Loading...
1/* internal.h: mm/ internal definitions
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#ifndef __MM_INTERNAL_H
12#define __MM_INTERNAL_H
13
14#include <linux/mm.h>
15
16void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
17 unsigned long floor, unsigned long ceiling);
18
19static inline void set_page_count(struct page *page, int v)
20{
21 atomic_set(&page->_count, v);
22}
23
24/*
25 * Turn a non-refcounted page (->_count == 0) into refcounted with
26 * a count of one.
27 */
28static inline void set_page_refcounted(struct page *page)
29{
30 VM_BUG_ON(PageTail(page));
31 VM_BUG_ON(atomic_read(&page->_count));
32 set_page_count(page, 1);
33}
34
35static inline void __put_page(struct page *page)
36{
37 atomic_dec(&page->_count);
38}
39
40extern unsigned long highest_memmap_pfn;
41
42/*
43 * in mm/vmscan.c:
44 */
45extern int isolate_lru_page(struct page *page);
46extern void putback_lru_page(struct page *page);
47
48/*
49 * in mm/page_alloc.c
50 */
51extern void __free_pages_bootmem(struct page *page, unsigned int order);
52extern void prep_compound_page(struct page *page, unsigned long order);
53#ifdef CONFIG_MEMORY_FAILURE
54extern bool is_free_buddy_page(struct page *page);
55#endif
56
57
58/*
59 * function for dealing with page's order in buddy system.
60 * zone->lock is already acquired when we use these.
61 * So, we don't need atomic page->flags operations here.
62 */
63static inline unsigned long page_order(struct page *page)
64{
65 /* PageBuddy() must be checked by the caller */
66 return page_private(page);
67}
68
69/* mm/util.c */
70void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
71 struct vm_area_struct *prev, struct rb_node *rb_parent);
72
73#ifdef CONFIG_MMU
74extern long mlock_vma_pages_range(struct vm_area_struct *vma,
75 unsigned long start, unsigned long end);
76extern void munlock_vma_pages_range(struct vm_area_struct *vma,
77 unsigned long start, unsigned long end);
78static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
79{
80 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
81}
82
83/*
84 * Called only in fault path via page_evictable() for a new page
85 * to determine if it's being mapped into a LOCKED vma.
86 * If so, mark page as mlocked.
87 */
88static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page)
89{
90 VM_BUG_ON(PageLRU(page));
91
92 if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
93 return 0;
94
95 if (!TestSetPageMlocked(page)) {
96 inc_zone_page_state(page, NR_MLOCK);
97 count_vm_event(UNEVICTABLE_PGMLOCKED);
98 }
99 return 1;
100}
101
102/*
103 * must be called with vma's mmap_sem held for read or write, and page locked.
104 */
105extern void mlock_vma_page(struct page *page);
106extern void munlock_vma_page(struct page *page);
107
108/*
109 * Clear the page's PageMlocked(). This can be useful in a situation where
110 * we want to unconditionally remove a page from the pagecache -- e.g.,
111 * on truncation or freeing.
112 *
113 * It is legal to call this function for any page, mlocked or not.
114 * If called for a page that is still mapped by mlocked vmas, all we do
115 * is revert to lazy LRU behaviour -- semantics are not broken.
116 */
117extern void __clear_page_mlock(struct page *page);
118static inline void clear_page_mlock(struct page *page)
119{
120 if (unlikely(TestClearPageMlocked(page)))
121 __clear_page_mlock(page);
122}
123
124/*
125 * mlock_migrate_page - called only from migrate_page_copy() to
126 * migrate the Mlocked page flag; update statistics.
127 */
128static inline void mlock_migrate_page(struct page *newpage, struct page *page)
129{
130 if (TestClearPageMlocked(page)) {
131 unsigned long flags;
132
133 local_irq_save(flags);
134 __dec_zone_page_state(page, NR_MLOCK);
135 SetPageMlocked(newpage);
136 __inc_zone_page_state(newpage, NR_MLOCK);
137 local_irq_restore(flags);
138 }
139}
140
141#ifdef CONFIG_TRANSPARENT_HUGEPAGE
142extern unsigned long vma_address(struct page *page,
143 struct vm_area_struct *vma);
144#endif
145#else /* !CONFIG_MMU */
146static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
147{
148 return 0;
149}
150static inline void clear_page_mlock(struct page *page) { }
151static inline void mlock_vma_page(struct page *page) { }
152static inline void mlock_migrate_page(struct page *new, struct page *old) { }
153
154#endif /* !CONFIG_MMU */
155
156/*
157 * Return the mem_map entry representing the 'offset' subpage within
158 * the maximally aligned gigantic page 'base'. Handle any discontiguity
159 * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
160 */
161static inline struct page *mem_map_offset(struct page *base, int offset)
162{
163 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
164 return pfn_to_page(page_to_pfn(base) + offset);
165 return base + offset;
166}
167
168/*
169 * Iterator over all subpages within the maximally aligned gigantic
170 * page 'base'. Handle any discontiguity in the mem_map.
171 */
172static inline struct page *mem_map_next(struct page *iter,
173 struct page *base, int offset)
174{
175 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
176 unsigned long pfn = page_to_pfn(base) + offset;
177 if (!pfn_valid(pfn))
178 return NULL;
179 return pfn_to_page(pfn);
180 }
181 return iter + 1;
182}
183
184/*
185 * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
186 * so all functions starting at paging_init should be marked __init
187 * in those cases. SPARSEMEM, however, allows for memory hotplug,
188 * and alloc_bootmem_node is not used.
189 */
190#ifdef CONFIG_SPARSEMEM
191#define __paginginit __meminit
192#else
193#define __paginginit __init
194#endif
195
196/* Memory initialisation debug and verification */
197enum mminit_level {
198 MMINIT_WARNING,
199 MMINIT_VERIFY,
200 MMINIT_TRACE
201};
202
203#ifdef CONFIG_DEBUG_MEMORY_INIT
204
205extern int mminit_loglevel;
206
207#define mminit_dprintk(level, prefix, fmt, arg...) \
208do { \
209 if (level < mminit_loglevel) { \
210 printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
211 printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
212 } \
213} while (0)
214
215extern void mminit_verify_pageflags_layout(void);
216extern void mminit_verify_page_links(struct page *page,
217 enum zone_type zone, unsigned long nid, unsigned long pfn);
218extern void mminit_verify_zonelist(void);
219
220#else
221
222static inline void mminit_dprintk(enum mminit_level level,
223 const char *prefix, const char *fmt, ...)
224{
225}
226
227static inline void mminit_verify_pageflags_layout(void)
228{
229}
230
231static inline void mminit_verify_page_links(struct page *page,
232 enum zone_type zone, unsigned long nid, unsigned long pfn)
233{
234}
235
236static inline void mminit_verify_zonelist(void)
237{
238}
239#endif /* CONFIG_DEBUG_MEMORY_INIT */
240
241/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
242#if defined(CONFIG_SPARSEMEM)
243extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
244 unsigned long *end_pfn);
245#else
246static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
247 unsigned long *end_pfn)
248{
249}
250#endif /* CONFIG_SPARSEMEM */
251
252#define ZONE_RECLAIM_NOSCAN -2
253#define ZONE_RECLAIM_FULL -1
254#define ZONE_RECLAIM_SOME 0
255#define ZONE_RECLAIM_SUCCESS 1
256#endif
257
258extern int hwpoison_filter(struct page *p);
259
260extern u32 hwpoison_filter_dev_major;
261extern u32 hwpoison_filter_dev_minor;
262extern u64 hwpoison_filter_flags_mask;
263extern u64 hwpoison_filter_flags_value;
264extern u64 hwpoison_filter_memcg;
265extern u32 hwpoison_filter_enable;
1/* internal.h: mm/ internal definitions
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#ifndef __MM_INTERNAL_H
12#define __MM_INTERNAL_H
13
14#include <linux/fs.h>
15#include <linux/mm.h>
16#include <linux/pagemap.h>
17#include <linux/tracepoint-defs.h>
18
19/*
20 * The set of flags that only affect watermark checking and reclaim
21 * behaviour. This is used by the MM to obey the caller constraints
22 * about IO, FS and watermark checking while ignoring placement
23 * hints such as HIGHMEM usage.
24 */
25#define GFP_RECLAIM_MASK (__GFP_RECLAIM|__GFP_HIGH|__GFP_IO|__GFP_FS|\
26 __GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\
27 __GFP_NORETRY|__GFP_MEMALLOC|__GFP_NOMEMALLOC|\
28 __GFP_ATOMIC)
29
30/* The GFP flags allowed during early boot */
31#define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
32
33/* Control allocation cpuset and node placement constraints */
34#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
35
36/* Do not use these with a slab allocator */
37#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
38
39void page_writeback_init(void);
40
41int do_swap_page(struct vm_fault *vmf);
42
43void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
44 unsigned long floor, unsigned long ceiling);
45
46void unmap_page_range(struct mmu_gather *tlb,
47 struct vm_area_struct *vma,
48 unsigned long addr, unsigned long end,
49 struct zap_details *details);
50
51extern int __do_page_cache_readahead(struct address_space *mapping,
52 struct file *filp, pgoff_t offset, unsigned long nr_to_read,
53 unsigned long lookahead_size);
54
55/*
56 * Submit IO for the read-ahead request in file_ra_state.
57 */
58static inline unsigned long ra_submit(struct file_ra_state *ra,
59 struct address_space *mapping, struct file *filp)
60{
61 return __do_page_cache_readahead(mapping, filp,
62 ra->start, ra->size, ra->async_size);
63}
64
65/*
66 * Turn a non-refcounted page (->_refcount == 0) into refcounted with
67 * a count of one.
68 */
69static inline void set_page_refcounted(struct page *page)
70{
71 VM_BUG_ON_PAGE(PageTail(page), page);
72 VM_BUG_ON_PAGE(page_ref_count(page), page);
73 set_page_count(page, 1);
74}
75
76extern unsigned long highest_memmap_pfn;
77
78/*
79 * in mm/vmscan.c:
80 */
81extern int isolate_lru_page(struct page *page);
82extern void putback_lru_page(struct page *page);
83extern bool pgdat_reclaimable(struct pglist_data *pgdat);
84
85/*
86 * in mm/rmap.c:
87 */
88extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
89
90/*
91 * in mm/page_alloc.c
92 */
93
94/*
95 * Structure for holding the mostly immutable allocation parameters passed
96 * between functions involved in allocations, including the alloc_pages*
97 * family of functions.
98 *
99 * nodemask, migratetype and high_zoneidx are initialized only once in
100 * __alloc_pages_nodemask() and then never change.
101 *
102 * zonelist, preferred_zone and classzone_idx are set first in
103 * __alloc_pages_nodemask() for the fast path, and might be later changed
104 * in __alloc_pages_slowpath(). All other functions pass the whole strucure
105 * by a const pointer.
106 */
107struct alloc_context {
108 struct zonelist *zonelist;
109 nodemask_t *nodemask;
110 struct zoneref *preferred_zoneref;
111 int migratetype;
112 enum zone_type high_zoneidx;
113 bool spread_dirty_pages;
114};
115
116#define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref)
117
118/*
119 * Locate the struct page for both the matching buddy in our
120 * pair (buddy1) and the combined O(n+1) page they form (page).
121 *
122 * 1) Any buddy B1 will have an order O twin B2 which satisfies
123 * the following equation:
124 * B2 = B1 ^ (1 << O)
125 * For example, if the starting buddy (buddy2) is #8 its order
126 * 1 buddy is #10:
127 * B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10
128 *
129 * 2) Any buddy B will have an order O+1 parent P which
130 * satisfies the following equation:
131 * P = B & ~(1 << O)
132 *
133 * Assumption: *_mem_map is contiguous at least up to MAX_ORDER
134 */
135static inline unsigned long
136__find_buddy_index(unsigned long page_idx, unsigned int order)
137{
138 return page_idx ^ (1 << order);
139}
140
141extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
142 unsigned long end_pfn, struct zone *zone);
143
144static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
145 unsigned long end_pfn, struct zone *zone)
146{
147 if (zone->contiguous)
148 return pfn_to_page(start_pfn);
149
150 return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
151}
152
153extern int __isolate_free_page(struct page *page, unsigned int order);
154extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
155 unsigned int order);
156extern void prep_compound_page(struct page *page, unsigned int order);
157extern void post_alloc_hook(struct page *page, unsigned int order,
158 gfp_t gfp_flags);
159extern int user_min_free_kbytes;
160
161#if defined CONFIG_COMPACTION || defined CONFIG_CMA
162
163/*
164 * in mm/compaction.c
165 */
166/*
167 * compact_control is used to track pages being migrated and the free pages
168 * they are being migrated to during memory compaction. The free_pfn starts
169 * at the end of a zone and migrate_pfn begins at the start. Movable pages
170 * are moved to the end of a zone during a compaction run and the run
171 * completes when free_pfn <= migrate_pfn
172 */
173struct compact_control {
174 struct list_head freepages; /* List of free pages to migrate to */
175 struct list_head migratepages; /* List of pages being migrated */
176 unsigned long nr_freepages; /* Number of isolated free pages */
177 unsigned long nr_migratepages; /* Number of pages to migrate */
178 unsigned long free_pfn; /* isolate_freepages search base */
179 unsigned long migrate_pfn; /* isolate_migratepages search base */
180 unsigned long last_migrated_pfn;/* Not yet flushed page being freed */
181 enum migrate_mode mode; /* Async or sync migration mode */
182 bool ignore_skip_hint; /* Scan blocks even if marked skip */
183 bool ignore_block_suitable; /* Scan blocks considered unsuitable */
184 bool direct_compaction; /* False from kcompactd or /proc/... */
185 bool whole_zone; /* Whole zone should/has been scanned */
186 int order; /* order a direct compactor needs */
187 const gfp_t gfp_mask; /* gfp mask of a direct compactor */
188 const unsigned int alloc_flags; /* alloc flags of a direct compactor */
189 const int classzone_idx; /* zone index of a direct compactor */
190 struct zone *zone;
191 bool contended; /* Signal lock or sched contention */
192};
193
194unsigned long
195isolate_freepages_range(struct compact_control *cc,
196 unsigned long start_pfn, unsigned long end_pfn);
197unsigned long
198isolate_migratepages_range(struct compact_control *cc,
199 unsigned long low_pfn, unsigned long end_pfn);
200int find_suitable_fallback(struct free_area *area, unsigned int order,
201 int migratetype, bool only_stealable, bool *can_steal);
202
203#endif
204
205/*
206 * This function returns the order of a free page in the buddy system. In
207 * general, page_zone(page)->lock must be held by the caller to prevent the
208 * page from being allocated in parallel and returning garbage as the order.
209 * If a caller does not hold page_zone(page)->lock, it must guarantee that the
210 * page cannot be allocated or merged in parallel. Alternatively, it must
211 * handle invalid values gracefully, and use page_order_unsafe() below.
212 */
213static inline unsigned int page_order(struct page *page)
214{
215 /* PageBuddy() must be checked by the caller */
216 return page_private(page);
217}
218
219/*
220 * Like page_order(), but for callers who cannot afford to hold the zone lock.
221 * PageBuddy() should be checked first by the caller to minimize race window,
222 * and invalid values must be handled gracefully.
223 *
224 * READ_ONCE is used so that if the caller assigns the result into a local
225 * variable and e.g. tests it for valid range before using, the compiler cannot
226 * decide to remove the variable and inline the page_private(page) multiple
227 * times, potentially observing different values in the tests and the actual
228 * use of the result.
229 */
230#define page_order_unsafe(page) READ_ONCE(page_private(page))
231
232static inline bool is_cow_mapping(vm_flags_t flags)
233{
234 return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
235}
236
237/*
238 * These three helpers classifies VMAs for virtual memory accounting.
239 */
240
241/*
242 * Executable code area - executable, not writable, not stack
243 */
244static inline bool is_exec_mapping(vm_flags_t flags)
245{
246 return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
247}
248
249/*
250 * Stack area - atomatically grows in one direction
251 *
252 * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
253 * do_mmap() forbids all other combinations.
254 */
255static inline bool is_stack_mapping(vm_flags_t flags)
256{
257 return (flags & VM_STACK) == VM_STACK;
258}
259
260/*
261 * Data area - private, writable, not stack
262 */
263static inline bool is_data_mapping(vm_flags_t flags)
264{
265 return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
266}
267
268/* mm/util.c */
269void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
270 struct vm_area_struct *prev, struct rb_node *rb_parent);
271
272#ifdef CONFIG_MMU
273extern long populate_vma_page_range(struct vm_area_struct *vma,
274 unsigned long start, unsigned long end, int *nonblocking);
275extern void munlock_vma_pages_range(struct vm_area_struct *vma,
276 unsigned long start, unsigned long end);
277static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
278{
279 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
280}
281
282/*
283 * must be called with vma's mmap_sem held for read or write, and page locked.
284 */
285extern void mlock_vma_page(struct page *page);
286extern unsigned int munlock_vma_page(struct page *page);
287
288/*
289 * Clear the page's PageMlocked(). This can be useful in a situation where
290 * we want to unconditionally remove a page from the pagecache -- e.g.,
291 * on truncation or freeing.
292 *
293 * It is legal to call this function for any page, mlocked or not.
294 * If called for a page that is still mapped by mlocked vmas, all we do
295 * is revert to lazy LRU behaviour -- semantics are not broken.
296 */
297extern void clear_page_mlock(struct page *page);
298
299/*
300 * mlock_migrate_page - called only from migrate_misplaced_transhuge_page()
301 * (because that does not go through the full procedure of migration ptes):
302 * to migrate the Mlocked page flag; update statistics.
303 */
304static inline void mlock_migrate_page(struct page *newpage, struct page *page)
305{
306 if (TestClearPageMlocked(page)) {
307 int nr_pages = hpage_nr_pages(page);
308
309 /* Holding pmd lock, no change in irq context: __mod is safe */
310 __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
311 SetPageMlocked(newpage);
312 __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
313 }
314}
315
316extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
317
318/*
319 * At what user virtual address is page expected in @vma?
320 */
321static inline unsigned long
322__vma_address(struct page *page, struct vm_area_struct *vma)
323{
324 pgoff_t pgoff = page_to_pgoff(page);
325 return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
326}
327
328static inline unsigned long
329vma_address(struct page *page, struct vm_area_struct *vma)
330{
331 unsigned long address = __vma_address(page, vma);
332
333 /* page should be within @vma mapping range */
334 VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
335
336 return address;
337}
338
339#else /* !CONFIG_MMU */
340static inline void clear_page_mlock(struct page *page) { }
341static inline void mlock_vma_page(struct page *page) { }
342static inline void mlock_migrate_page(struct page *new, struct page *old) { }
343
344#endif /* !CONFIG_MMU */
345
346/*
347 * Return the mem_map entry representing the 'offset' subpage within
348 * the maximally aligned gigantic page 'base'. Handle any discontiguity
349 * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
350 */
351static inline struct page *mem_map_offset(struct page *base, int offset)
352{
353 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
354 return nth_page(base, offset);
355 return base + offset;
356}
357
358/*
359 * Iterator over all subpages within the maximally aligned gigantic
360 * page 'base'. Handle any discontiguity in the mem_map.
361 */
362static inline struct page *mem_map_next(struct page *iter,
363 struct page *base, int offset)
364{
365 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
366 unsigned long pfn = page_to_pfn(base) + offset;
367 if (!pfn_valid(pfn))
368 return NULL;
369 return pfn_to_page(pfn);
370 }
371 return iter + 1;
372}
373
374/*
375 * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
376 * so all functions starting at paging_init should be marked __init
377 * in those cases. SPARSEMEM, however, allows for memory hotplug,
378 * and alloc_bootmem_node is not used.
379 */
380#ifdef CONFIG_SPARSEMEM
381#define __paginginit __meminit
382#else
383#define __paginginit __init
384#endif
385
386/* Memory initialisation debug and verification */
387enum mminit_level {
388 MMINIT_WARNING,
389 MMINIT_VERIFY,
390 MMINIT_TRACE
391};
392
393#ifdef CONFIG_DEBUG_MEMORY_INIT
394
395extern int mminit_loglevel;
396
397#define mminit_dprintk(level, prefix, fmt, arg...) \
398do { \
399 if (level < mminit_loglevel) { \
400 if (level <= MMINIT_WARNING) \
401 pr_warn("mminit::" prefix " " fmt, ##arg); \
402 else \
403 printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
404 } \
405} while (0)
406
407extern void mminit_verify_pageflags_layout(void);
408extern void mminit_verify_zonelist(void);
409#else
410
411static inline void mminit_dprintk(enum mminit_level level,
412 const char *prefix, const char *fmt, ...)
413{
414}
415
416static inline void mminit_verify_pageflags_layout(void)
417{
418}
419
420static inline void mminit_verify_zonelist(void)
421{
422}
423#endif /* CONFIG_DEBUG_MEMORY_INIT */
424
425/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
426#if defined(CONFIG_SPARSEMEM)
427extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
428 unsigned long *end_pfn);
429#else
430static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
431 unsigned long *end_pfn)
432{
433}
434#endif /* CONFIG_SPARSEMEM */
435
436#define NODE_RECLAIM_NOSCAN -2
437#define NODE_RECLAIM_FULL -1
438#define NODE_RECLAIM_SOME 0
439#define NODE_RECLAIM_SUCCESS 1
440
441extern int hwpoison_filter(struct page *p);
442
443extern u32 hwpoison_filter_dev_major;
444extern u32 hwpoison_filter_dev_minor;
445extern u64 hwpoison_filter_flags_mask;
446extern u64 hwpoison_filter_flags_value;
447extern u64 hwpoison_filter_memcg;
448extern u32 hwpoison_filter_enable;
449
450extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
451 unsigned long, unsigned long,
452 unsigned long, unsigned long);
453
454extern void set_pageblock_order(void);
455unsigned long reclaim_clean_pages_from_list(struct zone *zone,
456 struct list_head *page_list);
457/* The ALLOC_WMARK bits are used as an index to zone->watermark */
458#define ALLOC_WMARK_MIN WMARK_MIN
459#define ALLOC_WMARK_LOW WMARK_LOW
460#define ALLOC_WMARK_HIGH WMARK_HIGH
461#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
462
463/* Mask to get the watermark bits */
464#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
465
466#define ALLOC_HARDER 0x10 /* try to alloc harder */
467#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
468#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
469#define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
470
471enum ttu_flags;
472struct tlbflush_unmap_batch;
473
474#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
475void try_to_unmap_flush(void);
476void try_to_unmap_flush_dirty(void);
477#else
478static inline void try_to_unmap_flush(void)
479{
480}
481static inline void try_to_unmap_flush_dirty(void)
482{
483}
484
485#endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */
486
487extern const struct trace_print_flags pageflag_names[];
488extern const struct trace_print_flags vmaflag_names[];
489extern const struct trace_print_flags gfpflag_names[];
490
491#endif /* __MM_INTERNAL_H */