beginning of a line for slice initialisers -- [0...10] = 5,
3946# 3. inside a curly brace -- = { [0...10] = 5 }
3947 while ($line =~ /(.*?\s)\[/g) {
3948 my ($where, $prefix) = ($-[1], $1);
3949 if ($prefix !~ /$Type\s+$/ &&
3950 ($where != 0 || $prefix !~ /^.\s+$/) &&
3951 $prefix !~ /[{,]\s+$/) {
3952 if (ERROR("BRACKET_SPACE",
3953 "space prohibited before open square bracket '['\n" . $herecurr) &&
3954 $fix) {
3955 $fixed[$fixlinenr] =~
3956 s/^(\+.*?)\s+\[/$1\[/;
3957 }
3958 }
3959 }
3960
3961# check for spaces between functions and their parentheses.
3962 while ($line =~ /($Ident)\s+\(/g) {
3963 my $name = $1;
3964 my $ctx_before = substr($line, 0, $-[1]);
3965 my $ctx = "$ctx_before$name";
3966
3967 # Ignore those directives where spaces _are_ permitted.
3968 if ($name =~ /^(?:
3969 if|for|while|switch|return|case|
3970 volatile|__volatile__|
3971 __attribute__|format|__extension__|
3972 asm|__asm__)$/x)
3973 {
3974 # cpp #define statements have non-optional spaces, ie
3975 # if there is a space between the name and the open
3976 # parenthesis it is simply not a parameter group.
3977 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) {
3978
3979 # cpp #elif statement condition may start with a (
3980 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) {
3981
3982 # If this whole things ends with a type its most
3983 # likely a typedef for a function.
3984 } elsif ($ctx =~ /$Type$/) {
3985
3986 } else {
3987 if (WARN("SPACING",
3988 "space prohibited between function name and open parenthesis '('\n" . $herecurr) &&
3989 $fix) {
3990 $fixed[$fixlinenr] =~
3991 s/\b$name\s+\(/$name\(/;
3992 }
3993 }
3994 }
3995
3996# Check operator spacing.
3997 if (!($line=~/\#\s*include/)) {
3998 my $fixed_line = "";
3999 my $line_fixed = 0;
4000
4001 my $ops = qr{
4002 <<=|>>=|<=|>=|==|!=|
4003 \+=|-=|\*=|\/=|%=|\^=|\|=|&=|
4004 =>|->|<<|>>|<|>|=|!|~|
4005 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%|
4006 \?:|\?|:
4007 }x;
4008 my @elements = split(/($ops|;)/, $opline);
4009
4010## print("element count: <" . $#elements . ">\n");
4011## foreach my $el (@elements) {
4012## print("el: <$el>\n");
4013## }
4014
4015 my @fix_elements = ();
4016 my $off = 0;
4017
4018 foreach my $el (@elements) {
4019 push(@fix_elements, substr($rawline, $off, length($el)));
4020 $off += length($el);
4021 }
4022
4023 $off = 0;
4024
4025 my $blank = copy_spacing($opline);
4026 my $last_after = -1;
4027
4028 for (my $n = 0; $n < $#elements; $n += 2) {
4029
4030 my $good = $fix_elements[$n] . $fix_elements[$n + 1];
4031
4032## print("n: <$n> good: <$good>\n");
4033
4034 $off += length($elements[$n]);
4035
4036 # Pick up the preceding and succeeding characters.
4037 my $ca = substr($opline, 0, $off);
4038 my $cc = '';
4039 if (length($opline) >= ($off + length($elements[$n + 1]))) {
4040 $cc = substr($opline, $off + length($elements[$n + 1]));
4041 }
4042 my $cb = "$ca$;$cc";
4043
4044 my $a = '';
4045 $a = 'V' if ($elements[$n] ne '');
4046 $a = 'W' if ($elements[$n] =~ /\s$/);
4047 $a = 'C' if ($elements[$n] =~ /$;$/);
4048 $a = 'B' if ($elements[$n] =~ /(\[|\()$/);
4049 $a = 'O' if ($elements[$n] eq '');
4050 $a = 'E' if ($ca =~ /^\s*$/);
4051
4052 my $op = $elements[$n + 1];
4053
4054 my $c = '';
4055 if (defined $elements[$n + 2]) {
4056 $c = 'V' if ($elements[$n + 2] ne '');
4057 $c = 'W' if ($elements[$n + 2] =~ /^\s/);
4058 $c = 'C' if ($elements[$n + 2] =~ /^$;/);
4059 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/);
4060 $c = 'O' if ($elements[$n + 2] eq '');
4061 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/);
4062 } else {
4063 $c = 'E';
4064 }
4065
4066 my $ctx = "${a}x${c}";
4067
4068 my $at = "(ctx:$ctx)";
4069
4070 my $ptr = substr($blank, 0, $off) . "^";
4071 my $hereptr = "$hereline$ptr\n";
4072
4073 # Pull out the value of this operator.
4074 my $op_type = substr($curr_values, $off + 1, 1);
4075
4076 # Get the full operator variant.
4077 my $opv = $op . substr($curr_vars, $off, 1);
4078
4079 # Ignore operators passed as parameters.
4080 if ($op_type ne 'V' &&
4081 $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) {
4082
4083# # Ignore comments
4084# } elsif ($op =~ /^$;+$/) {
4085
4086 # ; should have either the end of line or a space or \ after it
4087 } elsif ($op eq ';') {
4088 if ($ctx !~ /.x[WEBC]/ &&
4089 $cc !~ /^\\/ && $cc !~ /^;/) {
4090 if (ERROR("SPACING",
4091 "space required after that '$op' $at\n" . $hereptr)) {
4092 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
4093 $line_fixed = 1;
4094 }
4095 }
4096
4097 # // is a comment
4098 } elsif ($op eq '//') {
4099
4100 # : when part of a bitfield
4101 } elsif ($opv eq ':B') {
4102 # skip the bitfield test for now
4103
4104 # No spaces for:
4105 # ->
4106 } elsif ($op eq '->') {
4107 if ($ctx =~ /Wx.|.xW/) {
4108 if (ERROR("SPACING",
4109 "spaces prohibited around that '$op' $at\n" . $hereptr)) {
4110 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4111 if (defined $fix_elements[$n + 2]) {
4112 $fix_elements[$n + 2] =~ s/^\s+//;
4113 }
4114 $line_fixed = 1;
4115 }
4116 }
4117
4118 # , must not have a space before and must have a space on the right.
4119 } elsif ($op eq ',') {
4120 my $rtrim_before = 0;
4121 my $space_after = 0;
4122 if ($ctx =~ /Wx./) {
4123 if (ERROR("SPACING",
4124 "space prohibited before that '$op' $at\n" . $hereptr)) {
4125 $line_fixed = 1;
4126 $rtrim_before = 1;
4127 }
4128 }
4129 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) {
4130 if (ERROR("SPACING",
4131 "space required after that '$op' $at\n" . $hereptr)) {
4132 $line_fixed = 1;
4133 $last_after = $n;
4134 $space_after = 1;
4135 }
4136 }
4137 if ($rtrim_before || $space_after) {
4138 if ($rtrim_before) {
4139 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4140 } else {
4141 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
4142 }
4143 if ($space_after) {
4144 $good .= " ";
4145 }
4146 }
4147
4148 # '*' as part of a type definition -- reported already.
4149 } elsif ($opv eq '*_') {
4150 #warn "'*' is part of type\n";
4151
4152 # unary operators should have a space before and
4153 # none after. May be left adjacent to another
4154 # unary operator, or a cast
4155 } elsif ($op eq '!' || $op eq '~' ||
4156 $opv eq '*U' || $opv eq '-U' ||
4157 $opv eq '&U' || $opv eq '&&U') {
4158 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) {
4159 if (ERROR("SPACING",
4160 "space required before that '$op' $at\n" . $hereptr)) {
4161 if ($n != $last_after + 2) {
4162 $good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]);
4163 $line_fixed = 1;
4164 }
4165 }
4166 }
4167 if ($op eq '*' && $cc =~/\s*$Modifier\b/) {
4168 # A unary '*' may be const
4169
4170 } elsif ($ctx =~ /.xW/) {
4171 if (ERROR("SPACING",
4172 "space prohibited after that '$op' $at\n" . $hereptr)) {
4173 $good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]);
4174 if (defined $fix_elements[$n + 2]) {
4175 $fix_elements[$n + 2] =~ s/^\s+//;
4176 }
4177 $line_fixed = 1;
4178 }
4179 }
4180
4181 # unary ++ and unary -- are allowed no space on one side.
4182 } elsif ($op eq '++' or $op eq '--') {
4183 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) {
4184 if (ERROR("SPACING",
4185 "space required one side of that '$op' $at\n" . $hereptr)) {
4186 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " ";
4187 $line_fixed = 1;
4188 }
4189 }
4190 if ($ctx =~ /Wx[BE]/ ||
4191 ($ctx =~ /Wx./ && $cc =~ /^;/)) {
4192 if (ERROR("SPACING",
4193 "space prohibited before that '$op' $at\n" . $hereptr)) {
4194 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4195 $line_fixed = 1;
4196 }
4197 }
4198 if ($ctx =~ /ExW/) {
4199 if (ERROR("SPACING",
4200 "space prohibited after that '$op' $at\n" . $hereptr)) {
4201 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]);
4202 if (defined $fix_elements[$n + 2]) {
4203 $fix_elements[$n + 2] =~ s/^\s+//;
4204 }
4205 $line_fixed = 1;
4206 }
4207 }
4208
4209 # << and >> may either have or not have spaces both sides
4210 } elsif ($op eq '<<' or $op eq '>>' or
4211 $op eq '&' or $op eq '^' or $op eq '|' or
4212 $op eq '+' or $op eq '-' or
4213 $op eq '*' or $op eq '/' or
4214 $op eq '%')
4215 {
4216 if ($check) {
4217 if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) {
4218 if (CHK("SPACING",
4219 "spaces preferred around that '$op' $at\n" . $hereptr)) {
4220 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4221 $fix_elements[$n + 2] =~ s/^\s+//;
4222 $line_fixed = 1;
4223 }
4224 } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) {
4225 if (CHK("SPACING",
4226 "space preferred before that '$op' $at\n" . $hereptr)) {
4227 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]);
4228 $line_fixed = 1;
4229 }
4230 }
4231 } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) {
4232 if (ERROR("SPACING",
4233 "need consistent spacing around '$op' $at\n" . $hereptr)) {
4234 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4235 if (defined $fix_elements[$n + 2]) {
4236 $fix_elements[$n + 2] =~ s/^\s+//;
4237 }
4238 $line_fixed = 1;
4239 }
4240 }
4241
4242 # A colon needs no spaces before when it is
4243 # terminating a case value or a label.
4244 } elsif ($opv eq ':C' || $opv eq ':L') {
4245 if ($ctx =~ /Wx./) {
4246 if (ERROR("SPACING",
4247 "space prohibited before that '$op' $at\n" . $hereptr)) {
4248 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]);
4249 $line_fixed = 1;
4250 }
4251 }
4252
4253 # All the others need spaces both sides.
4254 } elsif ($ctx !~ /[EWC]x[CWE]/) {
4255 my $ok = 0;
4256
4257 # Ignore email addresses <foo@bar>
4258 if (($op eq '<' &&
4259 $cc =~ /^\S+\@\S+>/) ||
4260 ($op eq '>' &&
4261 $ca =~ /<\S+\@\S+$/))
4262 {
4263 $ok = 1;
4264 }
4265
4266 # for asm volatile statements
4267 # ignore a colon with another
4268 # colon immediately before or after
4269 if (($op eq ':') &&
4270 ($ca =~ /:$/ || $cc =~ /^:/)) {
4271 $ok = 1;
4272 }
4273
4274 # messages are ERROR, but ?: are CHK
4275 if ($ok == 0) {
4276 my $msg_type = \&ERROR;
4277 $msg_type = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/);
4278
4279 if (&{$msg_type}("SPACING",
4280 "spaces required around that '$op' $at\n" . $hereptr)) {
4281 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " ";
4282 if (defined $fix_elements[$n + 2]) {
4283 $fix_elements[$n + 2] =~ s/^\s+//;
4284 }
4285 $line_fixed = 1;
4286 }
4287 }
4288 }
4289 $off += length($elements[$n + 1]);
4290
4291## print("n: <$n> GOOD: <$good>\n");
4292
4293 $fixed_line = $fixed_line . $good;
4294 }
4295
4296 if (($#elements % 2) == 0) {
4297 $fixed_line = $fixed_line . $fix_elements[$#elements];
4298 }
4299
4300 if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) {
4301 $fixed[$fixlinenr] = $fixed_line;
4302 }
4303
4304
4305 }
4306
4307# check for whitespace before a non-naked semicolon
4308 if ($line =~ /^\+.*\S\s+;\s*$/) {
4309 if (WARN("SPACING",
4310 "space prohibited before semicolon\n" . $herecurr) &&
4311 $fix) {
4312 1 while $fixed[$fixlinenr] =~
4313 s/^(\+.*\S)\s+;/$1;/;
4314 }
4315 }
4316
4317# check for multiple assignments
4318 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
4319 CHK("MULTIPLE_ASSIGNMENTS",
4320 "multiple assignments should be avoided\n" . $herecurr);
4321 }
4322
4323## # check for multiple declarations, allowing for a function declaration
4324## # continuation.
4325## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ &&
4326## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) {
4327##
4328## # Remove any bracketed sections to ensure we do not
4329## # falsly report the parameters of functions.
4330## my $ln = $line;
4331## while ($ln =~ s/\([^\(\)]*\)//g) {
4332## }
4333## if ($ln =~ /,/) {
4334## WARN("MULTIPLE_DECLARATION",
4335## "declaring multiple variables together should be avoided\n" . $herecurr);
4336## }
4337## }
4338
4339#need space before brace following if, while, etc
4340 if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
4341 $line =~ /do\{/) {
4342 if (ERROR("SPACING",
4343 "space required before the open brace '{'\n" . $herecurr) &&
4344 $fix) {
4345 $fixed[$fixlinenr] =~ s/^(\+.*(?:do|\))){/$1 {/;
4346 }
4347 }
4348
4349## # check for blank lines before declarations
4350## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ &&
4351## $prevrawline =~ /^.\s*$/) {
4352## WARN("SPACING",
4353## "No blank lines before declarations\n" . $hereprev);
4354## }
4355##
4356
4357# closing brace should have a space following it when it has anything
4358# on the line
4359 if ($line =~ /}(?!(?:,|;|\)))\S/) {
4360 if (ERROR("SPACING",
4361 "space required after that close brace '}'\n" . $herecurr) &&
4362 $fix) {
4363 $fixed[$fixlinenr] =~
4364 s/}((?!(?:,|;|\)))\S)/} $1/;
4365 }
4366 }
4367
4368# check spacing on square brackets
4369 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) {
4370 if (ERROR("SPACING",
4371 "space prohibited after that open square bracket '['\n" . $herecurr) &&
4372 $fix) {
4373 $fixed[$fixlinenr] =~
4374 s/\[\s+/\[/;
4375 }
4376 }
4377 if ($line =~ /\s\]/) {
4378 if (ERROR("SPACING",
4379 "space prohibited before that close square bracket ']'\n" . $herecurr) &&
4380 $fix) {
4381 $fixed[$fixlinenr] =~
4382 s/\s+\]/\]/;
4383 }
4384 }
4385
4386# check spacing on parentheses
4387 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ &&
4388 $line !~ /for\s*\(\s+;/) {
4389 if (ERROR("SPACING",
4390 "space prohibited after that open parenthesis '('\n" . $herecurr) &&
4391 $fix) {
4392 $fixed[$fixlinenr] =~
4393 s/\(\s+/\(/;
4394 }
4395 }
4396 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ &&
4397 $line !~ /for\s*\(.*;\s+\)/ &&
4398 $line !~ /:\s+\)/) {
4399 if (ERROR("SPACING",
4400 "space prohibited before that close parenthesis ')'\n" . $herecurr) &&
4401 $fix) {
4402 $fixed[$fixlinenr] =~
4403 s/\s+\)/\)/;
4404 }
4405 }
4406
4407# check unnecessary parentheses around addressof/dereference single $Lvals
4408# ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar
4409
4410 while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) {
4411 my $var = $1;
4412 if (CHK("UNNECESSARY_PARENTHESES",
4413 "Unnecessary parentheses around $var\n" . $herecurr) &&
4414 $fix) {
4415 $fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/;
4416 }
4417 }
4418
4419# check for unnecessary parentheses around function pointer uses
4420# ie: (foo->bar)(); should be foo->bar();
4421# but not "if (foo->bar) (" to avoid some false positives
4422 if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) {
4423 my $var = $2;
4424 if (CHK("UNNECESSARY_PARENTHESES",
4425 "Unnecessary parentheses around function pointer $var\n" . $herecurr) &&
4426 $fix) {
4427 my $var2 = deparenthesize($var);
4428 $var2 =~ s/\s//g;
4429 $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/;
4430 }
4431 }
4432
4433#goto labels aren't indented, allow a single space however
4434 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and
4435 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) {
4436 if (WARN("INDENTED_LABEL",
4437 "labels should not be indented\n" . $herecurr) &&
4438 $fix) {
4439 $fixed[$fixlinenr] =~
4440 s/^(.)\s+/$1/;
4441 }
4442 }
4443
4444# return is not a function
4445 if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) {
4446 my $spacing = $1;
4447 if ($^V && $^V ge 5.10.0 &&
4448 $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) {
4449 my $value = $1;
4450 $value = deparenthesize($value);
4451 if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) {
4452 ERROR("RETURN_PARENTHESES",
4453 "return is not a function, parentheses are not required\n" . $herecurr);
4454 }
4455 } elsif ($spacing !~ /\s+/) {
4456 ERROR("SPACING",
4457 "space required before the open parenthesis '('\n" . $herecurr);
4458 }
4459 }
4460
4461# unnecessary return in a void function
4462# at end-of-function, with the previous line a single leading tab, then return;
4463# and the line before that not a goto label target like "out:"
4464 if ($sline =~ /^[ \+]}\s*$/ &&
4465 $prevline =~ /^\+\treturn\s*;\s*$/ &&
4466 $linenr >= 3 &&
4467 $lines[$linenr - 3] =~ /^[ +]/ &&
4468 $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) {
4469 WARN("RETURN_VOID",
4470 "void function return statements are not generally useful\n" . $hereprev);
4471 }
4472
4473# if statements using unnecessary parentheses - ie: if ((foo == bar))
4474 if ($^V && $^V ge 5.10.0 &&
4475 $line =~ /\bif\s*((?:\(\s*){2,})/) {
4476 my $openparens = $1;
4477 my $count = $openparens =~ tr@\(@\(@;
4478 my $msg = "";
4479 if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) {
4480 my $comp = $4; #Not $1 because of $LvalOrFunc
4481 $msg = " - maybe == should be = ?" if ($comp eq "==");
4482 WARN("UNNECESSARY_PARENTHESES",
4483 "Unnecessary parentheses$msg\n" . $herecurr);
4484 }
4485 }
4486
4487# comparisons with a constant or upper case identifier on the left
4488# avoid cases like "foo + BAR < baz"
4489# only fix matches surrounded by parentheses to avoid incorrect
4490# conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5"
4491 if ($^V && $^V ge 5.10.0 &&
4492 $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) {
4493 my $lead = $1;
4494 my $const = $2;
4495 my $comp = $3;
4496 my $to = $4;
4497 my $newcomp = $comp;
4498 if ($lead !~ /(?:$Operators|\.)\s*$/ &&
4499 $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ &&
4500 WARN("CONSTANT_COMPARISON",
4501 "Comparisons should place the constant on the right side of the test\n" . $herecurr) &&
4502 $fix) {
4503 if ($comp eq "<") {
4504 $newcomp = ">";
4505 } elsif ($comp eq "<=") {
4506 $newcomp = ">=";
4507 } elsif ($comp eq ">") {
4508 $newcomp = "<";
4509 } elsif ($comp eq ">=") {
4510 $newcomp = "<=";
4511 }
4512 $fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/;
4513 }
4514 }
4515
4516# Return of what appears to be an errno should normally be negative
4517 if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
4518 my $name = $1;
4519 if ($name ne 'EOF' && $name ne 'ERROR') {
4520 WARN("USE_NEGATIVE_ERRNO",
4521 "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
4522 }
4523 }
4524
4525# Need a space before open parenthesis after if, while etc
4526 if ($line =~ /\b(if|while|for|switch)\(/) {
4527 if (ERROR("SPACING",
4528 "space required before the open parenthesis '('\n" . $herecurr) &&
4529 $fix) {
4530 $fixed[$fixlinenr] =~
4531 s/\b(if|while|for|switch)\(/$1 \(/;
4532 }
4533 }
4534
4535# Check for illegal assignment in if conditional -- and check for trailing
4536# statements after the conditional.
4537 if ($line =~ /do\s*(?!{)/) {
4538 ($stat, $cond, $line_nr_next, $remain_next, $off_next) =
4539 ctx_statement_block($linenr, $realcnt, 0)
4540 if (!defined $stat);
4541 my ($stat_next) = ctx_statement_block($line_nr_next,
4542 $remain_next, $off_next);
4543 $stat_next =~ s/\n./\n /g;
4544 ##print "stat<$stat> stat_next<$stat_next>\n";
4545
4546 if ($stat_next =~ /^\s*while\b/) {
4547 # If the statement carries leading newlines,
4548 # then count those as offsets.
4549 my ($whitespace) =
4550 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s);
4551 my $offset =
4552 statement_rawlines($whitespace) - 1;
4553
4554 $suppress_whiletrailers{$line_nr_next +
4555 $offset} = 1;
4556 }
4557 }
4558 if (!defined $suppress_whiletrailers{$linenr} &&
4559 defined($stat) && defined($cond) &&
4560 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) {
4561 my ($s, $c) = ($stat, $cond);
4562
4563 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) {
4564 ERROR("ASSIGN_IN_IF",
4565 "do not use assignment in if condition\n" . $herecurr);
4566 }
4567
4568 # Find out what is on the end of the line after the
4569 # conditional.
4570 substr($s, 0, length($c), '');
4571 $s =~ s/\n.*//g;
4572 $s =~ s/$;//g; # Remove any comments
4573 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
4574 $c !~ /}\s*while\s*/)
4575 {
4576 # Find out how long the conditional actually is.
4577 my @newlines = ($c =~ /\n/gs);
4578 my $cond_lines = 1 + $#newlines;
4579 my $stat_real = '';
4580
4581 $stat_real = raw_line($linenr, $cond_lines)
4582 . "\n" if ($cond_lines);
4583 if (defined($stat_real) && $cond_lines > 1) {
4584 $stat_real = "[...]\n$stat_real";
4585 }
4586
4587 ERROR("TRAILING_STATEMENTS",
4588 "trailing statements should be on next line\n" . $herecurr . $stat_real);
4589 }
4590 }
4591
4592# Check for bitwise tests written as boolean
4593 if ($line =~ /
4594 (?:
4595 (?:\[|\(|\&\&|\|\|)
4596 \s*0[xX][0-9]+\s*
4597 (?:\&\&|\|\|)
4598 |
4599 (?:\&\&|\|\|)
4600 \s*0[xX][0-9]+\s*
4601 (?:\&\&|\|\||\)|\])
4602 )/x)
4603 {
4604 WARN("HEXADECIMAL_BOOLEAN_TEST",
4605 "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr);
4606 }
4607
4608# if and else should not have general statements after it
4609 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
4610 my $s = $1;
4611 $s =~ s/$;//g; # Remove any comments
4612 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
4613 ERROR("TRAILING_STATEMENTS",
4614 "trailing statements should be on next line\n" . $herecurr);
4615 }
4616 }
4617# if should not continue a brace
4618 if ($line =~ /}\s*if\b/) {
4619 ERROR("TRAILING_STATEMENTS",
4620 "trailing statements should be on next line (or did you mean 'else if'?)\n" .
4621 $herecurr);
4622 }
4623# case and default should not have general statements after them
4624 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g &&
4625 $line !~ /\G(?:
4626 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$|
4627 \s*return\s+
4628 )/xg)
4629 {
4630 ERROR("TRAILING_STATEMENTS",
4631 "trailing statements should be on next line\n" . $herecurr);
4632 }
4633
4634 # Check for }<nl>else {, these must be at the same
4635 # indent level to be relevant to each other.
4636 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ &&
4637 $previndent == $indent) {
4638 if (ERROR("ELSE_AFTER_BRACE",
4639 "else should follow close brace '}'\n" . $hereprev) &&
4640 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4641 fix_delete_line($fixlinenr - 1, $prevrawline);
4642 fix_delete_line($fixlinenr, $rawline);
4643 my $fixedline = $prevrawline;
4644 $fixedline =~ s/}\s*$//;
4645 if ($fixedline !~ /^\+\s*$/) {
4646 fix_insert_line($fixlinenr, $fixedline);
4647 }
4648 $fixedline = $rawline;
4649 $fixedline =~ s/^(.\s*)else/$1} else/;
4650 fix_insert_line($fixlinenr, $fixedline);
4651 }
4652 }
4653
4654 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ &&
4655 $previndent == $indent) {
4656 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0);
4657
4658 # Find out what is on the end of the line after the
4659 # conditional.
4660 substr($s, 0, length($c), '');
4661 $s =~ s/\n.*//g;
4662
4663 if ($s =~ /^\s*;/) {
4664 if (ERROR("WHILE_AFTER_BRACE",
4665 "while should follow close brace '}'\n" . $hereprev) &&
4666 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) {
4667 fix_delete_line($fixlinenr - 1, $prevrawline);
4668 fix_delete_line($fixlinenr, $rawline);
4669 my $fixedline = $prevrawline;
4670 my $trailing = $rawline;
4671 $trailing =~ s/^\+//;
4672 $trailing = trim($trailing);
4673 $fixedline =~ s/}\s*$/} $trailing/;
4674 fix_insert_line($fixlinenr, $fixedline);
4675 }
4676 }
4677 }
4678
4679#Specific variable tests
4680 while ($line =~ m{($Constant|$Lval)}g) {
4681 my $var = $1;
4682
4683#gcc binary extension
4684 if ($var =~ /^$Binary$/) {
4685 if (WARN("GCC_BINARY_CONSTANT",
4686 "Avoid gcc v4.3+ binary constant extension: <$var>\n" . $herecurr) &&
4687 $fix) {
4688 my $hexval = sprintf("0x%x", oct($var));
4689 $fixed[$fixlinenr] =~
4690 s/\b$var\b/$hexval/;
4691 }
4692 }
4693
4694#CamelCase
4695 if ($var !~ /^$Constant$/ &&
4696 $var =~ /[A-Z][a-z]|[a-z][A-Z]/ &&
4697#Ignore Page<foo> variants
4698 $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ &&
4699#Ignore SI style variants like nS, mV and dB (ie: max_uV, regulator_min_uA_show)
4700 $var !~ /^(?:[a-z_]*?)_?[a-z][A-Z](?:_[a-z_]+)?$/ &&
4701#Ignore some three character SI units explicitly, like MiB and KHz
4702 $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
4703 while ($var =~ m{($Ident)}g) {
4704 my $word = $1;
4705 next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
4706 if ($check) {
4707 seed_camelcase_includes();
4708 if (!$file && !$camelcase_file_seeded) {
4709 seed_camelcase_file($realfile);
4710 $camelcase_file_seeded = 1;
4711 }
4712 }
4713 if (!defined $camelcase{$word}) {
4714 $camelcase{$word} = 1;
4715 CHK("CAMELCASE",
4716 "Avoid CamelCase: <$word>\n" . $herecurr);
4717 }
4718 }
4719 }
4720 }
4721
4722#no spaces allowed after \ in define
4723 if ($line =~ /\#\s*define.*\\\s+$/) {
4724 if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION",
4725 "Whitespace after \\ makes next lines useless\n" . $herecurr) &&
4726 $fix) {
4727 $fixed[$fixlinenr] =~ s/\s+$//;
4728 }
4729 }
4730
4731# warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes
4732# itself <asm/foo.h> (uses RAW line)
4733 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) {
4734 my $file = "$1.h";
4735 my $checkfile = "include/linux/$file";
4736 if (-f "$root/$checkfile" &&
4737 $realfile ne $checkfile &&
4738 $1 !~ /$allowed_asm_includes/)
4739 {
4740 my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`;
4741 if ($asminclude > 0) {
4742 if ($realfile =~ m{^arch/}) {
4743 CHK("ARCH_INCLUDE_LINUX",
4744 "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
4745 } else {
4746 WARN("INCLUDE_LINUX",
4747 "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr);
4748 }
4749 }
4750 }
4751 }
4752
4753# multi-statement macros should be enclosed in a do while loop, grab the
4754# first statement and ensure its the whole macro if its not enclosed
4755# in a known good container
4756 if ($realfile !~ m@/vmlinux.lds.h$@ &&
4757 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) {
4758 my $ln = $linenr;
4759 my $cnt = $realcnt;
4760 my ($off, $dstat, $dcond, $rest);
4761 my $ctx = '';
4762 my $has_flow_statement = 0;
4763 my $has_arg_concat = 0;
4764 ($dstat, $dcond, $ln, $cnt, $off) =
4765 ctx_statement_block($linenr, $realcnt, 0);
4766 $ctx = $dstat;
4767 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n";
4768 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n";
4769
4770 $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/);
4771 $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/);
4772
4773 $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//;
4774 my $define_args = $1;
4775 my $define_stmt = $dstat;
4776 my @def_args = ();
4777
4778 if (defined $define_args && $define_args ne "") {
4779 $define_args = substr($define_args, 1, length($define_args) - 2);
4780 $define_args =~ s/\s*//g;
4781 @def_args = split(",", $define_args);
4782 }
4783
4784 $dstat =~ s/$;//g;
4785 $dstat =~ s/\\\n.//g;
4786 $dstat =~ s/^\s*//s;
4787 $dstat =~ s/\s*$//s;
4788
4789 # Flatten any parentheses and braces
4790 while ($dstat =~ s/\([^\(\)]*\)/1/ ||
4791 $dstat =~ s/\{[^\{\}]*\}/1/ ||
4792 $dstat =~ s/.\[[^\[\]]*\]/1/)
4793 {
4794 }
4795
4796 # Flatten any obvious string concatentation.
4797 while ($dstat =~ s/($String)\s*$Ident/$1/ ||
4798 $dstat =~ s/$Ident\s*($String)/$1/)
4799 {
4800 }
4801
4802 # Make asm volatile uses seem like a generic function
4803 $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g;
4804
4805 my $exceptions = qr{
4806 $Declare|
4807 module_param_named|
4808 MODULE_PARM_DESC|
4809 DECLARE_PER_CPU|
4810 DEFINE_PER_CPU|
4811 __typeof__\(|
4812 union|
4813 struct|
4814 \.$Ident\s*=\s*|
4815 ^\"|\"$|
4816 ^\[
4817 }x;
4818 #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n";
4819
4820 $ctx =~ s/\n*$//;
4821 my $herectx = $here . "\n";
4822 my $stmt_cnt = statement_rawlines($ctx);
4823
4824 for (my $n = 0; $n < $stmt_cnt; $n++) {
4825 $herectx .= raw_line($linenr, $n) . "\n";
4826 }
4827
4828 if ($dstat ne '' &&
4829 $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(),
4830 $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo();
4831 $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz
4832 $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ && # character constants
4833 $dstat !~ /$exceptions/ &&
4834 $dstat !~ /^\.$Ident\s*=/ && # .foo =
4835 $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo
4836 $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...)
4837 $dstat !~ /^for\s*$Constant$/ && # for (...)
4838 $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar()
4839 $dstat !~ /^do\s*{/ && # do {...
4840 $dstat !~ /^\(\{/ && # ({...
4841 $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/)
4842 {
4843
4844 if ($dstat =~ /;/) {
4845 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE",
4846 "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx");
4847 } else {
4848 ERROR("COMPLEX_MACRO",
4849 "Macros with complex values should be enclosed in parentheses\n" . "$herectx");
4850 }
4851
4852 }
4853
4854 # Make $define_stmt single line, comment-free, etc
4855 my @stmt_array = split('\n', $define_stmt);
4856 my $first = 1;
4857 $define_stmt = "";
4858 foreach my $l (@stmt_array) {
4859 $l =~ s/\\$//;
4860 if ($first) {
4861 $define_stmt = $l;
4862 $first = 0;
4863 } elsif ($l =~ /^[\+ ]/) {
4864 $define_stmt .= substr($l, 1);
4865 }
4866 }
4867 $define_stmt =~ s/$;//g;
4868 $define_stmt =~ s/\s+/ /g;
4869 $define_stmt = trim($define_stmt);
4870
4871# check if any macro arguments are reused (ignore '...' and 'type')
4872 foreach my $arg (@def_args) {
4873 next if ($arg =~ /\.\.\./);
4874 next if ($arg =~ /^type$/i);
4875 my $tmp = $define_stmt;
4876 $tmp =~ s/\b(typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
4877 $tmp =~ s/\#+\s*$arg\b//g;
4878 $tmp =~ s/\b$arg\s*\#\#//g;
4879 my $use_cnt = $tmp =~ s/\b$arg\b//g;
4880 if ($use_cnt > 1) {
4881 CHK("MACRO_ARG_REUSE",
4882 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx");
4883 }
4884# check if any macro arguments may have other precedence issues
4885 if ($define_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m &&
4886 ((defined($1) && $1 ne ',') ||
4887 (defined($2) && $2 ne ','))) {
4888 CHK("MACRO_ARG_PRECEDENCE",
4889 "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx");
4890 }
4891 }
4892
4893# check for macros with flow control, but without ## concatenation
4894# ## concatenation is commonly a macro that defines a function so ignore those
4895 if ($has_flow_statement && !$has_arg_concat) {
4896 my $herectx = $here . "\n";
4897 my $cnt = statement_rawlines($ctx);
4898
4899 for (my $n = 0; $n < $cnt; $n++) {
4900 $herectx .= raw_line($linenr, $n) . "\n";
4901 }
4902 WARN("MACRO_WITH_FLOW_CONTROL",
4903 "Macros with flow control statements should be avoided\n" . "$herectx");
4904 }
4905
4906# check for line continuations outside of #defines, preprocessor #, and asm
4907
4908 } else {
4909 if ($prevline !~ /^..*\\$/ &&
4910 $line !~ /^\+\s*\#.*\\$/ && # preprocessor
4911 $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ && # asm
4912 $line =~ /^\+.*\\$/) {
4913 WARN("LINE_CONTINUATIONS",
4914 "Avoid unnecessary line continuations\n" . $herecurr);
4915 }
4916 }
4917
4918# do {} while (0) macro tests:
4919# single-statement macros do not need to be enclosed in do while (0) loop,
4920# macro should not end with a semicolon
4921 if ($^V && $^V ge 5.10.0 &&
4922 $realfile !~ m@/vmlinux.lds.h$@ &&
4923 $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) {
4924 my $ln = $linenr;
4925 my $cnt = $realcnt;
4926 my ($off, $dstat, $dcond, $rest);
4927 my $ctx = '';
4928 ($dstat, $dcond, $ln, $cnt, $off) =
4929 ctx_statement_block($linenr, $realcnt, 0);
4930 $ctx = $dstat;
4931
4932 $dstat =~ s/\\\n.//g;
4933 $dstat =~ s/$;/ /g;
4934
4935 if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) {
4936 my $stmts = $2;
4937 my $semis = $3;
4938
4939 $ctx =~ s/\n*$//;
4940 my $cnt = statement_rawlines($ctx);
4941 my $herectx = $here . "\n";
4942
4943 for (my $n = 0; $n < $cnt; $n++) {
4944 $herectx .= raw_line($linenr, $n) . "\n";
4945 }
4946
4947 if (($stmts =~ tr/;/;/) == 1 &&
4948 $stmts !~ /^\s*(if|while|for|switch)\b/) {
4949 WARN("SINGLE_STATEMENT_DO_WHILE_MACRO",
4950 "Single statement macros should not use a do {} while (0) loop\n" . "$herectx");
4951 }
4952 if (defined $semis && $semis ne "") {
4953 WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON",
4954 "do {} while (0) macros should not be semicolon terminated\n" . "$herectx");
4955 }
4956 } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) {
4957 $ctx =~ s/\n*$//;
4958 my $cnt = statement_rawlines($ctx);
4959 my $herectx = $here . "\n";
4960
4961 for (my $n = 0; $n < $cnt; $n++) {
4962 $herectx .= raw_line($linenr, $n) . "\n";
4963 }
4964
4965 WARN("TRAILING_SEMICOLON",
4966 "macros should not use a trailing semicolon\n" . "$herectx");
4967 }
4968 }
4969
4970# make sure symbols are always wrapped with VMLINUX_SYMBOL() ...
4971# all assignments may have only one of the following with an assignment:
4972# .
4973# ALIGN(...)
4974# VMLINUX_SYMBOL(...)
4975 if ($realfile eq 'vmlinux.lds.h' && $line =~ /(?:(?:^|\s)$Ident\s*=|=\s*$Ident(?:\s|$))/) {
4976 WARN("MISSING_VMLINUX_SYMBOL",
4977 "vmlinux.lds.h needs VMLINUX_SYMBOL() around C-visible symbols\n" . $herecurr);
4978 }
4979
4980# check for redundant bracing round if etc
4981 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) {
4982 my ($level, $endln, @chunks) =
4983 ctx_statement_full($linenr, $realcnt, 1);
4984 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
4985 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
4986 if ($#chunks > 0 && $level == 0) {
4987 my @allowed = ();
4988 my $allow = 0;
4989 my $seen = 0;
4990 my $herectx = $here . "\n";
4991 my $ln = $linenr - 1;
4992 for my $chunk (@chunks) {
4993 my ($cond, $block) = @{$chunk};
4994
4995 # If the condition carries leading newlines, then count those as offsets.
4996 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
4997 my $offset = statement_rawlines($whitespace) - 1;
4998
4999 $allowed[$allow] = 0;
5000 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
5001
5002 # We have looked at and allowed this specific line.
5003 $suppress_ifbraces{$ln + $offset} = 1;
5004
5005 $herectx .= "$rawlines[$ln + $offset]\n[...]\n";
5006 $ln += statement_rawlines($block) - 1;
5007
5008 substr($block, 0, length($cond), '');
5009
5010 $seen++ if ($block =~ /^\s*{/);
5011
5012 #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n";
5013 if (statement_lines($cond) > 1) {
5014 #print "APW: ALLOWED: cond<$cond>\n";
5015 $allowed[$allow] = 1;
5016 }
5017 if ($block =~/\b(?:if|for|while)\b/) {
5018 #print "APW: ALLOWED: block<$block>\n";
5019 $allowed[$allow] = 1;
5020 }
5021 if (statement_block_size($block) > 1) {
5022 #print "APW: ALLOWED: lines block<$block>\n";
5023 $allowed[$allow] = 1;
5024 }
5025 $allow++;
5026 }
5027 if ($seen) {
5028 my $sum_allowed = 0;
5029 foreach (@allowed) {
5030 $sum_allowed += $_;
5031 }
5032 if ($sum_allowed == 0) {
5033 WARN("BRACES",
5034 "braces {} are not necessary for any arm of this statement\n" . $herectx);
5035 } elsif ($sum_allowed != $allow &&
5036 $seen != $allow) {
5037 CHK("BRACES",
5038 "braces {} should be used on all arms of this statement\n" . $herectx);
5039 }
5040 }
5041 }
5042 }
5043 if (!defined $suppress_ifbraces{$linenr - 1} &&
5044 $line =~ /\b(if|while|for|else)\b/) {
5045 my $allowed = 0;
5046
5047 # Check the pre-context.
5048 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) {
5049 #print "APW: ALLOWED: pre<$1>\n";
5050 $allowed = 1;
5051 }
5052
5053 my ($level, $endln, @chunks) =
5054 ctx_statement_full($linenr, $realcnt, $-[0]);
5055
5056 # Check the condition.
5057 my ($cond, $block) = @{$chunks[0]};
5058 #print "CHECKING<$linenr> cond<$cond> block<$block>\n";
5059 if (defined $cond) {
5060 substr($block, 0, length($cond), '');
5061 }
5062 if (statement_lines($cond) > 1) {
5063 #print "APW: ALLOWED: cond<$cond>\n";
5064 $allowed = 1;
5065 }
5066 if ($block =~/\b(?:if|for|while)\b/) {
5067 #print "APW: ALLOWED: block<$block>\n";
5068 $allowed = 1;
5069 }
5070 if (statement_block_size($block) > 1) {
5071 #print "APW: ALLOWED: lines block<$block>\n";
5072 $allowed = 1;
5073 }
5074 # Check the post-context.
5075 if (defined $chunks[1]) {
5076 my ($cond, $block) = @{$chunks[1]};
5077 if (defined $cond) {
5078 substr($block, 0, length($cond), '');
5079 }
5080 if ($block =~ /^\s*\{/) {
5081 #print "APW: ALLOWED: chunk-1 block<$block>\n";
5082 $allowed = 1;
5083 }
5084 }
5085 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) {
5086 my $herectx = $here . "\n";
5087 my $cnt = statement_rawlines($block);
5088
5089 for (my $n = 0; $n < $cnt; $n++) {
5090 $herectx .= raw_line($linenr, $n) . "\n";
5091 }
5092
5093 WARN("BRACES",
5094 "braces {} are not necessary for single statement blocks\n" . $herectx);
5095 }
5096 }
5097
5098# check for unnecessary blank lines around braces
5099 if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) {
5100 if (CHK("BRACES",
5101 "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) &&
5102 $fix && $prevrawline =~ /^\+/) {
5103 fix_delete_line($fixlinenr - 1, $prevrawline);
5104 }
5105 }
5106 if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) {
5107 if (CHK("BRACES",
5108 "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) &&
5109 $fix) {
5110 fix_delete_line($fixlinenr, $rawline);
5111 }
5112 }
5113
5114# no volatiles please
5115 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b};
5116 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) {
5117 WARN("VOLATILE",
5118 "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr);
5119 }
5120
5121# Check for user-visible strings broken across lines, which breaks the ability
5122# to grep for the string. Make exceptions when the previous string ends in a
5123# newline (multiple lines in one string constant) or '\t', '\r', ';', or '{'
5124# (common in inline assembly) or is a octal \123 or hexadecimal \xaf value
5125 if ($line =~ /^\+\s*$String/ &&
5126 $prevline =~ /"\s*$/ &&
5127 $prevrawline !~ /(?:\\(?:[ntr]|[0-7]{1,3}|x[0-9a-fA-F]{1,2})|;\s*|\{\s*)"\s*$/) {
5128 if (WARN("SPLIT_STRING",
5129 "quoted string split across lines\n" . $hereprev) &&
5130 $fix &&
5131 $prevrawline =~ /^\+.*"\s*$/ &&
5132 $last_coalesced_string_linenr != $linenr - 1) {
5133 my $extracted_string = get_quoted_string($line, $rawline);
5134 my $comma_close = "";
5135 if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) {
5136 $comma_close = $1;
5137 }
5138
5139 fix_delete_line($fixlinenr - 1, $prevrawline);
5140 fix_delete_line($fixlinenr, $rawline);
5141 my $fixedline = $prevrawline;
5142 $fixedline =~ s/"\s*$//;
5143 $fixedline .= substr($extracted_string, 1) . trim($comma_close);
5144 fix_insert_line($fixlinenr - 1, $fixedline);
5145 $fixedline = $rawline;
5146 $fixedline =~ s/\Q$extracted_string\E\Q$comma_close\E//;
5147 if ($fixedline !~ /\+\s*$/) {
5148 fix_insert_line($fixlinenr, $fixedline);
5149 }
5150 $last_coalesced_string_linenr = $linenr;
5151 }
5152 }
5153
5154# check for missing a space in a string concatenation
5155 if ($prevrawline =~ /[^\\]\w"$/ && $rawline =~ /^\+[\t ]+"\w/) {
5156 WARN('MISSING_SPACE',
5157 "break quoted strings at a space character\n" . $hereprev);
5158 }
5159
5160# check for spaces before a quoted newline
5161 if ($rawline =~ /^.*\".*\s\\n/) {
5162 if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE",
5163 "unnecessary whitespace before a quoted newline\n" . $herecurr) &&
5164 $fix) {
5165 $fixed[$fixlinenr] =~ s/^(\+.*\".*)\s+\\n/$1\\n/;
5166 }
5167
5168 }
5169
5170# concatenated string without spaces between elements
5171 if ($line =~ /$String[A-Z_]/ || $line =~ /[A-Za-z0-9_]$String/) {
5172 CHK("CONCATENATED_STRING",
5173 "Concatenated strings should use spaces between elements\n" . $herecurr);
5174 }
5175
5176# uncoalesced string fragments
5177 if ($line =~ /$String\s*"/) {
5178 WARN("STRING_FRAGMENTS",
5179 "Consecutive strings are generally better as a single string\n" . $herecurr);
5180 }
5181
5182# check for %L{u,d,i} and 0x%[udi] in strings
5183 my $string;
5184 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) {
5185 $string = substr($rawline, $-[1], $+[1] - $-[1]);
5186 $string =~ s/%%/__/g;
5187 if ($string =~ /(?<!%)%[\*\d\.\$]*L[udi]/) {
5188 WARN("PRINTF_L",
5189 "\%Ld/%Lu are not-standard C, use %lld/%llu\n" . $herecurr);
5190 last;
5191 }
5192 if ($string =~ /0x%[\*\d\.\$\Llzth]*[udi]/) {
5193 ERROR("PRINTF_0xDECIMAL",
5194 "Prefixing 0x with decimal output is defective\n" . $herecurr);
5195 }
5196 }
5197
5198# check for line continuations in quoted strings with odd counts of "
5199 if ($rawline =~ /\\$/ && $rawline =~ tr/"/"/ % 2) {
5200 WARN("LINE_CONTINUATIONS",
5201 "Avoid line continuations in quoted strings\n" . $herecurr);
5202 }
5203
5204# warn about #if 0
5205 if ($line =~ /^.\s*\#\s*if\s+0\b/) {
5206 CHK("REDUNDANT_CODE",
5207 "if this code is redundant consider removing it\n" .
5208 $herecurr);
5209 }
5210
5211# check for needless "if (<foo>) fn(<foo>)" uses
5212 if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) {
5213 my $tested = quotemeta($1);
5214 my $expr = '\s*\(\s*' . $tested . '\s*\)\s*;';
5215 if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?|(?:kmem_cache|mempool|dma_pool)_destroy)$expr/) {
5216 my $func = $1;
5217 if (WARN('NEEDLESS_IF',
5218 "$func(NULL) is safe and this check is probably not required\n" . $hereprev) &&
5219 $fix) {
5220 my $do_fix = 1;
5221 my $leading_tabs = "";
5222 my $new_leading_tabs = "";
5223 if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) {
5224 $leading_tabs = $1;
5225 } else {
5226 $do_fix = 0;
5227 }
5228 if ($lines[$linenr - 1] =~ /^\+(\t+)$func\s*\(\s*$tested\s*\)\s*;\s*$/) {
5229 $new_leading_tabs = $1;
5230 if (length($leading_tabs) + 1 ne length($new_leading_tabs)) {
5231 $do_fix = 0;
5232 }
5233 } else {
5234 $do_fix = 0;
5235 }
5236 if ($do_fix) {
5237 fix_delete_line($fixlinenr - 1, $prevrawline);
5238 $fixed[$fixlinenr] =~ s/^\+$new_leading_tabs/\+$leading_tabs/;
5239 }
5240 }
5241 }
5242 }
5243
5244# check for unnecessary "Out of Memory" messages
5245 if ($line =~ /^\+.*\b$logFunctions\s*\(/ &&
5246 $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ &&
5247 (defined $1 || defined $3) &&
5248 $linenr > 3) {
5249 my $testval = $2;
5250 my $testline = $lines[$linenr - 3];
5251
5252 my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0);
5253# print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n");
5254
5255 if ($c =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*(?:devm_)?(?:[kv][czm]alloc(?:_node|_array)?\b|kstrdup|(?:dev_)?alloc_skb)/) {
5256 WARN("OOM_MESSAGE",
5257 "Possible unnecessary 'out of memory' message\n" . $hereprev);
5258 }
5259 }
5260
5261# check for logging functions with KERN_<LEVEL>
5262 if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ &&
5263 $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) {
5264 my $level = $1;
5265 if (WARN("UNNECESSARY_KERN_LEVEL",
5266 "Possible unnecessary $level\n" . $herecurr) &&
5267 $fix) {
5268 $fixed[$fixlinenr] =~ s/\s*$level\s*//;
5269 }
5270 }
5271
5272# check for mask then right shift without a parentheses
5273 if ($^V && $^V ge 5.10.0 &&
5274 $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ &&
5275 $4 !~ /^\&/) { # $LvalOrFunc may be &foo, ignore if so
5276 WARN("MASK_THEN_SHIFT",
5277 "Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr);
5278 }
5279
5280# check for pointer comparisons to NULL
5281 if ($^V && $^V ge 5.10.0) {
5282 while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) {
5283 my $val = $1;
5284 my $equal = "!";
5285 $equal = "" if ($4 eq "!=");
5286 if (CHK("COMPARISON_TO_NULL",
5287 "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) &&
5288 $fix) {
5289 $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/;
5290 }
5291 }
5292 }
5293
5294# check for bad placement of section $InitAttribute (e.g.: __initdata)
5295 if ($line =~ /(\b$InitAttribute\b)/) {
5296 my $attr = $1;
5297 if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*[=;]/) {
5298 my $ptr = $1;
5299 my $var = $2;
5300 if ((($ptr =~ /\b(union|struct)\s+$attr\b/ &&
5301 ERROR("MISPLACED_INIT",
5302 "$attr should be placed after $var\n" . $herecurr)) ||
5303 ($ptr !~ /\b(union|struct)\s+$attr\b/ &&
5304 WARN("MISPLACED_INIT",
5305 "$attr should be placed after $var\n" . $herecurr))) &&
5306 $fix) {
5307 $fixed[$fixlinenr] =~ s/(\bstatic\s+(?:const\s+)?)(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*([=;])\s*/"$1" . trim(string_find_replace($2, "\\s*$attr\\s*", " ")) . " " . trim(string_find_replace($3, "\\s*$attr\\s*", "")) . " $attr" . ("$4" eq ";" ? ";" : " = ")/e;
5308 }
5309 }
5310 }
5311
5312# check for $InitAttributeData (ie: __initdata) with const
5313 if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) {
5314 my $attr = $1;
5315 $attr =~ /($InitAttributePrefix)(.*)/;
5316 my $attr_prefix = $1;
5317 my $attr_type = $2;
5318 if (ERROR("INIT_ATTRIBUTE",
5319 "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) &&
5320 $fix) {
5321 $fixed[$fixlinenr] =~
5322 s/$InitAttributeData/${attr_prefix}initconst/;
5323 }
5324 }
5325
5326# check for $InitAttributeConst (ie: __initconst) without const
5327 if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) {
5328 my $attr = $1;
5329 if (ERROR("INIT_ATTRIBUTE",
5330 "Use of $attr requires a separate use of const\n" . $herecurr) &&
5331 $fix) {
5332 my $lead = $fixed[$fixlinenr] =~
5333 /(^\+\s*(?:static\s+))/;
5334 $lead = rtrim($1);
5335 $lead = "$lead " if ($lead !~ /^\+$/);
5336 $lead = "${lead}const ";
5337 $fixed[$fixlinenr] =~ s/(^\+\s*(?:static\s+))/$lead/;
5338 }
5339 }
5340
5341# check for __read_mostly with const non-pointer (should just be const)
5342 if ($line =~ /\b__read_mostly\b/ &&
5343 $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) {
5344 if (ERROR("CONST_READ_MOSTLY",
5345 "Invalid use of __read_mostly with const type\n" . $herecurr) &&
5346 $fix) {
5347 $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//;
5348 }
5349 }
5350
5351# don't use __constant_<foo> functions outside of include/uapi/
5352 if ($realfile !~ m@^include/uapi/@ &&
5353 $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) {
5354 my $constant_func = $1;
5355 my $func = $constant_func;
5356 $func =~ s/^__constant_//;
5357 if (WARN("CONSTANT_CONVERSION",
5358 "$constant_func should be $func\n" . $herecurr) &&
5359 $fix) {
5360 $fixed[$fixlinenr] =~ s/\b$constant_func\b/$func/g;
5361 }
5362 }
5363
5364# prefer usleep_range over udelay
5365 if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) {
5366 my $delay = $1;
5367 # ignore udelay's < 10, however
5368 if (! ($delay < 10) ) {
5369 CHK("USLEEP_RANGE",
5370 "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.txt\n" . $herecurr);
5371 }
5372 if ($delay > 2000) {
5373 WARN("LONG_UDELAY",
5374 "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . $herecurr);
5375 }
5376 }
5377
5378# warn about unexpectedly long msleep's
5379 if ($line =~ /\bmsleep\s*\((\d+)\);/) {
5380 if ($1 < 20) {
5381 WARN("MSLEEP",
5382 "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt\n" . $herecurr);
5383 }
5384 }
5385
5386# check for comparisons of jiffies
5387 if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) {
5388 WARN("JIFFIES_COMPARISON",
5389 "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr);
5390 }
5391
5392# check for comparisons of get_jiffies_64()
5393 if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) {
5394 WARN("JIFFIES_COMPARISON",
5395 "Comparing get_jiffies_64() is almost always wrong; prefer time_after64, time_before64 and friends\n" . $herecurr);
5396 }
5397
5398# warn about #ifdefs in C files
5399# if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {
5400# print "#ifdef in C files should be avoided\n";
5401# print "$herecurr";
5402# $clean = 0;
5403# }
5404
5405# warn about spacing in #ifdefs
5406 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) {
5407 if (ERROR("SPACING",
5408 "exactly one space required after that #$1\n" . $herecurr) &&
5409 $fix) {
5410 $fixed[$fixlinenr] =~
5411 s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /;
5412 }
5413
5414 }
5415
5416# check for spinlock_t definitions without a comment.
5417 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ ||
5418 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) {
5419 my $which = $1;
5420 if (!ctx_has_comment($first_line, $linenr)) {
5421 CHK("UNCOMMENTED_DEFINITION",
5422 "$1 definition without comment\n" . $herecurr);
5423 }
5424 }
5425# check for memory barriers without a comment.
5426
5427 my $barriers = qr{
5428 mb|
5429 rmb|
5430 wmb|
5431 read_barrier_depends
5432 }x;
5433 my $barrier_stems = qr{
5434 mb__before_atomic|
5435 mb__after_atomic|
5436 store_release|
5437 load_acquire|
5438 store_mb|
5439 (?:$barriers)
5440 }x;
5441 my $all_barriers = qr{
5442 (?:$barriers)|
5443 smp_(?:$barrier_stems)|
5444 virt_(?:$barrier_stems)
5445 }x;
5446
5447 if ($line =~ /\b(?:$all_barriers)\s*\(/) {
5448 if (!ctx_has_comment($first_line, $linenr)) {
5449 WARN("MEMORY_BARRIER",
5450 "memory barrier without comment\n" . $herecurr);
5451 }
5452 }
5453
5454 my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;
5455
5456 if ($realfile !~ m@^include/asm-generic/@ &&
5457 $realfile !~ m@/barrier\.h$@ &&
5458 $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
5459 $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) {
5460 WARN("MEMORY_BARRIER",
5461 "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
5462 }
5463
5464# check for waitqueue_active without a comment.
5465 if ($line =~ /\bwaitqueue_active\s*\(/) {
5466 if (!ctx_has_comment($first_line, $linenr)) {
5467 WARN("WAITQUEUE_ACTIVE",
5468 "waitqueue_active without comment\n" . $herecurr);
5469 }
5470 }
5471
5472# Check for expedited grace periods that interrupt non-idle non-nohz
5473# online CPUs. These expedited can therefore degrade real-time response
5474# if used carelessly, and should be avoided where not absolutely
5475# needed. It is always OK to use synchronize_rcu_expedited() and
5476# synchronize_sched_expedited() at boot time (before real-time applications
5477# start) and in error situations where real-time response is compromised in
5478# any case. Note that synchronize_srcu_expedited() does -not- interrupt
5479# other CPUs, so don't warn on uses of synchronize_srcu_expedited().
5480# Of course, nothing comes for free, and srcu_read_lock() and
5481# srcu_read_unlock() do contain full memory barriers in payment for
5482# synchronize_srcu_expedited() non-interruption properties.
5483 if ($line =~ /\b(synchronize_rcu_expedited|synchronize_sched_expedited)\(/) {
5484 WARN("EXPEDITED_RCU_GRACE_PERIOD",
5485 "expedited RCU grace periods should be avoided where they can degrade real-time response\n" . $herecurr);
5486
5487 }
5488
5489# check of hardware specific defines
5490 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) {
5491 CHK("ARCH_DEFINES",
5492 "architecture specific defines should be avoided\n" . $herecurr);
5493 }
5494
5495# Check that the storage class is at the beginning of a declaration
5496 if ($line =~ /\b$Storage\b/ && $line !~ /^.\s*$Storage\b/) {
5497 WARN("STORAGE_CLASS",
5498 "storage class should be at the beginning of the declaration\n" . $herecurr)
5499 }
5500
5501# check the location of the inline attribute, that it is between
5502# storage class and type.
5503 if ($line =~ /\b$Type\s+$Inline\b/ ||
5504 $line =~ /\b$Inline\s+$Storage\b/) {
5505 ERROR("INLINE_LOCATION",
5506 "inline keyword should sit between storage class and type\n" . $herecurr);
5507 }
5508
5509# Check for __inline__ and __inline, prefer inline
5510 if ($realfile !~ m@\binclude/uapi/@ &&
5511 $line =~ /\b(__inline__|__inline)\b/) {
5512 if (WARN("INLINE",
5513 "plain inline is preferred over $1\n" . $herecurr) &&
5514 $fix) {
5515 $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/;
5516
5517 }
5518 }
5519
5520# Check for __attribute__ packed, prefer __packed
5521 if ($realfile !~ m@\binclude/uapi/@ &&
5522 $line =~ /\b__attribute__\s*\(\s*\(.*\bpacked\b/) {
5523 WARN("PREFER_PACKED",
5524 "__packed is preferred over __attribute__((packed))\n" . $herecurr);
5525 }
5526
5527# Check for __attribute__ aligned, prefer __aligned
5528 if ($realfile !~ m@\binclude/uapi/@ &&
5529 $line =~ /\b__attribute__\s*\(\s*\(.*aligned/) {
5530 WARN("PREFER_ALIGNED",
5531 "__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr);
5532 }
5533
5534# Check for __attribute__ format(printf, prefer __printf
5535 if ($realfile !~ m@\binclude/uapi/@ &&
5536 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) {
5537 if (WARN("PREFER_PRINTF",
5538 "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr) &&
5539 $fix) {
5540 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.*)\)\s*\)\s*\)/"__printf(" . trim($1) . ")"/ex;
5541
5542 }
5543 }
5544
5545# Check for __attribute__ format(scanf, prefer __scanf
5546 if ($realfile !~ m@\binclude/uapi/@ &&
5547 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) {
5548 if (WARN("PREFER_SCANF",
5549 "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr) &&
5550 $fix) {
5551 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\s*,\s*(.*)\)\s*\)\s*\)/"__scanf(" . trim($1) . ")"/ex;
5552 }
5553 }
5554
5555# Check for __attribute__ weak, or __weak declarations (may have link issues)
5556 if ($^V && $^V ge 5.10.0 &&
5557 $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ &&
5558 ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ ||
5559 $line =~ /\b__weak\b/)) {
5560 ERROR("WEAK_DECLARATION",
5561 "Using weak declarations can have unintended link defects\n" . $herecurr);
5562 }
5563
5564# check for c99 types like uint8_t used outside of uapi/ and tools/
5565 if ($realfile !~ m@\binclude/uapi/@ &&
5566 $realfile !~ m@\btools/@ &&
5567 $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) {
5568 my $type = $1;
5569 if ($type =~ /\b($typeC99Typedefs)\b/) {
5570 $type = $1;
5571 my $kernel_type = 'u';
5572 $kernel_type = 's' if ($type =~ /^_*[si]/);
5573 $type =~ /(\d+)/;
5574 $kernel_type .= $1;
5575 if (CHK("PREFER_KERNEL_TYPES",
5576 "Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) &&
5577 $fix) {
5578 $fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/;
5579 }
5580 }
5581 }
5582
5583# check for cast of C90 native int or longer types constants
5584 if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) {
5585 my $cast = $1;
5586 my $const = $2;
5587 if (WARN("TYPECAST_INT_CONSTANT",
5588 "Unnecessary typecast of c90 int constant\n" . $herecurr) &&
5589 $fix) {
5590 my $suffix = "";
5591 my $newconst = $const;
5592 $newconst =~ s/${Int_type}$//;
5593 $suffix .= 'U' if ($cast =~ /\bunsigned\b/);
5594 if ($cast =~ /\blong\s+long\b/) {
5595 $suffix .= 'LL';
5596 } elsif ($cast =~ /\blong\b/) {
5597 $suffix .= 'L';
5598 }
5599 $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/;
5600 }
5601 }
5602
5603# check for sizeof(&)
5604 if ($line =~ /\bsizeof\s*\(\s*\&/) {
5605 WARN("SIZEOF_ADDRESS",
5606 "sizeof(& should be avoided\n" . $herecurr);
5607 }
5608
5609# check for sizeof without parenthesis
5610 if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) {
5611 if (WARN("SIZEOF_PARENTHESIS",
5612 "sizeof $1 should be sizeof($1)\n" . $herecurr) &&
5613 $fix) {
5614 $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex;
5615 }
5616 }
5617
5618# check for struct spinlock declarations
5619 if ($line =~ /^.\s*\bstruct\s+spinlock\s+\w+\s*;/) {
5620 WARN("USE_SPINLOCK_T",
5621 "struct spinlock should be spinlock_t\n" . $herecurr);
5622 }
5623
5624# check for seq_printf uses that could be seq_puts
5625 if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) {
5626 my $fmt = get_quoted_string($line, $rawline);
5627 $fmt =~ s/%%//g;
5628 if ($fmt !~ /%/) {
5629 if (WARN("PREFER_SEQ_PUTS",
5630 "Prefer seq_puts to seq_printf\n" . $herecurr) &&
5631 $fix) {
5632 $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/;
5633 }
5634 }
5635 }
5636
5637# Check for misused memsets
5638 if ($^V && $^V ge 5.10.0 &&
5639 defined $stat &&
5640 $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/) {
5641
5642 my $ms_addr = $2;
5643 my $ms_val = $7;
5644 my $ms_size = $12;
5645
5646 if ($ms_size =~ /^(0x|)0$/i) {
5647 ERROR("MEMSET",
5648 "memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n");
5649 } elsif ($ms_size =~ /^(0x|)1$/i) {
5650 WARN("MEMSET",
5651 "single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n");
5652 }
5653 }
5654
5655# Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar)
5656# if ($^V && $^V ge 5.10.0 &&
5657# defined $stat &&
5658# $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
5659# if (WARN("PREFER_ETHER_ADDR_COPY",
5660# "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") &&
5661# $fix) {
5662# $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/;
5663# }
5664# }
5665
5666# Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar)
5667# if ($^V && $^V ge 5.10.0 &&
5668# defined $stat &&
5669# $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
5670# WARN("PREFER_ETHER_ADDR_EQUAL",
5671# "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n")
5672# }
5673
5674# check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr
5675# check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr
5676# if ($^V && $^V ge 5.10.0 &&
5677# defined $stat &&
5678# $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) {
5679#
5680# my $ms_val = $7;
5681#
5682# if ($ms_val =~ /^(?:0x|)0+$/i) {
5683# if (WARN("PREFER_ETH_ZERO_ADDR",
5684# "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") &&
5685# $fix) {
5686# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/;
5687# }
5688# } elsif ($ms_val =~ /^(?:0xff|255)$/i) {
5689# if (WARN("PREFER_ETH_BROADCAST_ADDR",
5690# "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") &&
5691# $fix) {
5692# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/;
5693# }
5694# }
5695# }
5696
5697# typecasts on min/max could be min_t/max_t
5698 if ($^V && $^V ge 5.10.0 &&
5699 defined $stat &&
5700 $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) {
5701 if (defined $2 || defined $7) {
5702 my $call = $1;
5703 my $cast1 = deparenthesize($2);
5704 my $arg1 = $3;
5705 my $cast2 = deparenthesize($7);
5706 my $arg2 = $8;
5707 my $cast;
5708
5709 if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) {
5710 $cast = "$cast1 or $cast2";
5711 } elsif ($cast1 ne "") {
5712 $cast = $cast1;
5713 } else {
5714 $cast = $cast2;
5715 }
5716 WARN("MINMAX",
5717 "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n");
5718 }
5719 }
5720
5721# check usleep_range arguments
5722 if ($^V && $^V ge 5.10.0 &&
5723 defined $stat &&
5724 $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) {
5725 my $min = $1;
5726 my $max = $7;
5727 if ($min eq $max) {
5728 WARN("USLEEP_RANGE",
5729 "usleep_range should not use min == max args; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n");
5730 } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ &&
5731 $min > $max) {
5732 WARN("USLEEP_RANGE",
5733 "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n");
5734 }
5735 }
5736
5737# check for naked sscanf
5738 if ($^V && $^V ge 5.10.0 &&
5739 defined $stat &&
5740 $line =~ /\bsscanf\b/ &&
5741 ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ &&
5742 $stat !~ /\bsscanf\s*$balanced_parens\s*(?:$Compare)/ &&
5743 $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) {
5744 my $lc = $stat =~ tr@\n@@;
5745 $lc = $lc + $linenr;
5746 my $stat_real = raw_line($linenr, 0);
5747 for (my $count = $linenr + 1; $count <= $lc; $count++) {
5748 $stat_real = $stat_real . "\n" . raw_line($count, 0);
5749 }
5750 WARN("NAKED_SSCANF",
5751 "unchecked sscanf return value\n" . "$here\n$stat_real\n");
5752 }
5753
5754# check for simple sscanf that should be kstrto<foo>
5755 if ($^V && $^V ge 5.10.0 &&
5756 defined $stat &&
5757 $line =~ /\bsscanf\b/) {
5758 my $lc = $stat =~ tr@\n@@;
5759 $lc = $lc + $linenr;
5760 my $stat_real = raw_line($linenr, 0);
5761 for (my $count = $linenr + 1; $count <= $lc; $count++) {
5762 $stat_real = $stat_real . "\n" . raw_line($count, 0);
5763 }
5764 if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) {
5765 my $format = $6;
5766 my $count = $format =~ tr@%@%@;
5767 if ($count == 1 &&
5768 $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) {
5769 WARN("SSCANF_TO_KSTRTO",
5770 "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n");
5771 }
5772 }
5773 }
5774
5775# check for new externs in .h files.
5776 if ($realfile =~ /\.h$/ &&
5777 $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) {
5778 if (CHK("AVOID_EXTERNS",
5779 "extern prototypes should be avoided in .h files\n" . $herecurr) &&
5780 $fix) {
5781 $fixed[$fixlinenr] =~ s/(.*)\bextern\b\s*(.*)/$1$2/;
5782 }
5783 }
5784
5785# check for new externs in .c files.
5786 if ($realfile =~ /\.c$/ && defined $stat &&
5787 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s)
5788 {
5789 my $function_name = $1;
5790 my $paren_space = $2;
5791
5792 my $s = $stat;
5793 if (defined $cond) {
5794 substr($s, 0, length($cond), '');
5795 }
5796 if ($s =~ /^\s*;/ &&
5797 $function_name ne 'uninitialized_var')
5798 {
5799 WARN("AVOID_EXTERNS",
5800 "externs should be avoided in .c files\n" . $herecurr);
5801 }
5802
5803 if ($paren_space =~ /\n/) {
5804 WARN("FUNCTION_ARGUMENTS",
5805 "arguments for function declarations should follow identifier\n" . $herecurr);
5806 }
5807
5808 } elsif ($realfile =~ /\.c$/ && defined $stat &&
5809 $stat =~ /^.\s*extern\s+/)
5810 {
5811 WARN("AVOID_EXTERNS",
5812 "externs should be avoided in .c files\n" . $herecurr);
5813 }
5814
5815 if ($realfile =~ /\.[ch]$/ && defined $stat &&
5816 $stat =~ /^.\s*(?:extern\s+)?$Type\s*$Ident\s*\(\s*([^{]+)\s*\)\s*;/s &&
5817 $1 ne "void") {
5818 my $args = trim($1);
5819 while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
5820 my $arg = trim($1);
5821 if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
5822 WARN("FUNCTION_ARGUMENTS",
5823 "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
5824 }
5825 }
5826 }
5827
5828# checks for new __setup's
5829 if ($rawline =~ /\b__setup\("([^"]*)"/) {
5830 my $name = $1;
5831
5832 if (!grep(/$name/, @setup_docs)) {
5833 CHK("UNDOCUMENTED_SETUP",
5834 "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.rst\n" . $herecurr);
5835 }
5836 }
5837
5838# check for pointless casting of kmalloc return
5839 if ($line =~ /\*\s*\)\s*[kv][czm]alloc(_node){0,1}\b/) {
5840 WARN("UNNECESSARY_CASTS",
5841 "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
5842 }
5843
5844# alloc style
5845# p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...)
5846 if ($^V && $^V ge 5.10.0 &&
5847 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*([kv][mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) {
5848 CHK("ALLOC_SIZEOF_STRUCT",
5849 "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr);
5850 }
5851
5852# check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc
5853 if ($^V && $^V ge 5.10.0 &&
5854 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
5855 my $oldfunc = $3;
5856 my $a1 = $4;
5857 my $a2 = $10;
5858 my $newfunc = "kmalloc_array";
5859 $newfunc = "kcalloc" if ($oldfunc eq "kzalloc");
5860 my $r1 = $a1;
5861 my $r2 = $a2;
5862 if ($a1 =~ /^sizeof\s*\S/) {
5863 $r1 = $a2;
5864 $r2 = $a1;
5865 }
5866 if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
5867 !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) {
5868 if (WARN("ALLOC_WITH_MULTIPLY",
5869 "Prefer $newfunc over $oldfunc with multiply\n" . $herecurr) &&
5870 $fix) {
5871 $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
5872
5873 }
5874 }
5875 }
5876
5877# check for krealloc arg reuse
5878 if ($^V && $^V ge 5.10.0 &&
5879 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*\1\s*,/) {
5880 WARN("KREALLOC_ARG_REUSE",
5881 "Reusing the krealloc arg is almost always a bug\n" . $herecurr);
5882 }
5883
5884# check for alloc argument mismatch
5885 if ($line =~ /\b(kcalloc|kmalloc_array)\s*\(\s*sizeof\b/) {
5886 WARN("ALLOC_ARRAY_ARGS",
5887 "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
5888 }
5889
5890# check for multiple semicolons
5891 if ($line =~ /;\s*;\s*$/) {
5892 if (WARN("ONE_SEMICOLON",
5893 "Statements terminations use 1 semicolon\n" . $herecurr) &&
5894 $fix) {
5895 $fixed[$fixlinenr] =~ s/(\s*;\s*){2,}$/;/g;
5896 }
5897 }
5898
5899# check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi
5900 if ($realfile !~ m@^include/uapi/@ &&
5901 $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) {
5902 my $ull = "";
5903 $ull = "_ULL" if (defined($1) && $1 =~ /ll/i);
5904 if (CHK("BIT_MACRO",
5905 "Prefer using the BIT$ull macro\n" . $herecurr) &&
5906 $fix) {
5907 $fixed[$fixlinenr] =~ s/\(?\s*1\s*[ulUL]*\s*<<\s*(\d+|$Ident)\s*\)?/BIT${ull}($1)/;
5908 }
5909 }
5910
5911# check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE
5912 if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(CONFIG_[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) {
5913 my $config = $1;
5914 if (WARN("PREFER_IS_ENABLED",
5915 "Prefer IS_ENABLED(<FOO>) to CONFIG_<FOO> || CONFIG_<FOO>_MODULE\n" . $herecurr) &&
5916 $fix) {
5917 $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)";
5918 }
5919 }
5920
5921# check for case / default statements not preceded by break/fallthrough/switch
5922 if ($line =~ /^.\s*(?:case\s+(?:$Ident|$Constant)\s*|default):/) {
5923 my $has_break = 0;
5924 my $has_statement = 0;
5925 my $count = 0;
5926 my $prevline = $linenr;
5927 while ($prevline > 1 && ($file || $count < 3) && !$has_break) {
5928 $prevline--;
5929 my $rline = $rawlines[$prevline - 1];
5930 my $fline = $lines[$prevline - 1];
5931 last if ($fline =~ /^\@\@/);
5932 next if ($fline =~ /^\-/);
5933 next if ($fline =~ /^.(?:\s*(?:case\s+(?:$Ident|$Constant)[\s$;]*|default):[\s$;]*)*$/);
5934 $has_break = 1 if ($rline =~ /fall[\s_-]*(through|thru)/i);
5935 next if ($fline =~ /^.[\s$;]*$/);
5936 $has_statement = 1;
5937 $count++;
5938 $has_break = 1 if ($fline =~ /\bswitch\b|\b(?:break\s*;[\s$;]*$|return\b|goto\b|continue\b)/);
5939 }
5940 if (!$has_break && $has_statement) {
5941 WARN("MISSING_BREAK",
5942 "Possible switch case/default not preceded by break or fallthrough comment\n" . $herecurr);
5943 }
5944 }
5945
5946# check for switch/default statements without a break;
5947 if ($^V && $^V ge 5.10.0 &&
5948 defined $stat &&
5949 $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) {
5950 my $ctx = '';
5951 my $herectx = $here . "\n";
5952 my $cnt = statement_rawlines($stat);
5953 for (my $n = 0; $n < $cnt; $n++) {
5954 $herectx .= raw_line($linenr, $n) . "\n";
5955 }
5956 WARN("DEFAULT_NO_BREAK",
5957 "switch default: should use break\n" . $herectx);
5958 }
5959
5960# check for gcc specific __FUNCTION__
5961 if ($line =~ /\b__FUNCTION__\b/) {
5962 if (WARN("USE_FUNC",
5963 "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr) &&
5964 $fix) {
5965 $fixed[$fixlinenr] =~ s/\b__FUNCTION__\b/__func__/g;
5966 }
5967 }
5968
5969# check for uses of __DATE__, __TIME__, __TIMESTAMP__
5970 while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) {
5971 ERROR("DATE_TIME",
5972 "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr);
5973 }
5974
5975# check for use of yield()
5976 if ($line =~ /\byield\s*\(\s*\)/) {
5977 WARN("YIELD",
5978 "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr);
5979 }
5980
5981# check for comparisons against true and false
5982 if ($line =~ /\+\s*(.*?)\b(true|false|$Lval)\s*(==|\!=)\s*(true|false|$Lval)\b(.*)$/i) {
5983 my $lead = $1;
5984 my $arg = $2;
5985 my $test = $3;
5986 my $otype = $4;
5987 my $trail = $5;
5988 my $op = "!";
5989
5990 ($arg, $otype) = ($otype, $arg) if ($arg =~ /^(?:true|false)$/i);
5991
5992 my $type = lc($otype);
5993 if ($type =~ /^(?:true|false)$/) {
5994 if (("$test" eq "==" && "$type" eq "true") ||
5995 ("$test" eq "!=" && "$type" eq "false")) {
5996 $op = "";
5997 }
5998
5999 CHK("BOOL_COMPARISON",
6000 "Using comparison to $otype is error prone\n" . $herecurr);
6001
6002## maybe suggesting a correct construct would better
6003## "Using comparison to $otype is error prone. Perhaps use '${lead}${op}${arg}${trail}'\n" . $herecurr);
6004
6005 }
6006 }
6007
6008# check for semaphores initialized locked
6009 if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) {
6010 WARN("CONSIDER_COMPLETION",
6011 "consider using a completion\n" . $herecurr);
6012 }
6013
6014# recommend kstrto* over simple_strto* and strict_strto*
6015 if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) {
6016 WARN("CONSIDER_KSTRTO",
6017 "$1 is obsolete, use k$3 instead\n" . $herecurr);
6018 }
6019
6020# check for __initcall(), use device_initcall() explicitly or more appropriate function please
6021 if ($line =~ /^.\s*__initcall\s*\(/) {
6022 WARN("USE_DEVICE_INITCALL",
6023 "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr);
6024 }
6025
6026# check for various structs that are normally const (ops, kgdb, device_tree)
6027 if ($line !~ /\bconst\b/ &&
6028 $line =~ /\bstruct\s+($const_structs)\b/) {
6029 WARN("CONST_STRUCT",
6030 "struct $1 should normally be const\n" .
6031 $herecurr);
6032 }
6033
6034# use of NR_CPUS is usually wrong
6035# ignore definitions of NR_CPUS and usage to define arrays as likely right
6036 if ($line =~ /\bNR_CPUS\b/ &&
6037 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ &&
6038 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ &&
6039 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ &&
6040 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ &&
6041 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/)
6042 {
6043 WARN("NR_CPUS",
6044 "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr);
6045 }
6046
6047# Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong.
6048 if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) {
6049 ERROR("DEFINE_ARCH_HAS",
6050 "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr);
6051 }
6052
6053# likely/unlikely comparisons similar to "(likely(foo) > 0)"
6054 if ($^V && $^V ge 5.10.0 &&
6055 $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) {
6056 WARN("LIKELY_MISUSE",
6057 "Using $1 should generally have parentheses around the comparison\n" . $herecurr);
6058 }
6059
6060# whine mightly about in_atomic
6061 if ($line =~ /\bin_atomic\s*\(/) {
6062 if ($realfile =~ m@^drivers/@) {
6063 ERROR("IN_ATOMIC",
6064 "do not use in_atomic in drivers\n" . $herecurr);
6065 } elsif ($realfile !~ m@^kernel/@) {
6066 WARN("IN_ATOMIC",
6067 "use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
6068 }
6069 }
6070
6071# whine about ACCESS_ONCE
6072 if ($^V && $^V ge 5.10.0 &&
6073 $line =~ /\bACCESS_ONCE\s*$balanced_parens\s*(=(?!=))?\s*($FuncArg)?/) {
6074 my $par = $1;
6075 my $eq = $2;
6076 my $fun = $3;
6077 $par =~ s/^\(\s*(.*)\s*\)$/$1/;
6078 if (defined($eq)) {
6079 if (WARN("PREFER_WRITE_ONCE",
6080 "Prefer WRITE_ONCE(<FOO>, <BAR>) over ACCESS_ONCE(<FOO>) = <BAR>\n" . $herecurr) &&
6081 $fix) {
6082 $fixed[$fixlinenr] =~ s/\bACCESS_ONCE\s*\(\s*\Q$par\E\s*\)\s*$eq\s*\Q$fun\E/WRITE_ONCE($par, $fun)/;
6083 }
6084 } else {
6085 if (WARN("PREFER_READ_ONCE",
6086 "Prefer READ_ONCE(<FOO>) over ACCESS_ONCE(<FOO>)\n" . $herecurr) &&
6087 $fix) {
6088 $fixed[$fixlinenr] =~ s/\bACCESS_ONCE\s*\(\s*\Q$par\E\s*\)/READ_ONCE($par)/;
6089 }
6090 }
6091 }
6092
6093# check for mutex_trylock_recursive usage
6094 if ($line =~ /mutex_trylock_recursive/) {
6095 ERROR("LOCKING",
6096 "recursive locking is bad, do not use this ever.\n" . $herecurr);
6097 }
6098
6099# check for lockdep_set_novalidate_class
6100 if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ ||
6101 $line =~ /__lockdep_no_validate__\s*\)/ ) {
6102 if ($realfile !~ m@^kernel/lockdep@ &&
6103 $realfile !~ m@^include/linux/lockdep@ &&
6104 $realfile !~ m@^drivers/base/core@) {
6105 ERROR("LOCKDEP",
6106 "lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr);
6107 }
6108 }
6109
6110 if ($line =~ /debugfs_create_\w+.*\b$mode_perms_world_writable\b/ ||
6111 $line =~ /DEVICE_ATTR.*\b$mode_perms_world_writable\b/) {
6112 WARN("EXPORTED_WORLD_WRITABLE",
6113 "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr);
6114 }
6115
6116# Mode permission misuses where it seems decimal should be octal
6117# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop
6118 if ($^V && $^V ge 5.10.0 &&
6119 defined $stat &&
6120 $line =~ /$mode_perms_search/) {
6121 foreach my $entry (@mode_permission_funcs) {
6122 my $func = $entry->[0];
6123 my $arg_pos = $entry->[1];
6124
6125 my $lc = $stat =~ tr@\n@@;
6126 $lc = $lc + $linenr;
6127 my $stat_real = raw_line($linenr, 0);
6128 for (my $count = $linenr + 1; $count <= $lc; $count++) {
6129 $stat_real = $stat_real . "\n" . raw_line($count, 0);
6130 }
6131
6132 my $skip_args = "";
6133 if ($arg_pos > 1) {
6134 $arg_pos--;
6135 $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}";
6136 }
6137 my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]";
6138 if ($stat =~ /$test/) {
6139 my $val = $1;
6140 $val = $6 if ($skip_args ne "");
6141 if (($val =~ /^$Int$/ && $val !~ /^$Octal$/) ||
6142 ($val =~ /^$Octal$/ && length($val) ne 4)) {
6143 ERROR("NON_OCTAL_PERMISSIONS",
6144 "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real);
6145 }
6146 if ($val =~ /^$Octal$/ && (oct($val) & 02)) {
6147 ERROR("EXPORTED_WORLD_WRITABLE",
6148 "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real);
6149 }
6150 }
6151 }
6152 }
6153
6154# check for uses of S_<PERMS> that could be octal for readability
6155 if ($line =~ /\b$mode_perms_string_search\b/) {
6156 my $val = "";
6157 my $oval = "";
6158 my $to = 0;
6159 my $curpos = 0;
6160 my $lastpos = 0;
6161 while ($line =~ /\b(($mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) {
6162 $curpos = pos($line);
6163 my $match = $2;
6164 my $omatch = $1;
6165 last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos));
6166 $lastpos = $curpos;
6167 $to |= $mode_permission_string_types{$match};
6168 $val .= '\s*\|\s*' if ($val ne "");
6169 $val .= $match;
6170 $oval .= $omatch;
6171 }
6172 $oval =~ s/^\s*\|\s*//;
6173 $oval =~ s/\s*\|\s*$//;
6174 my $octal = sprintf("%04o", $to);
6175 if (WARN("SYMBOLIC_PERMS",
6176 "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) &&
6177 $fix) {
6178 $fixed[$fixlinenr] =~ s/$val/$octal/;
6179 }
6180 }
6181
6182# validate content of MODULE_LICENSE against list from include/linux/module.h
6183 if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) {
6184 my $extracted_string = get_quoted_string($line, $rawline);
6185 my $valid_licenses = qr{
6186 GPL|
6187 GPL\ v2|
6188 GPL\ and\ additional\ rights|
6189 Dual\ BSD/GPL|
6190 Dual\ MIT/GPL|
6191 Dual\ MPL/GPL|
6192 Proprietary
6193 }x;
6194 if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) {
6195 WARN("MODULE_LICENSE",
6196 "unknown module license " . $extracted_string . "\n" . $herecurr);
6197 }
6198 }
6199 }
6200
6201 # If we have no input at all, then there is nothing to report on
6202 # so just keep quiet.
6203 if ($#rawlines == -1) {
6204 exit(0);
6205 }
6206
6207 # In mailback mode only produce a report in the negative, for
6208 # things that appear to be patches.
6209 if ($mailback && ($clean == 1 || !$is_patch)) {
6210 exit(0);
6211 }
6212
6213 # This is not a patch, and we are are in 'no-patch' mode so
6214 # just keep quiet.
6215 if (!$chk_patch && !$is_patch) {
6216 exit(0);
6217 }
6218
6219 if (!$is_patch && $file !~ /cover-letter\.patch$/) {
6220 ERROR("NOT_UNIFIED_DIFF",
6221 "Does not appear to be a unified-diff format patch\n");
6222 }
6223 if ($is_patch && $has_commit_log && $chk_signoff && $signoff == 0) {
6224 ERROR("MISSING_SIGN_OFF",
6225 "Missing Signed-off-by: line(s)\n");
6226 }
6227
6228 print report_dump();
6229 if ($summary && !($clean == 1 && $quiet == 1)) {
6230 print "$filename " if ($summary_file);
6231 print "total: $cnt_error errors, $cnt_warn warnings, " .
6232 (($check)? "$cnt_chk checks, " : "") .
6233 "$cnt_lines lines checked\n";
6234 }
6235
6236 if ($quiet == 0) {
6237 # If there were any defects found and not already fixing them
6238 if (!$clean and !$fix) {
6239 print << "EOM"
6240
6241NOTE: For some of the reported defects, checkpatch may be able to
6242 mechanically convert to the typical style using --fix or --fix-inplace.
6243EOM
6244 }
6245 # If there were whitespace errors which cleanpatch can fix
6246 # then suggest that.
6247 if ($rpt_cleaners) {
6248 $rpt_cleaners = 0;
6249 print << "EOM"
6250
6251NOTE: Whitespace errors detected.
6252 You may wish to use scripts/cleanpatch or scripts/cleanfile
6253EOM
6254 }
6255 }
6256
6257 if ($clean == 0 && $fix &&
6258 ("@rawlines" ne "@fixed" ||
6259 $#fixed_inserted >= 0 || $#fixed_deleted >= 0)) {
6260 my $newfile = $filename;
6261 $newfile .= ".EXPERIMENTAL-checkpatch-fixes" if (!$fix_inplace);
6262 my $linecount = 0;
6263 my $f;
6264
6265 @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted);
6266
6267 open($f, '>', $newfile)
6268 or die "$P: Can't open $newfile for write\n";
6269 foreach my $fixed_line (@fixed) {
6270 $linecount++;
6271 if ($file) {
6272 if ($linecount > 3) {
6273 $fixed_line =~ s/^\+//;
6274 print $f $fixed_line . "\n";
6275 }
6276 } else {
6277 print $f $fixed_line . "\n";
6278 }
6279 }
6280 close($f);
6281
6282 if (!$quiet) {
6283 print << "EOM";
6284
6285Wrote EXPERIMENTAL --fix correction(s) to '$newfile'
6286
6287Do _NOT_ trust the results written to this file.
6288Do _NOT_ submit these changes without inspecting them for correctness.
6289
6290This EXPERIMENTAL file is simply a convenience to help rewrite patches.
6291No warranties, expressed or implied...
6292EOM
6293 }
6294 }
6295
6296 if ($quiet == 0) {
6297 print "\n";
6298 if ($clean == 1) {
6299 print "$vname has no obvious style problems and is ready for submission.\n";
6300 } else {
6301 print "$vname has style problems, please review.\n";
6302 }
6303 }
6304 return $clean;
6305}