Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0-or-later */
2 : /* internal.h: mm/ internal definitions
3 : *
4 : * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
5 : * Written by David Howells (dhowells@redhat.com)
6 : */
7 : #ifndef __MM_INTERNAL_H
8 : #define __MM_INTERNAL_H
9 :
10 : #include <linux/fs.h>
11 : #include <linux/mm.h>
12 : #include <linux/pagemap.h>
13 : #include <linux/tracepoint-defs.h>
14 :
15 : /*
16 : * The set of flags that only affect watermark checking and reclaim
17 : * behaviour. This is used by the MM to obey the caller constraints
18 : * about IO, FS and watermark checking while ignoring placement
19 : * hints such as HIGHMEM usage.
20 : */
21 : #define GFP_RECLAIM_MASK (__GFP_RECLAIM|__GFP_HIGH|__GFP_IO|__GFP_FS|\
22 : __GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NOFAIL|\
23 : __GFP_NORETRY|__GFP_MEMALLOC|__GFP_NOMEMALLOC|\
24 : __GFP_ATOMIC)
25 :
26 : /* The GFP flags allowed during early boot */
27 : #define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
28 :
29 : /* Control allocation cpuset and node placement constraints */
30 : #define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
31 :
32 : /* Do not use these with a slab allocator */
33 : #define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
34 :
35 : void page_writeback_init(void);
36 :
37 : vm_fault_t do_swap_page(struct vm_fault *vmf);
38 :
39 : void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
40 : unsigned long floor, unsigned long ceiling);
41 :
42 4 : static inline bool can_madv_lru_vma(struct vm_area_struct *vma)
43 : {
44 4 : return !(vma->vm_flags & (VM_LOCKED|VM_HUGETLB|VM_PFNMAP));
45 : }
46 :
47 : void unmap_page_range(struct mmu_gather *tlb,
48 : struct vm_area_struct *vma,
49 : unsigned long addr, unsigned long end,
50 : struct zap_details *details);
51 :
52 : void do_page_cache_ra(struct readahead_control *, unsigned long nr_to_read,
53 : unsigned long lookahead_size);
54 : void force_page_cache_ra(struct readahead_control *, struct file_ra_state *,
55 : unsigned long nr);
56 0 : static inline void force_page_cache_readahead(struct address_space *mapping,
57 : struct file *file, pgoff_t index, unsigned long nr_to_read)
58 : {
59 0 : DEFINE_READAHEAD(ractl, file, mapping, index);
60 0 : force_page_cache_ra(&ractl, &file->f_ra, nr_to_read);
61 0 : }
62 :
63 : unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
64 : pgoff_t end, struct pagevec *pvec, pgoff_t *indices);
65 :
66 : /**
67 : * page_evictable - test whether a page is evictable
68 : * @page: the page to test
69 : *
70 : * Test whether page is evictable--i.e., should be placed on active/inactive
71 : * lists vs unevictable list.
72 : *
73 : * Reasons page might not be evictable:
74 : * (1) page's mapping marked unevictable
75 : * (2) page is part of an mlocked VMA
76 : *
77 : */
78 96343 : static inline bool page_evictable(struct page *page)
79 : {
80 96343 : bool ret;
81 :
82 : /* Prevent address_space of inode and swap cache from being freed */
83 96343 : rcu_read_lock();
84 192686 : ret = !mapping_unevictable(page_mapping(page)) && !PageMlocked(page);
85 96343 : rcu_read_unlock();
86 96343 : return ret;
87 : }
88 :
89 : /*
90 : * Turn a non-refcounted page (->_refcount == 0) into refcounted with
91 : * a count of one.
92 : */
93 193500 : static inline void set_page_refcounted(struct page *page)
94 : {
95 193500 : VM_BUG_ON_PAGE(PageTail(page), page);
96 193500 : VM_BUG_ON_PAGE(page_ref_count(page), page);
97 193498 : set_page_count(page, 1);
98 193501 : }
99 :
100 : extern unsigned long highest_memmap_pfn;
101 :
102 : /*
103 : * Maximum number of reclaim retries without progress before the OOM
104 : * killer is consider the only way forward.
105 : */
106 : #define MAX_RECLAIM_RETRIES 16
107 :
108 : /*
109 : * in mm/vmscan.c:
110 : */
111 : extern int isolate_lru_page(struct page *page);
112 : extern void putback_lru_page(struct page *page);
113 :
114 : /*
115 : * in mm/rmap.c:
116 : */
117 : extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
118 :
119 : /*
120 : * in mm/page_alloc.c
121 : */
122 :
123 : /*
124 : * Structure for holding the mostly immutable allocation parameters passed
125 : * between functions involved in allocations, including the alloc_pages*
126 : * family of functions.
127 : *
128 : * nodemask, migratetype and highest_zoneidx are initialized only once in
129 : * __alloc_pages_nodemask() and then never change.
130 : *
131 : * zonelist, preferred_zone and highest_zoneidx are set first in
132 : * __alloc_pages_nodemask() for the fast path, and might be later changed
133 : * in __alloc_pages_slowpath(). All other functions pass the whole structure
134 : * by a const pointer.
135 : */
136 : struct alloc_context {
137 : struct zonelist *zonelist;
138 : nodemask_t *nodemask;
139 : struct zoneref *preferred_zoneref;
140 : int migratetype;
141 :
142 : /*
143 : * highest_zoneidx represents highest usable zone index of
144 : * the allocation request. Due to the nature of the zone,
145 : * memory on lower zone than the highest_zoneidx will be
146 : * protected by lowmem_reserve[highest_zoneidx].
147 : *
148 : * highest_zoneidx is also used by reclaim/compaction to limit
149 : * the target zone since higher zone than this index cannot be
150 : * usable for this allocation request.
151 : */
152 : enum zone_type highest_zoneidx;
153 : bool spread_dirty_pages;
154 : };
155 :
156 : /*
157 : * Locate the struct page for both the matching buddy in our
158 : * pair (buddy1) and the combined O(n+1) page they form (page).
159 : *
160 : * 1) Any buddy B1 will have an order O twin B2 which satisfies
161 : * the following equation:
162 : * B2 = B1 ^ (1 << O)
163 : * For example, if the starting buddy (buddy2) is #8 its order
164 : * 1 buddy is #10:
165 : * B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10
166 : *
167 : * 2) Any buddy B will have an order O+1 parent P which
168 : * satisfies the following equation:
169 : * P = B & ~(1 << O)
170 : *
171 : * Assumption: *_mem_map is contiguous at least up to MAX_ORDER
172 : */
173 : static inline unsigned long
174 110956 : __find_buddy_pfn(unsigned long page_pfn, unsigned int order)
175 : {
176 110956 : return page_pfn ^ (1 << order);
177 : }
178 :
179 : extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
180 : unsigned long end_pfn, struct zone *zone);
181 :
182 0 : static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
183 : unsigned long end_pfn, struct zone *zone)
184 : {
185 0 : if (zone->contiguous)
186 0 : return pfn_to_page(start_pfn);
187 :
188 0 : return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
189 : }
190 :
191 : extern int __isolate_free_page(struct page *page, unsigned int order);
192 : extern void __putback_isolated_page(struct page *page, unsigned int order,
193 : int mt);
194 : extern void memblock_free_pages(struct page *page, unsigned long pfn,
195 : unsigned int order);
196 : extern void __free_pages_core(struct page *page, unsigned int order);
197 : extern void prep_compound_page(struct page *page, unsigned int order);
198 : extern void post_alloc_hook(struct page *page, unsigned int order,
199 : gfp_t gfp_flags);
200 : extern int user_min_free_kbytes;
201 :
202 : extern void free_unref_page(struct page *page);
203 : extern void free_unref_page_list(struct list_head *list);
204 :
205 : extern void zone_pcp_update(struct zone *zone);
206 : extern void zone_pcp_reset(struct zone *zone);
207 : extern void zone_pcp_disable(struct zone *zone);
208 : extern void zone_pcp_enable(struct zone *zone);
209 :
210 : #if defined CONFIG_COMPACTION || defined CONFIG_CMA
211 :
212 : /*
213 : * in mm/compaction.c
214 : */
215 : /*
216 : * compact_control is used to track pages being migrated and the free pages
217 : * they are being migrated to during memory compaction. The free_pfn starts
218 : * at the end of a zone and migrate_pfn begins at the start. Movable pages
219 : * are moved to the end of a zone during a compaction run and the run
220 : * completes when free_pfn <= migrate_pfn
221 : */
222 : struct compact_control {
223 : struct list_head freepages; /* List of free pages to migrate to */
224 : struct list_head migratepages; /* List of pages being migrated */
225 : unsigned int nr_freepages; /* Number of isolated free pages */
226 : unsigned int nr_migratepages; /* Number of pages to migrate */
227 : unsigned long free_pfn; /* isolate_freepages search base */
228 : unsigned long migrate_pfn; /* isolate_migratepages search base */
229 : unsigned long fast_start_pfn; /* a pfn to start linear scan from */
230 : struct zone *zone;
231 : unsigned long total_migrate_scanned;
232 : unsigned long total_free_scanned;
233 : unsigned short fast_search_fail;/* failures to use free list searches */
234 : short search_order; /* order to start a fast search at */
235 : const gfp_t gfp_mask; /* gfp mask of a direct compactor */
236 : int order; /* order a direct compactor needs */
237 : int migratetype; /* migratetype of direct compactor */
238 : const unsigned int alloc_flags; /* alloc flags of a direct compactor */
239 : const int highest_zoneidx; /* zone index of a direct compactor */
240 : enum migrate_mode mode; /* Async or sync migration mode */
241 : bool ignore_skip_hint; /* Scan blocks even if marked skip */
242 : bool no_set_skip_hint; /* Don't mark blocks for skipping */
243 : bool ignore_block_suitable; /* Scan blocks considered unsuitable */
244 : bool direct_compaction; /* False from kcompactd or /proc/... */
245 : bool proactive_compaction; /* kcompactd proactive compaction */
246 : bool whole_zone; /* Whole zone should/has been scanned */
247 : bool contended; /* Signal lock or sched contention */
248 : bool rescan; /* Rescanning the same pageblock */
249 : bool alloc_contig; /* alloc_contig_range allocation */
250 : };
251 :
252 : /*
253 : * Used in direct compaction when a page should be taken from the freelists
254 : * immediately when one is created during the free path.
255 : */
256 : struct capture_control {
257 : struct compact_control *cc;
258 : struct page *page;
259 : };
260 :
261 : unsigned long
262 : isolate_freepages_range(struct compact_control *cc,
263 : unsigned long start_pfn, unsigned long end_pfn);
264 : unsigned long
265 : isolate_migratepages_range(struct compact_control *cc,
266 : unsigned long low_pfn, unsigned long end_pfn);
267 : int find_suitable_fallback(struct free_area *area, unsigned int order,
268 : int migratetype, bool only_stealable, bool *can_steal);
269 :
270 : #endif
271 :
272 : /*
273 : * This function returns the order of a free page in the buddy system. In
274 : * general, page_zone(page)->lock must be held by the caller to prevent the
275 : * page from being allocated in parallel and returning garbage as the order.
276 : * If a caller does not hold page_zone(page)->lock, it must guarantee that the
277 : * page cannot be allocated or merged in parallel. Alternatively, it must
278 : * handle invalid values gracefully, and use buddy_order_unsafe() below.
279 : */
280 22806 : static inline unsigned int buddy_order(struct page *page)
281 : {
282 : /* PageBuddy() must be checked by the caller */
283 22806 : return page_private(page);
284 : }
285 :
286 : /*
287 : * Like buddy_order(), but for callers who cannot afford to hold the zone lock.
288 : * PageBuddy() should be checked first by the caller to minimize race window,
289 : * and invalid values must be handled gracefully.
290 : *
291 : * READ_ONCE is used so that if the caller assigns the result into a local
292 : * variable and e.g. tests it for valid range before using, the compiler cannot
293 : * decide to remove the variable and inline the page_private(page) multiple
294 : * times, potentially observing different values in the tests and the actual
295 : * use of the result.
296 : */
297 : #define buddy_order_unsafe(page) READ_ONCE(page_private(page))
298 :
299 : /*
300 : * These three helpers classifies VMAs for virtual memory accounting.
301 : */
302 :
303 : /*
304 : * Executable code area - executable, not writable, not stack
305 : */
306 64434 : static inline bool is_exec_mapping(vm_flags_t flags)
307 : {
308 64434 : return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
309 : }
310 :
311 : /*
312 : * Stack area - atomatically grows in one direction
313 : *
314 : * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
315 : * do_mmap() forbids all other combinations.
316 : */
317 56419 : static inline bool is_stack_mapping(vm_flags_t flags)
318 : {
319 56419 : return (flags & VM_STACK) == VM_STACK;
320 : }
321 :
322 : /*
323 : * Data area - private, writable, not stack
324 : */
325 87718 : static inline bool is_data_mapping(vm_flags_t flags)
326 : {
327 87718 : return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
328 : }
329 :
330 : /* mm/util.c */
331 : void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
332 : struct vm_area_struct *prev);
333 : void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma);
334 :
335 : #ifdef CONFIG_MMU
336 : extern long populate_vma_page_range(struct vm_area_struct *vma,
337 : unsigned long start, unsigned long end, int *nonblocking);
338 : extern void munlock_vma_pages_range(struct vm_area_struct *vma,
339 : unsigned long start, unsigned long end);
340 1 : static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
341 : {
342 1 : munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
343 1 : }
344 :
345 : /*
346 : * must be called with vma's mmap_lock held for read or write, and page locked.
347 : */
348 : extern void mlock_vma_page(struct page *page);
349 : extern unsigned int munlock_vma_page(struct page *page);
350 :
351 : /*
352 : * Clear the page's PageMlocked(). This can be useful in a situation where
353 : * we want to unconditionally remove a page from the pagecache -- e.g.,
354 : * on truncation or freeing.
355 : *
356 : * It is legal to call this function for any page, mlocked or not.
357 : * If called for a page that is still mapped by mlocked vmas, all we do
358 : * is revert to lazy LRU behaviour -- semantics are not broken.
359 : */
360 : extern void clear_page_mlock(struct page *page);
361 :
362 : /*
363 : * mlock_migrate_page - called only from migrate_misplaced_transhuge_page()
364 : * (because that does not go through the full procedure of migration ptes):
365 : * to migrate the Mlocked page flag; update statistics.
366 : */
367 : static inline void mlock_migrate_page(struct page *newpage, struct page *page)
368 : {
369 : if (TestClearPageMlocked(page)) {
370 : int nr_pages = thp_nr_pages(page);
371 :
372 : /* Holding pmd lock, no change in irq context: __mod is safe */
373 : __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
374 : SetPageMlocked(newpage);
375 : __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
376 : }
377 : }
378 :
379 : extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
380 :
381 : /*
382 : * At what user virtual address is page expected in @vma?
383 : */
384 : static inline unsigned long
385 68 : __vma_address(struct page *page, struct vm_area_struct *vma)
386 : {
387 0 : pgoff_t pgoff = page_to_pgoff(page);
388 0 : return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
389 : }
390 :
391 : static inline unsigned long
392 68 : vma_address(struct page *page, struct vm_area_struct *vma)
393 : {
394 68 : unsigned long start, end;
395 :
396 68 : start = __vma_address(page, vma);
397 68 : end = start + thp_size(page) - PAGE_SIZE;
398 :
399 : /* page should be within @vma mapping range */
400 68 : VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma);
401 :
402 68 : return max(start, vma->vm_start);
403 : }
404 :
405 307 : static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,
406 : struct file *fpin)
407 : {
408 307 : int flags = vmf->flags;
409 :
410 307 : if (fpin)
411 : return fpin;
412 :
413 : /*
414 : * FAULT_FLAG_RETRY_NOWAIT means we don't want to wait on page locks or
415 : * anything, so we only pin the file and drop the mmap_lock if only
416 : * FAULT_FLAG_ALLOW_RETRY is set, while this is the first attempt.
417 : */
418 307 : if (fault_flag_allow_retry_first(flags) &&
419 307 : !(flags & FAULT_FLAG_RETRY_NOWAIT)) {
420 307 : fpin = get_file(vmf->vma->vm_file);
421 307 : mmap_read_unlock(vmf->vma->vm_mm);
422 : }
423 : return fpin;
424 : }
425 :
426 : #else /* !CONFIG_MMU */
427 : static inline void clear_page_mlock(struct page *page) { }
428 : static inline void mlock_vma_page(struct page *page) { }
429 : static inline void mlock_migrate_page(struct page *new, struct page *old) { }
430 :
431 : #endif /* !CONFIG_MMU */
432 :
433 : /*
434 : * Return the mem_map entry representing the 'offset' subpage within
435 : * the maximally aligned gigantic page 'base'. Handle any discontiguity
436 : * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
437 : */
438 : static inline struct page *mem_map_offset(struct page *base, int offset)
439 : {
440 : if (unlikely(offset >= MAX_ORDER_NR_PAGES))
441 : return nth_page(base, offset);
442 : return base + offset;
443 : }
444 :
445 : /*
446 : * Iterator over all subpages within the maximally aligned gigantic
447 : * page 'base'. Handle any discontiguity in the mem_map.
448 : */
449 0 : static inline struct page *mem_map_next(struct page *iter,
450 : struct page *base, int offset)
451 : {
452 0 : if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
453 0 : unsigned long pfn = page_to_pfn(base) + offset;
454 0 : if (!pfn_valid(pfn))
455 : return NULL;
456 0 : return pfn_to_page(pfn);
457 : }
458 0 : return iter + 1;
459 : }
460 :
461 : /* Memory initialisation debug and verification */
462 : enum mminit_level {
463 : MMINIT_WARNING,
464 : MMINIT_VERIFY,
465 : MMINIT_TRACE
466 : };
467 :
468 : #ifdef CONFIG_DEBUG_MEMORY_INIT
469 :
470 : extern int mminit_loglevel;
471 :
472 : #define mminit_dprintk(level, prefix, fmt, arg...) \
473 : do { \
474 : if (level < mminit_loglevel) { \
475 : if (level <= MMINIT_WARNING) \
476 : pr_warn("mminit::" prefix " " fmt, ##arg); \
477 : else \
478 : printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
479 : } \
480 : } while (0)
481 :
482 : extern void mminit_verify_pageflags_layout(void);
483 : extern void mminit_verify_zonelist(void);
484 : #else
485 :
486 1 : static inline void mminit_dprintk(enum mminit_level level,
487 : const char *prefix, const char *fmt, ...)
488 : {
489 1 : }
490 :
491 1 : static inline void mminit_verify_pageflags_layout(void)
492 : {
493 1 : }
494 :
495 1 : static inline void mminit_verify_zonelist(void)
496 : {
497 1 : }
498 : #endif /* CONFIG_DEBUG_MEMORY_INIT */
499 :
500 : /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
501 : #if defined(CONFIG_SPARSEMEM)
502 : extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
503 : unsigned long *end_pfn);
504 : #else
505 : static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
506 : unsigned long *end_pfn)
507 : {
508 : }
509 : #endif /* CONFIG_SPARSEMEM */
510 :
511 : #define NODE_RECLAIM_NOSCAN -2
512 : #define NODE_RECLAIM_FULL -1
513 : #define NODE_RECLAIM_SOME 0
514 : #define NODE_RECLAIM_SUCCESS 1
515 :
516 : #ifdef CONFIG_NUMA
517 : extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int);
518 : #else
519 : static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask,
520 : unsigned int order)
521 : {
522 : return NODE_RECLAIM_NOSCAN;
523 : }
524 : #endif
525 :
526 : extern int hwpoison_filter(struct page *p);
527 :
528 : extern u32 hwpoison_filter_dev_major;
529 : extern u32 hwpoison_filter_dev_minor;
530 : extern u64 hwpoison_filter_flags_mask;
531 : extern u64 hwpoison_filter_flags_value;
532 : extern u64 hwpoison_filter_memcg;
533 : extern u32 hwpoison_filter_enable;
534 :
535 : extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
536 : unsigned long, unsigned long,
537 : unsigned long, unsigned long);
538 :
539 : extern void set_pageblock_order(void);
540 : unsigned int reclaim_clean_pages_from_list(struct zone *zone,
541 : struct list_head *page_list);
542 : /* The ALLOC_WMARK bits are used as an index to zone->watermark */
543 : #define ALLOC_WMARK_MIN WMARK_MIN
544 : #define ALLOC_WMARK_LOW WMARK_LOW
545 : #define ALLOC_WMARK_HIGH WMARK_HIGH
546 : #define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
547 :
548 : /* Mask to get the watermark bits */
549 : #define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
550 :
551 : /*
552 : * Only MMU archs have async oom victim reclaim - aka oom_reaper so we
553 : * cannot assume a reduced access to memory reserves is sufficient for
554 : * !MMU
555 : */
556 : #ifdef CONFIG_MMU
557 : #define ALLOC_OOM 0x08
558 : #else
559 : #define ALLOC_OOM ALLOC_NO_WATERMARKS
560 : #endif
561 :
562 : #define ALLOC_HARDER 0x10 /* try to alloc harder */
563 : #define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
564 : #define ALLOC_CPUSET 0x40 /* check for correct cpuset */
565 : #define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
566 : #ifdef CONFIG_ZONE_DMA32
567 : #define ALLOC_NOFRAGMENT 0x100 /* avoid mixing pageblock types */
568 : #else
569 : #define ALLOC_NOFRAGMENT 0x0
570 : #endif
571 : #define ALLOC_KSWAPD 0x800 /* allow waking of kswapd, __GFP_KSWAPD_RECLAIM set */
572 :
573 : enum ttu_flags;
574 : struct tlbflush_unmap_batch;
575 :
576 :
577 : /*
578 : * only for MM internal work items which do not depend on
579 : * any allocations or locks which might depend on allocations
580 : */
581 : extern struct workqueue_struct *mm_percpu_wq;
582 :
583 : #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
584 : void try_to_unmap_flush(void);
585 : void try_to_unmap_flush_dirty(void);
586 : void flush_tlb_batched_pending(struct mm_struct *mm);
587 : #else
588 : static inline void try_to_unmap_flush(void)
589 : {
590 : }
591 : static inline void try_to_unmap_flush_dirty(void)
592 : {
593 : }
594 : static inline void flush_tlb_batched_pending(struct mm_struct *mm)
595 : {
596 : }
597 : #endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */
598 :
599 : extern const struct trace_print_flags pageflag_names[];
600 : extern const struct trace_print_flags vmaflag_names[];
601 : extern const struct trace_print_flags gfpflag_names[];
602 :
603 38 : static inline bool is_migrate_highatomic(enum migratetype migratetype)
604 : {
605 38 : return migratetype == MIGRATE_HIGHATOMIC;
606 : }
607 :
608 0 : static inline bool is_migrate_highatomic_page(struct page *page)
609 : {
610 0 : return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC;
611 : }
612 :
613 : void setup_zone_pageset(struct zone *zone);
614 :
615 : struct migration_target_control {
616 : int nid; /* preferred node id */
617 : nodemask_t *nmask;
618 : gfp_t gfp_mask;
619 : };
620 :
621 : #endif /* __MM_INTERNAL_H */
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