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1/* SPDX-License-Identifier: GPL-2.0 */
2#undef TRACE_SYSTEM
3#define TRACE_SYSTEM rcu
4
5#if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
6#define _TRACE_RCU_H
7
8#include <linux/tracepoint.h>
9
10#ifdef CONFIG_RCU_TRACE
11#define TRACE_EVENT_RCU TRACE_EVENT
12#else
13#define TRACE_EVENT_RCU TRACE_EVENT_NOP
14#endif
15
16/*
17 * Tracepoint for start/end markers used for utilization calculations.
18 * By convention, the string is of the following forms:
19 *
20 * "Start <activity>" -- Mark the start of the specified activity,
21 * such as "context switch". Nesting is permitted.
22 * "End <activity>" -- Mark the end of the specified activity.
23 *
24 * An "@" character within "<activity>" is a comment character: Data
25 * reduction scripts will ignore the "@" and the remainder of the line.
26 */
27TRACE_EVENT(rcu_utilization,
28
29 TP_PROTO(const char *s),
30
31 TP_ARGS(s),
32
33 TP_STRUCT__entry(
34 __field(const char *, s)
35 ),
36
37 TP_fast_assign(
38 __entry->s = s;
39 ),
40
41 TP_printk("%s", __entry->s)
42);
43
44#if defined(CONFIG_TREE_RCU)
45
46/*
47 * Tracepoint for grace-period events. Takes a string identifying the
48 * RCU flavor, the grace-period number, and a string identifying the
49 * grace-period-related event as follows:
50 *
51 * "AccReadyCB": CPU acclerates new callbacks to RCU_NEXT_READY_TAIL.
52 * "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL.
53 * "newreq": Request a new grace period.
54 * "start": Start a grace period.
55 * "cpustart": CPU first notices a grace-period start.
56 * "cpuqs": CPU passes through a quiescent state.
57 * "cpuonl": CPU comes online.
58 * "cpuofl": CPU goes offline.
59 * "cpuofl-bgp": CPU goes offline while blocking a grace period.
60 * "reqwait": GP kthread sleeps waiting for grace-period request.
61 * "reqwaitsig": GP kthread awakened by signal from reqwait state.
62 * "fqswait": GP kthread waiting until time to force quiescent states.
63 * "fqsstart": GP kthread starts forcing quiescent states.
64 * "fqsend": GP kthread done forcing quiescent states.
65 * "fqswaitsig": GP kthread awakened by signal from fqswait state.
66 * "end": End a grace period.
67 * "cpuend": CPU first notices a grace-period end.
68 */
69TRACE_EVENT_RCU(rcu_grace_period,
70
71 TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent),
72
73 TP_ARGS(rcuname, gp_seq, gpevent),
74
75 TP_STRUCT__entry(
76 __field(const char *, rcuname)
77 __field(unsigned long, gp_seq)
78 __field(const char *, gpevent)
79 ),
80
81 TP_fast_assign(
82 __entry->rcuname = rcuname;
83 __entry->gp_seq = gp_seq;
84 __entry->gpevent = gpevent;
85 ),
86
87 TP_printk("%s %lu %s",
88 __entry->rcuname, __entry->gp_seq, __entry->gpevent)
89);
90
91/*
92 * Tracepoint for future grace-period events. The caller should pull
93 * the data from the rcu_node structure, other than rcuname, which comes
94 * from the rcu_state structure, and event, which is one of the following:
95 *
96 * "Cleanup": Clean up rcu_node structure after previous GP.
97 * "CleanupMore": Clean up, and another GP is needed.
98 * "EndWait": Complete wait.
99 * "NoGPkthread": The RCU grace-period kthread has not yet started.
100 * "Prestarted": Someone beat us to the request
101 * "Startedleaf": Leaf node marked for future GP.
102 * "Startedleafroot": All nodes from leaf to root marked for future GP.
103 * "Startedroot": Requested a nocb grace period based on root-node data.
104 * "Startleaf": Request a grace period based on leaf-node data.
105 * "StartWait": Start waiting for the requested grace period.
106 */
107TRACE_EVENT_RCU(rcu_future_grace_period,
108
109 TP_PROTO(const char *rcuname, unsigned long gp_seq,
110 unsigned long gp_seq_req, u8 level, int grplo, int grphi,
111 const char *gpevent),
112
113 TP_ARGS(rcuname, gp_seq, gp_seq_req, level, grplo, grphi, gpevent),
114
115 TP_STRUCT__entry(
116 __field(const char *, rcuname)
117 __field(unsigned long, gp_seq)
118 __field(unsigned long, gp_seq_req)
119 __field(u8, level)
120 __field(int, grplo)
121 __field(int, grphi)
122 __field(const char *, gpevent)
123 ),
124
125 TP_fast_assign(
126 __entry->rcuname = rcuname;
127 __entry->gp_seq = gp_seq;
128 __entry->gp_seq_req = gp_seq_req;
129 __entry->level = level;
130 __entry->grplo = grplo;
131 __entry->grphi = grphi;
132 __entry->gpevent = gpevent;
133 ),
134
135 TP_printk("%s %lu %lu %u %d %d %s",
136 __entry->rcuname, __entry->gp_seq, __entry->gp_seq_req, __entry->level,
137 __entry->grplo, __entry->grphi, __entry->gpevent)
138);
139
140/*
141 * Tracepoint for grace-period-initialization events. These are
142 * distinguished by the type of RCU, the new grace-period number, the
143 * rcu_node structure level, the starting and ending CPU covered by the
144 * rcu_node structure, and the mask of CPUs that will be waited for.
145 * All but the type of RCU are extracted from the rcu_node structure.
146 */
147TRACE_EVENT_RCU(rcu_grace_period_init,
148
149 TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level,
150 int grplo, int grphi, unsigned long qsmask),
151
152 TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask),
153
154 TP_STRUCT__entry(
155 __field(const char *, rcuname)
156 __field(unsigned long, gp_seq)
157 __field(u8, level)
158 __field(int, grplo)
159 __field(int, grphi)
160 __field(unsigned long, qsmask)
161 ),
162
163 TP_fast_assign(
164 __entry->rcuname = rcuname;
165 __entry->gp_seq = gp_seq;
166 __entry->level = level;
167 __entry->grplo = grplo;
168 __entry->grphi = grphi;
169 __entry->qsmask = qsmask;
170 ),
171
172 TP_printk("%s %lu %u %d %d %lx",
173 __entry->rcuname, __entry->gp_seq, __entry->level,
174 __entry->grplo, __entry->grphi, __entry->qsmask)
175);
176
177/*
178 * Tracepoint for expedited grace-period events. Takes a string identifying
179 * the RCU flavor, the expedited grace-period sequence number, and a string
180 * identifying the grace-period-related event as follows:
181 *
182 * "snap": Captured snapshot of expedited grace period sequence number.
183 * "start": Started a real expedited grace period.
184 * "reset": Started resetting the tree
185 * "select": Started selecting the CPUs to wait on.
186 * "selectofl": Selected CPU partially offline.
187 * "startwait": Started waiting on selected CPUs.
188 * "end": Ended a real expedited grace period.
189 * "endwake": Woke piggybackers up.
190 * "done": Someone else did the expedited grace period for us.
191 */
192TRACE_EVENT_RCU(rcu_exp_grace_period,
193
194 TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent),
195
196 TP_ARGS(rcuname, gpseq, gpevent),
197
198 TP_STRUCT__entry(
199 __field(const char *, rcuname)
200 __field(unsigned long, gpseq)
201 __field(const char *, gpevent)
202 ),
203
204 TP_fast_assign(
205 __entry->rcuname = rcuname;
206 __entry->gpseq = gpseq;
207 __entry->gpevent = gpevent;
208 ),
209
210 TP_printk("%s %lu %s",
211 __entry->rcuname, __entry->gpseq, __entry->gpevent)
212);
213
214/*
215 * Tracepoint for expedited grace-period funnel-locking events. Takes a
216 * string identifying the RCU flavor, an integer identifying the rcu_node
217 * combining-tree level, another pair of integers identifying the lowest-
218 * and highest-numbered CPU associated with the current rcu_node structure,
219 * and a string. identifying the grace-period-related event as follows:
220 *
221 * "nxtlvl": Advance to next level of rcu_node funnel
222 * "wait": Wait for someone else to do expedited GP
223 */
224TRACE_EVENT_RCU(rcu_exp_funnel_lock,
225
226 TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi,
227 const char *gpevent),
228
229 TP_ARGS(rcuname, level, grplo, grphi, gpevent),
230
231 TP_STRUCT__entry(
232 __field(const char *, rcuname)
233 __field(u8, level)
234 __field(int, grplo)
235 __field(int, grphi)
236 __field(const char *, gpevent)
237 ),
238
239 TP_fast_assign(
240 __entry->rcuname = rcuname;
241 __entry->level = level;
242 __entry->grplo = grplo;
243 __entry->grphi = grphi;
244 __entry->gpevent = gpevent;
245 ),
246
247 TP_printk("%s %d %d %d %s",
248 __entry->rcuname, __entry->level, __entry->grplo,
249 __entry->grphi, __entry->gpevent)
250);
251
252#ifdef CONFIG_RCU_NOCB_CPU
253/*
254 * Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
255 * to assist debugging of these handoffs.
256 *
257 * The first argument is the name of the RCU flavor, and the second is
258 * the number of the offloaded CPU are extracted. The third and final
259 * argument is a string as follows:
260 *
261 * "AlreadyAwake": The to-be-awakened rcuo kthread is already awake.
262 * "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass.
263 * "CBSleep": rcuo CB kthread sleeping waiting for CBs.
264 * "Check": rcuo GP kthread checking specified CPU for work.
265 * "DeferredWake": Timer expired or polled check, time to wake.
266 * "DoWake": The to-be-awakened rcuo kthread needs to be awakened.
267 * "EndSleep": Done waiting for GP for !rcu_nocb_poll.
268 * "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty).
269 * "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened.
270 * "FirstBQwake": FirstBQ plus rcuo kthread must be awakened.
271 * "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty).
272 * "NeedWaitGP": rcuo GP kthread must wait on a grace period.
273 * "Poll": Start of new polling cycle for rcu_nocb_poll.
274 * "Sleep": Sleep waiting for GP for !rcu_nocb_poll.
275 * "Timer": Deferred-wake timer expired.
276 * "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
277 * "WakeEmpty": Wake rcuo kthread, first CB to empty list.
278 * "WakeNot": Don't wake rcuo kthread.
279 * "WakeNotPoll": Don't wake rcuo kthread because it is polling.
280 * "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
281 * "WokeEmpty": rcuo CB kthread woke to find empty list.
282 */
283TRACE_EVENT_RCU(rcu_nocb_wake,
284
285 TP_PROTO(const char *rcuname, int cpu, const char *reason),
286
287 TP_ARGS(rcuname, cpu, reason),
288
289 TP_STRUCT__entry(
290 __field(const char *, rcuname)
291 __field(int, cpu)
292 __field(const char *, reason)
293 ),
294
295 TP_fast_assign(
296 __entry->rcuname = rcuname;
297 __entry->cpu = cpu;
298 __entry->reason = reason;
299 ),
300
301 TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason)
302);
303#endif
304
305/*
306 * Tracepoint for tasks blocking within preemptible-RCU read-side
307 * critical sections. Track the type of RCU (which one day might
308 * include SRCU), the grace-period number that the task is blocking
309 * (the current or the next), and the task's PID.
310 */
311TRACE_EVENT_RCU(rcu_preempt_task,
312
313 TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq),
314
315 TP_ARGS(rcuname, pid, gp_seq),
316
317 TP_STRUCT__entry(
318 __field(const char *, rcuname)
319 __field(unsigned long, gp_seq)
320 __field(int, pid)
321 ),
322
323 TP_fast_assign(
324 __entry->rcuname = rcuname;
325 __entry->gp_seq = gp_seq;
326 __entry->pid = pid;
327 ),
328
329 TP_printk("%s %lu %d",
330 __entry->rcuname, __entry->gp_seq, __entry->pid)
331);
332
333/*
334 * Tracepoint for tasks that blocked within a given preemptible-RCU
335 * read-side critical section exiting that critical section. Track the
336 * type of RCU (which one day might include SRCU) and the task's PID.
337 */
338TRACE_EVENT_RCU(rcu_unlock_preempted_task,
339
340 TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid),
341
342 TP_ARGS(rcuname, gp_seq, pid),
343
344 TP_STRUCT__entry(
345 __field(const char *, rcuname)
346 __field(unsigned long, gp_seq)
347 __field(int, pid)
348 ),
349
350 TP_fast_assign(
351 __entry->rcuname = rcuname;
352 __entry->gp_seq = gp_seq;
353 __entry->pid = pid;
354 ),
355
356 TP_printk("%s %lu %d", __entry->rcuname, __entry->gp_seq, __entry->pid)
357);
358
359/*
360 * Tracepoint for quiescent-state-reporting events. These are
361 * distinguished by the type of RCU, the grace-period number, the
362 * mask of quiescent lower-level entities, the rcu_node structure level,
363 * the starting and ending CPU covered by the rcu_node structure, and
364 * whether there are any blocked tasks blocking the current grace period.
365 * All but the type of RCU are extracted from the rcu_node structure.
366 */
367TRACE_EVENT_RCU(rcu_quiescent_state_report,
368
369 TP_PROTO(const char *rcuname, unsigned long gp_seq,
370 unsigned long mask, unsigned long qsmask,
371 u8 level, int grplo, int grphi, int gp_tasks),
372
373 TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks),
374
375 TP_STRUCT__entry(
376 __field(const char *, rcuname)
377 __field(unsigned long, gp_seq)
378 __field(unsigned long, mask)
379 __field(unsigned long, qsmask)
380 __field(u8, level)
381 __field(int, grplo)
382 __field(int, grphi)
383 __field(u8, gp_tasks)
384 ),
385
386 TP_fast_assign(
387 __entry->rcuname = rcuname;
388 __entry->gp_seq = gp_seq;
389 __entry->mask = mask;
390 __entry->qsmask = qsmask;
391 __entry->level = level;
392 __entry->grplo = grplo;
393 __entry->grphi = grphi;
394 __entry->gp_tasks = gp_tasks;
395 ),
396
397 TP_printk("%s %lu %lx>%lx %u %d %d %u",
398 __entry->rcuname, __entry->gp_seq,
399 __entry->mask, __entry->qsmask, __entry->level,
400 __entry->grplo, __entry->grphi, __entry->gp_tasks)
401);
402
403/*
404 * Tracepoint for quiescent states detected by force_quiescent_state().
405 * These trace events include the type of RCU, the grace-period number
406 * that was blocked by the CPU, the CPU itself, and the type of quiescent
407 * state, which can be "dti" for dyntick-idle mode or "kick" when kicking
408 * a CPU that has been in dyntick-idle mode for too long.
409 */
410TRACE_EVENT_RCU(rcu_fqs,
411
412 TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent),
413
414 TP_ARGS(rcuname, gp_seq, cpu, qsevent),
415
416 TP_STRUCT__entry(
417 __field(const char *, rcuname)
418 __field(unsigned long, gp_seq)
419 __field(int, cpu)
420 __field(const char *, qsevent)
421 ),
422
423 TP_fast_assign(
424 __entry->rcuname = rcuname;
425 __entry->gp_seq = gp_seq;
426 __entry->cpu = cpu;
427 __entry->qsevent = qsevent;
428 ),
429
430 TP_printk("%s %lu %d %s",
431 __entry->rcuname, __entry->gp_seq,
432 __entry->cpu, __entry->qsevent)
433);
434
435#endif /* #if defined(CONFIG_TREE_RCU) */
436
437/*
438 * Tracepoint for dyntick-idle entry/exit events. These take 2 strings
439 * as argument:
440 * polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not
441 * being in dyntick-idle mode.
442 * context: "USER" or "IDLE" or "IRQ".
443 * NMIs nested in IRQs are inferred with dynticks_nesting > 1 in IRQ context.
444 *
445 * These events also take a pair of numbers, which indicate the nesting
446 * depth before and after the event of interest, and a third number that is
447 * the ->dynticks counter. Note that task-related and interrupt-related
448 * events use two separate counters, and that the "++=" and "--=" events
449 * for irq/NMI will change the counter by two, otherwise by one.
450 */
451TRACE_EVENT_RCU(rcu_dyntick,
452
453 TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
454
455 TP_ARGS(polarity, oldnesting, newnesting, dynticks),
456
457 TP_STRUCT__entry(
458 __field(const char *, polarity)
459 __field(long, oldnesting)
460 __field(long, newnesting)
461 __field(int, dynticks)
462 ),
463
464 TP_fast_assign(
465 __entry->polarity = polarity;
466 __entry->oldnesting = oldnesting;
467 __entry->newnesting = newnesting;
468 __entry->dynticks = dynticks;
469 ),
470
471 TP_printk("%s %lx %lx %#3x", __entry->polarity,
472 __entry->oldnesting, __entry->newnesting,
473 __entry->dynticks & 0xfff)
474);
475
476/*
477 * Tracepoint for the registration of a single RCU callback function.
478 * The first argument is the type of RCU, the second argument is
479 * a pointer to the RCU callback itself, the third element is the
480 * number of lazy callbacks queued, and the fourth element is the
481 * total number of callbacks queued.
482 */
483TRACE_EVENT_RCU(rcu_callback,
484
485 TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen),
486
487 TP_ARGS(rcuname, rhp, qlen),
488
489 TP_STRUCT__entry(
490 __field(const char *, rcuname)
491 __field(void *, rhp)
492 __field(void *, func)
493 __field(long, qlen)
494 ),
495
496 TP_fast_assign(
497 __entry->rcuname = rcuname;
498 __entry->rhp = rhp;
499 __entry->func = rhp->func;
500 __entry->qlen = qlen;
501 ),
502
503 TP_printk("%s rhp=%p func=%ps %ld",
504 __entry->rcuname, __entry->rhp, __entry->func,
505 __entry->qlen)
506);
507
508/*
509 * Tracepoint for the registration of a single RCU callback of the special
510 * kvfree() form. The first argument is the RCU type, the second argument
511 * is a pointer to the RCU callback, the third argument is the offset
512 * of the callback within the enclosing RCU-protected data structure,
513 * the fourth argument is the number of lazy callbacks queued, and the
514 * fifth argument is the total number of callbacks queued.
515 */
516TRACE_EVENT_RCU(rcu_kvfree_callback,
517
518 TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
519 long qlen),
520
521 TP_ARGS(rcuname, rhp, offset, qlen),
522
523 TP_STRUCT__entry(
524 __field(const char *, rcuname)
525 __field(void *, rhp)
526 __field(unsigned long, offset)
527 __field(long, qlen)
528 ),
529
530 TP_fast_assign(
531 __entry->rcuname = rcuname;
532 __entry->rhp = rhp;
533 __entry->offset = offset;
534 __entry->qlen = qlen;
535 ),
536
537 TP_printk("%s rhp=%p func=%ld %ld",
538 __entry->rcuname, __entry->rhp, __entry->offset,
539 __entry->qlen)
540);
541
542/*
543 * Tracepoint for marking the beginning rcu_do_batch, performed to start
544 * RCU callback invocation. The first argument is the RCU flavor,
545 * the second is the number of lazy callbacks queued, the third is
546 * the total number of callbacks queued, and the fourth argument is
547 * the current RCU-callback batch limit.
548 */
549TRACE_EVENT_RCU(rcu_batch_start,
550
551 TP_PROTO(const char *rcuname, long qlen, long blimit),
552
553 TP_ARGS(rcuname, qlen, blimit),
554
555 TP_STRUCT__entry(
556 __field(const char *, rcuname)
557 __field(long, qlen)
558 __field(long, blimit)
559 ),
560
561 TP_fast_assign(
562 __entry->rcuname = rcuname;
563 __entry->qlen = qlen;
564 __entry->blimit = blimit;
565 ),
566
567 TP_printk("%s CBs=%ld bl=%ld",
568 __entry->rcuname, __entry->qlen, __entry->blimit)
569);
570
571/*
572 * Tracepoint for the invocation of a single RCU callback function.
573 * The first argument is the type of RCU, and the second argument is
574 * a pointer to the RCU callback itself.
575 */
576TRACE_EVENT_RCU(rcu_invoke_callback,
577
578 TP_PROTO(const char *rcuname, struct rcu_head *rhp),
579
580 TP_ARGS(rcuname, rhp),
581
582 TP_STRUCT__entry(
583 __field(const char *, rcuname)
584 __field(void *, rhp)
585 __field(void *, func)
586 ),
587
588 TP_fast_assign(
589 __entry->rcuname = rcuname;
590 __entry->rhp = rhp;
591 __entry->func = rhp->func;
592 ),
593
594 TP_printk("%s rhp=%p func=%ps",
595 __entry->rcuname, __entry->rhp, __entry->func)
596);
597
598/*
599 * Tracepoint for the invocation of a single RCU callback of the special
600 * kvfree() form. The first argument is the RCU flavor, the second
601 * argument is a pointer to the RCU callback, and the third argument
602 * is the offset of the callback within the enclosing RCU-protected
603 * data structure.
604 */
605TRACE_EVENT_RCU(rcu_invoke_kvfree_callback,
606
607 TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
608
609 TP_ARGS(rcuname, rhp, offset),
610
611 TP_STRUCT__entry(
612 __field(const char *, rcuname)
613 __field(void *, rhp)
614 __field(unsigned long, offset)
615 ),
616
617 TP_fast_assign(
618 __entry->rcuname = rcuname;
619 __entry->rhp = rhp;
620 __entry->offset = offset;
621 ),
622
623 TP_printk("%s rhp=%p func=%ld",
624 __entry->rcuname, __entry->rhp, __entry->offset)
625);
626
627/*
628 * Tracepoint for the invocation of a single RCU callback of the special
629 * kfree_bulk() form. The first argument is the RCU flavor, the second
630 * argument is a number of elements in array to free, the third is an
631 * address of the array holding nr_records entries.
632 */
633TRACE_EVENT_RCU(rcu_invoke_kfree_bulk_callback,
634
635 TP_PROTO(const char *rcuname, unsigned long nr_records, void **p),
636
637 TP_ARGS(rcuname, nr_records, p),
638
639 TP_STRUCT__entry(
640 __field(const char *, rcuname)
641 __field(unsigned long, nr_records)
642 __field(void **, p)
643 ),
644
645 TP_fast_assign(
646 __entry->rcuname = rcuname;
647 __entry->nr_records = nr_records;
648 __entry->p = p;
649 ),
650
651 TP_printk("%s bulk=0x%p nr_records=%lu",
652 __entry->rcuname, __entry->p, __entry->nr_records)
653);
654
655/*
656 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
657 * invoked. The first argument is the name of the RCU flavor,
658 * the second argument is number of callbacks actually invoked,
659 * the third argument (cb) is whether or not any of the callbacks that
660 * were ready to invoke at the beginning of this batch are still
661 * queued, the fourth argument (nr) is the return value of need_resched(),
662 * the fifth argument (iit) is 1 if the current task is the idle task,
663 * and the sixth argument (risk) is the return value from
664 * rcu_is_callbacks_kthread().
665 */
666TRACE_EVENT_RCU(rcu_batch_end,
667
668 TP_PROTO(const char *rcuname, int callbacks_invoked,
669 char cb, char nr, char iit, char risk),
670
671 TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
672
673 TP_STRUCT__entry(
674 __field(const char *, rcuname)
675 __field(int, callbacks_invoked)
676 __field(char, cb)
677 __field(char, nr)
678 __field(char, iit)
679 __field(char, risk)
680 ),
681
682 TP_fast_assign(
683 __entry->rcuname = rcuname;
684 __entry->callbacks_invoked = callbacks_invoked;
685 __entry->cb = cb;
686 __entry->nr = nr;
687 __entry->iit = iit;
688 __entry->risk = risk;
689 ),
690
691 TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
692 __entry->rcuname, __entry->callbacks_invoked,
693 __entry->cb ? 'C' : '.',
694 __entry->nr ? 'S' : '.',
695 __entry->iit ? 'I' : '.',
696 __entry->risk ? 'R' : '.')
697);
698
699/*
700 * Tracepoint for rcutorture readers. The first argument is the name
701 * of the RCU flavor from rcutorture's viewpoint and the second argument
702 * is the callback address. The third argument is the start time in
703 * seconds, and the last two arguments are the grace period numbers
704 * at the beginning and end of the read, respectively. Note that the
705 * callback address can be NULL.
706 */
707#define RCUTORTURENAME_LEN 8
708TRACE_EVENT_RCU(rcu_torture_read,
709
710 TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
711 unsigned long secs, unsigned long c_old, unsigned long c),
712
713 TP_ARGS(rcutorturename, rhp, secs, c_old, c),
714
715 TP_STRUCT__entry(
716 __field(char, rcutorturename[RCUTORTURENAME_LEN])
717 __field(struct rcu_head *, rhp)
718 __field(unsigned long, secs)
719 __field(unsigned long, c_old)
720 __field(unsigned long, c)
721 ),
722
723 TP_fast_assign(
724 strncpy(__entry->rcutorturename, rcutorturename,
725 RCUTORTURENAME_LEN);
726 __entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0;
727 __entry->rhp = rhp;
728 __entry->secs = secs;
729 __entry->c_old = c_old;
730 __entry->c = c;
731 ),
732
733 TP_printk("%s torture read %p %luus c: %lu %lu",
734 __entry->rcutorturename, __entry->rhp,
735 __entry->secs, __entry->c_old, __entry->c)
736);
737
738/*
739 * Tracepoint for rcu_barrier() execution. The string "s" describes
740 * the rcu_barrier phase:
741 * "Begin": rcu_barrier() started.
742 * "EarlyExit": rcu_barrier() piggybacked, thus early exit.
743 * "Inc1": rcu_barrier() piggyback check counter incremented.
744 * "OfflineNoCBQ": rcu_barrier() found offline no-CBs CPU with callbacks.
745 * "OnlineQ": rcu_barrier() found online CPU with callbacks.
746 * "OnlineNQ": rcu_barrier() found online CPU, no callbacks.
747 * "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
748 * "IRQNQ": An rcu_barrier_callback() callback found no callbacks.
749 * "CB": An rcu_barrier_callback() invoked a callback, not the last.
750 * "LastCB": An rcu_barrier_callback() invoked the last callback.
751 * "Inc2": rcu_barrier() piggyback check counter incremented.
752 * The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
753 * is the count of remaining callbacks, and "done" is the piggybacking count.
754 */
755TRACE_EVENT_RCU(rcu_barrier,
756
757 TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
758
759 TP_ARGS(rcuname, s, cpu, cnt, done),
760
761 TP_STRUCT__entry(
762 __field(const char *, rcuname)
763 __field(const char *, s)
764 __field(int, cpu)
765 __field(int, cnt)
766 __field(unsigned long, done)
767 ),
768
769 TP_fast_assign(
770 __entry->rcuname = rcuname;
771 __entry->s = s;
772 __entry->cpu = cpu;
773 __entry->cnt = cnt;
774 __entry->done = done;
775 ),
776
777 TP_printk("%s %s cpu %d remaining %d # %lu",
778 __entry->rcuname, __entry->s, __entry->cpu, __entry->cnt,
779 __entry->done)
780);
781
782#endif /* _TRACE_RCU_H */
783
784/* This part must be outside protection */
785#include <trace/define_trace.h>
1#undef TRACE_SYSTEM
2#define TRACE_SYSTEM rcu
3
4#if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
5#define _TRACE_RCU_H
6
7#include <linux/tracepoint.h>
8
9/*
10 * Tracepoint for start/end markers used for utilization calculations.
11 * By convention, the string is of the following forms:
12 *
13 * "Start <activity>" -- Mark the start of the specified activity,
14 * such as "context switch". Nesting is permitted.
15 * "End <activity>" -- Mark the end of the specified activity.
16 *
17 * An "@" character within "<activity>" is a comment character: Data
18 * reduction scripts will ignore the "@" and the remainder of the line.
19 */
20TRACE_EVENT(rcu_utilization,
21
22 TP_PROTO(char *s),
23
24 TP_ARGS(s),
25
26 TP_STRUCT__entry(
27 __field(char *, s)
28 ),
29
30 TP_fast_assign(
31 __entry->s = s;
32 ),
33
34 TP_printk("%s", __entry->s)
35);
36
37#ifdef CONFIG_RCU_TRACE
38
39#if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU)
40
41/*
42 * Tracepoint for grace-period events: starting and ending a grace
43 * period ("start" and "end", respectively), a CPU noting the start
44 * of a new grace period or the end of an old grace period ("cpustart"
45 * and "cpuend", respectively), a CPU passing through a quiescent
46 * state ("cpuqs"), a CPU coming online or going offline ("cpuonl"
47 * and "cpuofl", respectively), and a CPU being kicked for being too
48 * long in dyntick-idle mode ("kick").
49 */
50TRACE_EVENT(rcu_grace_period,
51
52 TP_PROTO(char *rcuname, unsigned long gpnum, char *gpevent),
53
54 TP_ARGS(rcuname, gpnum, gpevent),
55
56 TP_STRUCT__entry(
57 __field(char *, rcuname)
58 __field(unsigned long, gpnum)
59 __field(char *, gpevent)
60 ),
61
62 TP_fast_assign(
63 __entry->rcuname = rcuname;
64 __entry->gpnum = gpnum;
65 __entry->gpevent = gpevent;
66 ),
67
68 TP_printk("%s %lu %s",
69 __entry->rcuname, __entry->gpnum, __entry->gpevent)
70);
71
72/*
73 * Tracepoint for grace-period-initialization events. These are
74 * distinguished by the type of RCU, the new grace-period number, the
75 * rcu_node structure level, the starting and ending CPU covered by the
76 * rcu_node structure, and the mask of CPUs that will be waited for.
77 * All but the type of RCU are extracted from the rcu_node structure.
78 */
79TRACE_EVENT(rcu_grace_period_init,
80
81 TP_PROTO(char *rcuname, unsigned long gpnum, u8 level,
82 int grplo, int grphi, unsigned long qsmask),
83
84 TP_ARGS(rcuname, gpnum, level, grplo, grphi, qsmask),
85
86 TP_STRUCT__entry(
87 __field(char *, rcuname)
88 __field(unsigned long, gpnum)
89 __field(u8, level)
90 __field(int, grplo)
91 __field(int, grphi)
92 __field(unsigned long, qsmask)
93 ),
94
95 TP_fast_assign(
96 __entry->rcuname = rcuname;
97 __entry->gpnum = gpnum;
98 __entry->level = level;
99 __entry->grplo = grplo;
100 __entry->grphi = grphi;
101 __entry->qsmask = qsmask;
102 ),
103
104 TP_printk("%s %lu %u %d %d %lx",
105 __entry->rcuname, __entry->gpnum, __entry->level,
106 __entry->grplo, __entry->grphi, __entry->qsmask)
107);
108
109/*
110 * Tracepoint for tasks blocking within preemptible-RCU read-side
111 * critical sections. Track the type of RCU (which one day might
112 * include SRCU), the grace-period number that the task is blocking
113 * (the current or the next), and the task's PID.
114 */
115TRACE_EVENT(rcu_preempt_task,
116
117 TP_PROTO(char *rcuname, int pid, unsigned long gpnum),
118
119 TP_ARGS(rcuname, pid, gpnum),
120
121 TP_STRUCT__entry(
122 __field(char *, rcuname)
123 __field(unsigned long, gpnum)
124 __field(int, pid)
125 ),
126
127 TP_fast_assign(
128 __entry->rcuname = rcuname;
129 __entry->gpnum = gpnum;
130 __entry->pid = pid;
131 ),
132
133 TP_printk("%s %lu %d",
134 __entry->rcuname, __entry->gpnum, __entry->pid)
135);
136
137/*
138 * Tracepoint for tasks that blocked within a given preemptible-RCU
139 * read-side critical section exiting that critical section. Track the
140 * type of RCU (which one day might include SRCU) and the task's PID.
141 */
142TRACE_EVENT(rcu_unlock_preempted_task,
143
144 TP_PROTO(char *rcuname, unsigned long gpnum, int pid),
145
146 TP_ARGS(rcuname, gpnum, pid),
147
148 TP_STRUCT__entry(
149 __field(char *, rcuname)
150 __field(unsigned long, gpnum)
151 __field(int, pid)
152 ),
153
154 TP_fast_assign(
155 __entry->rcuname = rcuname;
156 __entry->gpnum = gpnum;
157 __entry->pid = pid;
158 ),
159
160 TP_printk("%s %lu %d", __entry->rcuname, __entry->gpnum, __entry->pid)
161);
162
163/*
164 * Tracepoint for quiescent-state-reporting events. These are
165 * distinguished by the type of RCU, the grace-period number, the
166 * mask of quiescent lower-level entities, the rcu_node structure level,
167 * the starting and ending CPU covered by the rcu_node structure, and
168 * whether there are any blocked tasks blocking the current grace period.
169 * All but the type of RCU are extracted from the rcu_node structure.
170 */
171TRACE_EVENT(rcu_quiescent_state_report,
172
173 TP_PROTO(char *rcuname, unsigned long gpnum,
174 unsigned long mask, unsigned long qsmask,
175 u8 level, int grplo, int grphi, int gp_tasks),
176
177 TP_ARGS(rcuname, gpnum, mask, qsmask, level, grplo, grphi, gp_tasks),
178
179 TP_STRUCT__entry(
180 __field(char *, rcuname)
181 __field(unsigned long, gpnum)
182 __field(unsigned long, mask)
183 __field(unsigned long, qsmask)
184 __field(u8, level)
185 __field(int, grplo)
186 __field(int, grphi)
187 __field(u8, gp_tasks)
188 ),
189
190 TP_fast_assign(
191 __entry->rcuname = rcuname;
192 __entry->gpnum = gpnum;
193 __entry->mask = mask;
194 __entry->qsmask = qsmask;
195 __entry->level = level;
196 __entry->grplo = grplo;
197 __entry->grphi = grphi;
198 __entry->gp_tasks = gp_tasks;
199 ),
200
201 TP_printk("%s %lu %lx>%lx %u %d %d %u",
202 __entry->rcuname, __entry->gpnum,
203 __entry->mask, __entry->qsmask, __entry->level,
204 __entry->grplo, __entry->grphi, __entry->gp_tasks)
205);
206
207/*
208 * Tracepoint for quiescent states detected by force_quiescent_state().
209 * These trace events include the type of RCU, the grace-period number
210 * that was blocked by the CPU, the CPU itself, and the type of quiescent
211 * state, which can be "dti" for dyntick-idle mode, "ofl" for CPU offline,
212 * or "kick" when kicking a CPU that has been in dyntick-idle mode for
213 * too long.
214 */
215TRACE_EVENT(rcu_fqs,
216
217 TP_PROTO(char *rcuname, unsigned long gpnum, int cpu, char *qsevent),
218
219 TP_ARGS(rcuname, gpnum, cpu, qsevent),
220
221 TP_STRUCT__entry(
222 __field(char *, rcuname)
223 __field(unsigned long, gpnum)
224 __field(int, cpu)
225 __field(char *, qsevent)
226 ),
227
228 TP_fast_assign(
229 __entry->rcuname = rcuname;
230 __entry->gpnum = gpnum;
231 __entry->cpu = cpu;
232 __entry->qsevent = qsevent;
233 ),
234
235 TP_printk("%s %lu %d %s",
236 __entry->rcuname, __entry->gpnum,
237 __entry->cpu, __entry->qsevent)
238);
239
240#endif /* #if defined(CONFIG_TREE_RCU) || defined(CONFIG_TREE_PREEMPT_RCU) */
241
242/*
243 * Tracepoint for dyntick-idle entry/exit events. These take a string
244 * as argument: "Start" for entering dyntick-idle mode, "End" for
245 * leaving it, "--=" for events moving towards idle, and "++=" for events
246 * moving away from idle. "Error on entry: not idle task" and "Error on
247 * exit: not idle task" indicate that a non-idle task is erroneously
248 * toying with the idle loop.
249 *
250 * These events also take a pair of numbers, which indicate the nesting
251 * depth before and after the event of interest. Note that task-related
252 * events use the upper bits of each number, while interrupt-related
253 * events use the lower bits.
254 */
255TRACE_EVENT(rcu_dyntick,
256
257 TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
258
259 TP_ARGS(polarity, oldnesting, newnesting),
260
261 TP_STRUCT__entry(
262 __field(char *, polarity)
263 __field(long long, oldnesting)
264 __field(long long, newnesting)
265 ),
266
267 TP_fast_assign(
268 __entry->polarity = polarity;
269 __entry->oldnesting = oldnesting;
270 __entry->newnesting = newnesting;
271 ),
272
273 TP_printk("%s %llx %llx", __entry->polarity,
274 __entry->oldnesting, __entry->newnesting)
275);
276
277/*
278 * Tracepoint for RCU preparation for idle, the goal being to get RCU
279 * processing done so that the current CPU can shut off its scheduling
280 * clock and enter dyntick-idle mode. One way to accomplish this is
281 * to drain all RCU callbacks from this CPU, and the other is to have
282 * done everything RCU requires for the current grace period. In this
283 * latter case, the CPU will be awakened at the end of the current grace
284 * period in order to process the remainder of its callbacks.
285 *
286 * These tracepoints take a string as argument:
287 *
288 * "No callbacks": Nothing to do, no callbacks on this CPU.
289 * "In holdoff": Nothing to do, holding off after unsuccessful attempt.
290 * "Begin holdoff": Attempt failed, don't retry until next jiffy.
291 * "Dyntick with callbacks": Entering dyntick-idle despite callbacks.
292 * "Dyntick with lazy callbacks": Entering dyntick-idle w/lazy callbacks.
293 * "More callbacks": Still more callbacks, try again to clear them out.
294 * "Callbacks drained": All callbacks processed, off to dyntick idle!
295 * "Timer": Timer fired to cause CPU to continue processing callbacks.
296 * "Demigrate": Timer fired on wrong CPU, woke up correct CPU.
297 * "Cleanup after idle": Idle exited, timer canceled.
298 */
299TRACE_EVENT(rcu_prep_idle,
300
301 TP_PROTO(char *reason),
302
303 TP_ARGS(reason),
304
305 TP_STRUCT__entry(
306 __field(char *, reason)
307 ),
308
309 TP_fast_assign(
310 __entry->reason = reason;
311 ),
312
313 TP_printk("%s", __entry->reason)
314);
315
316/*
317 * Tracepoint for the registration of a single RCU callback function.
318 * The first argument is the type of RCU, the second argument is
319 * a pointer to the RCU callback itself, the third element is the
320 * number of lazy callbacks queued, and the fourth element is the
321 * total number of callbacks queued.
322 */
323TRACE_EVENT(rcu_callback,
324
325 TP_PROTO(char *rcuname, struct rcu_head *rhp, long qlen_lazy,
326 long qlen),
327
328 TP_ARGS(rcuname, rhp, qlen_lazy, qlen),
329
330 TP_STRUCT__entry(
331 __field(char *, rcuname)
332 __field(void *, rhp)
333 __field(void *, func)
334 __field(long, qlen_lazy)
335 __field(long, qlen)
336 ),
337
338 TP_fast_assign(
339 __entry->rcuname = rcuname;
340 __entry->rhp = rhp;
341 __entry->func = rhp->func;
342 __entry->qlen_lazy = qlen_lazy;
343 __entry->qlen = qlen;
344 ),
345
346 TP_printk("%s rhp=%p func=%pf %ld/%ld",
347 __entry->rcuname, __entry->rhp, __entry->func,
348 __entry->qlen_lazy, __entry->qlen)
349);
350
351/*
352 * Tracepoint for the registration of a single RCU callback of the special
353 * kfree() form. The first argument is the RCU type, the second argument
354 * is a pointer to the RCU callback, the third argument is the offset
355 * of the callback within the enclosing RCU-protected data structure,
356 * the fourth argument is the number of lazy callbacks queued, and the
357 * fifth argument is the total number of callbacks queued.
358 */
359TRACE_EVENT(rcu_kfree_callback,
360
361 TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset,
362 long qlen_lazy, long qlen),
363
364 TP_ARGS(rcuname, rhp, offset, qlen_lazy, qlen),
365
366 TP_STRUCT__entry(
367 __field(char *, rcuname)
368 __field(void *, rhp)
369 __field(unsigned long, offset)
370 __field(long, qlen_lazy)
371 __field(long, qlen)
372 ),
373
374 TP_fast_assign(
375 __entry->rcuname = rcuname;
376 __entry->rhp = rhp;
377 __entry->offset = offset;
378 __entry->qlen_lazy = qlen_lazy;
379 __entry->qlen = qlen;
380 ),
381
382 TP_printk("%s rhp=%p func=%ld %ld/%ld",
383 __entry->rcuname, __entry->rhp, __entry->offset,
384 __entry->qlen_lazy, __entry->qlen)
385);
386
387/*
388 * Tracepoint for marking the beginning rcu_do_batch, performed to start
389 * RCU callback invocation. The first argument is the RCU flavor,
390 * the second is the number of lazy callbacks queued, the third is
391 * the total number of callbacks queued, and the fourth argument is
392 * the current RCU-callback batch limit.
393 */
394TRACE_EVENT(rcu_batch_start,
395
396 TP_PROTO(char *rcuname, long qlen_lazy, long qlen, int blimit),
397
398 TP_ARGS(rcuname, qlen_lazy, qlen, blimit),
399
400 TP_STRUCT__entry(
401 __field(char *, rcuname)
402 __field(long, qlen_lazy)
403 __field(long, qlen)
404 __field(int, blimit)
405 ),
406
407 TP_fast_assign(
408 __entry->rcuname = rcuname;
409 __entry->qlen_lazy = qlen_lazy;
410 __entry->qlen = qlen;
411 __entry->blimit = blimit;
412 ),
413
414 TP_printk("%s CBs=%ld/%ld bl=%d",
415 __entry->rcuname, __entry->qlen_lazy, __entry->qlen,
416 __entry->blimit)
417);
418
419/*
420 * Tracepoint for the invocation of a single RCU callback function.
421 * The first argument is the type of RCU, and the second argument is
422 * a pointer to the RCU callback itself.
423 */
424TRACE_EVENT(rcu_invoke_callback,
425
426 TP_PROTO(char *rcuname, struct rcu_head *rhp),
427
428 TP_ARGS(rcuname, rhp),
429
430 TP_STRUCT__entry(
431 __field(char *, rcuname)
432 __field(void *, rhp)
433 __field(void *, func)
434 ),
435
436 TP_fast_assign(
437 __entry->rcuname = rcuname;
438 __entry->rhp = rhp;
439 __entry->func = rhp->func;
440 ),
441
442 TP_printk("%s rhp=%p func=%pf",
443 __entry->rcuname, __entry->rhp, __entry->func)
444);
445
446/*
447 * Tracepoint for the invocation of a single RCU callback of the special
448 * kfree() form. The first argument is the RCU flavor, the second
449 * argument is a pointer to the RCU callback, and the third argument
450 * is the offset of the callback within the enclosing RCU-protected
451 * data structure.
452 */
453TRACE_EVENT(rcu_invoke_kfree_callback,
454
455 TP_PROTO(char *rcuname, struct rcu_head *rhp, unsigned long offset),
456
457 TP_ARGS(rcuname, rhp, offset),
458
459 TP_STRUCT__entry(
460 __field(char *, rcuname)
461 __field(void *, rhp)
462 __field(unsigned long, offset)
463 ),
464
465 TP_fast_assign(
466 __entry->rcuname = rcuname;
467 __entry->rhp = rhp;
468 __entry->offset = offset;
469 ),
470
471 TP_printk("%s rhp=%p func=%ld",
472 __entry->rcuname, __entry->rhp, __entry->offset)
473);
474
475/*
476 * Tracepoint for exiting rcu_do_batch after RCU callbacks have been
477 * invoked. The first argument is the name of the RCU flavor,
478 * the second argument is number of callbacks actually invoked,
479 * the third argument (cb) is whether or not any of the callbacks that
480 * were ready to invoke at the beginning of this batch are still
481 * queued, the fourth argument (nr) is the return value of need_resched(),
482 * the fifth argument (iit) is 1 if the current task is the idle task,
483 * and the sixth argument (risk) is the return value from
484 * rcu_is_callbacks_kthread().
485 */
486TRACE_EVENT(rcu_batch_end,
487
488 TP_PROTO(char *rcuname, int callbacks_invoked,
489 bool cb, bool nr, bool iit, bool risk),
490
491 TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
492
493 TP_STRUCT__entry(
494 __field(char *, rcuname)
495 __field(int, callbacks_invoked)
496 __field(bool, cb)
497 __field(bool, nr)
498 __field(bool, iit)
499 __field(bool, risk)
500 ),
501
502 TP_fast_assign(
503 __entry->rcuname = rcuname;
504 __entry->callbacks_invoked = callbacks_invoked;
505 __entry->cb = cb;
506 __entry->nr = nr;
507 __entry->iit = iit;
508 __entry->risk = risk;
509 ),
510
511 TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
512 __entry->rcuname, __entry->callbacks_invoked,
513 __entry->cb ? 'C' : '.',
514 __entry->nr ? 'S' : '.',
515 __entry->iit ? 'I' : '.',
516 __entry->risk ? 'R' : '.')
517);
518
519/*
520 * Tracepoint for rcutorture readers. The first argument is the name
521 * of the RCU flavor from rcutorture's viewpoint and the second argument
522 * is the callback address.
523 */
524TRACE_EVENT(rcu_torture_read,
525
526 TP_PROTO(char *rcutorturename, struct rcu_head *rhp),
527
528 TP_ARGS(rcutorturename, rhp),
529
530 TP_STRUCT__entry(
531 __field(char *, rcutorturename)
532 __field(struct rcu_head *, rhp)
533 ),
534
535 TP_fast_assign(
536 __entry->rcutorturename = rcutorturename;
537 __entry->rhp = rhp;
538 ),
539
540 TP_printk("%s torture read %p",
541 __entry->rcutorturename, __entry->rhp)
542);
543
544#else /* #ifdef CONFIG_RCU_TRACE */
545
546#define trace_rcu_grace_period(rcuname, gpnum, gpevent) do { } while (0)
547#define trace_rcu_grace_period_init(rcuname, gpnum, level, grplo, grphi, \
548 qsmask) do { } while (0)
549#define trace_rcu_preempt_task(rcuname, pid, gpnum) do { } while (0)
550#define trace_rcu_unlock_preempted_task(rcuname, gpnum, pid) do { } while (0)
551#define trace_rcu_quiescent_state_report(rcuname, gpnum, mask, qsmask, level, \
552 grplo, grphi, gp_tasks) do { } \
553 while (0)
554#define trace_rcu_fqs(rcuname, gpnum, cpu, qsevent) do { } while (0)
555#define trace_rcu_dyntick(polarity, oldnesting, newnesting) do { } while (0)
556#define trace_rcu_prep_idle(reason) do { } while (0)
557#define trace_rcu_callback(rcuname, rhp, qlen_lazy, qlen) do { } while (0)
558#define trace_rcu_kfree_callback(rcuname, rhp, offset, qlen_lazy, qlen) \
559 do { } while (0)
560#define trace_rcu_batch_start(rcuname, qlen_lazy, qlen, blimit) \
561 do { } while (0)
562#define trace_rcu_invoke_callback(rcuname, rhp) do { } while (0)
563#define trace_rcu_invoke_kfree_callback(rcuname, rhp, offset) do { } while (0)
564#define trace_rcu_batch_end(rcuname, callbacks_invoked, cb, nr, iit, risk) \
565 do { } while (0)
566#define trace_rcu_torture_read(rcutorturename, rhp) do { } while (0)
567
568#endif /* #else #ifdef CONFIG_RCU_TRACE */
569
570#endif /* _TRACE_RCU_H */
571
572/* This part must be outside protection */
573#include <trace/define_trace.h>