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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 : : static inline bool can_madv_lru_vma(struct vm_area_struct *vma)
43 : : {
44 : 18920 : 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 : : extern unsigned int __do_page_cache_readahead(struct address_space *mapping,
53 : : struct file *filp, pgoff_t offset, unsigned long nr_to_read,
54 : : unsigned long lookahead_size);
55 : :
56 : : /*
57 : : * Submit IO for the read-ahead request in file_ra_state.
58 : : */
59 : : static inline unsigned long ra_submit(struct file_ra_state *ra,
60 : : struct address_space *mapping, struct file *filp)
61 : : {
62 : 1315752 : return __do_page_cache_readahead(mapping, filp,
63 : 956536 : ra->start, ra->size, ra->async_size);
64 : : }
65 : :
66 : : /*
67 : : * Turn a non-refcounted page (->_refcount == 0) into refcounted with
68 : : * a count of one.
69 : : */
70 : : static inline void set_page_refcounted(struct page *page)
71 : : {
72 : : VM_BUG_ON_PAGE(PageTail(page), page);
73 : : VM_BUG_ON_PAGE(page_ref_count(page), page);
74 : : set_page_count(page, 1);
75 : : }
76 : :
77 : : extern unsigned long highest_memmap_pfn;
78 : :
79 : : /*
80 : : * Maximum number of reclaim retries without progress before the OOM
81 : : * killer is consider the only way forward.
82 : : */
83 : : #define MAX_RECLAIM_RETRIES 16
84 : :
85 : : /*
86 : : * in mm/vmscan.c:
87 : : */
88 : : extern int isolate_lru_page(struct page *page);
89 : : extern void putback_lru_page(struct page *page);
90 : :
91 : : /*
92 : : * in mm/rmap.c:
93 : : */
94 : : extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
95 : :
96 : : /*
97 : : * in mm/page_alloc.c
98 : : */
99 : :
100 : : /*
101 : : * Structure for holding the mostly immutable allocation parameters passed
102 : : * between functions involved in allocations, including the alloc_pages*
103 : : * family of functions.
104 : : *
105 : : * nodemask, migratetype and high_zoneidx are initialized only once in
106 : : * __alloc_pages_nodemask() and then never change.
107 : : *
108 : : * zonelist, preferred_zone and classzone_idx are set first in
109 : : * __alloc_pages_nodemask() for the fast path, and might be later changed
110 : : * in __alloc_pages_slowpath(). All other functions pass the whole strucure
111 : : * by a const pointer.
112 : : */
113 : : struct alloc_context {
114 : : struct zonelist *zonelist;
115 : : nodemask_t *nodemask;
116 : : struct zoneref *preferred_zoneref;
117 : : int migratetype;
118 : : enum zone_type high_zoneidx;
119 : : bool spread_dirty_pages;
120 : : };
121 : :
122 : : #define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref)
123 : :
124 : : /*
125 : : * Locate the struct page for both the matching buddy in our
126 : : * pair (buddy1) and the combined O(n+1) page they form (page).
127 : : *
128 : : * 1) Any buddy B1 will have an order O twin B2 which satisfies
129 : : * the following equation:
130 : : * B2 = B1 ^ (1 << O)
131 : : * For example, if the starting buddy (buddy2) is #8 its order
132 : : * 1 buddy is #10:
133 : : * B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10
134 : : *
135 : : * 2) Any buddy B will have an order O+1 parent P which
136 : : * satisfies the following equation:
137 : : * P = B & ~(1 << O)
138 : : *
139 : : * Assumption: *_mem_map is contiguous at least up to MAX_ORDER
140 : : */
141 : : static inline unsigned long
142 : : __find_buddy_pfn(unsigned long page_pfn, unsigned int order)
143 : : {
144 : 36705418 : return page_pfn ^ (1 << order);
145 : : }
146 : :
147 : : extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
148 : : unsigned long end_pfn, struct zone *zone);
149 : :
150 : 8080 : static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
151 : : unsigned long end_pfn, struct zone *zone)
152 : : {
153 [ + - ]: 8080 : if (zone->contiguous)
154 : 8080 : return pfn_to_page(start_pfn);
155 : :
156 : 0 : return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
157 : : }
158 : :
159 : : extern int __isolate_free_page(struct page *page, unsigned int order);
160 : : extern void memblock_free_pages(struct page *page, unsigned long pfn,
161 : : unsigned int order);
162 : : extern void __free_pages_core(struct page *page, unsigned int order);
163 : : extern void prep_compound_page(struct page *page, unsigned int order);
164 : : extern void post_alloc_hook(struct page *page, unsigned int order,
165 : : gfp_t gfp_flags);
166 : : extern int user_min_free_kbytes;
167 : :
168 : : #if defined CONFIG_COMPACTION || defined CONFIG_CMA
169 : :
170 : : /*
171 : : * in mm/compaction.c
172 : : */
173 : : /*
174 : : * compact_control is used to track pages being migrated and the free pages
175 : : * they are being migrated to during memory compaction. The free_pfn starts
176 : : * at the end of a zone and migrate_pfn begins at the start. Movable pages
177 : : * are moved to the end of a zone during a compaction run and the run
178 : : * completes when free_pfn <= migrate_pfn
179 : : */
180 : : struct compact_control {
181 : : struct list_head freepages; /* List of free pages to migrate to */
182 : : struct list_head migratepages; /* List of pages being migrated */
183 : : unsigned int nr_freepages; /* Number of isolated free pages */
184 : : unsigned int nr_migratepages; /* Number of pages to migrate */
185 : : unsigned long free_pfn; /* isolate_freepages search base */
186 : : unsigned long migrate_pfn; /* isolate_migratepages search base */
187 : : unsigned long fast_start_pfn; /* a pfn to start linear scan from */
188 : : struct zone *zone;
189 : : unsigned long total_migrate_scanned;
190 : : unsigned long total_free_scanned;
191 : : unsigned short fast_search_fail;/* failures to use free list searches */
192 : : short search_order; /* order to start a fast search at */
193 : : const gfp_t gfp_mask; /* gfp mask of a direct compactor */
194 : : int order; /* order a direct compactor needs */
195 : : int migratetype; /* migratetype of direct compactor */
196 : : const unsigned int alloc_flags; /* alloc flags of a direct compactor */
197 : : const int classzone_idx; /* zone index of a direct compactor */
198 : : enum migrate_mode mode; /* Async or sync migration mode */
199 : : bool ignore_skip_hint; /* Scan blocks even if marked skip */
200 : : bool no_set_skip_hint; /* Don't mark blocks for skipping */
201 : : bool ignore_block_suitable; /* Scan blocks considered unsuitable */
202 : : bool direct_compaction; /* False from kcompactd or /proc/... */
203 : : bool whole_zone; /* Whole zone should/has been scanned */
204 : : bool contended; /* Signal lock or sched contention */
205 : : bool rescan; /* Rescanning the same pageblock */
206 : : };
207 : :
208 : : /*
209 : : * Used in direct compaction when a page should be taken from the freelists
210 : : * immediately when one is created during the free path.
211 : : */
212 : : struct capture_control {
213 : : struct compact_control *cc;
214 : : struct page *page;
215 : : };
216 : :
217 : : unsigned long
218 : : isolate_freepages_range(struct compact_control *cc,
219 : : unsigned long start_pfn, unsigned long end_pfn);
220 : : unsigned long
221 : : isolate_migratepages_range(struct compact_control *cc,
222 : : unsigned long low_pfn, unsigned long end_pfn);
223 : : int find_suitable_fallback(struct free_area *area, unsigned int order,
224 : : int migratetype, bool only_stealable, bool *can_steal);
225 : :
226 : : #endif
227 : :
228 : : /*
229 : : * This function returns the order of a free page in the buddy system. In
230 : : * general, page_zone(page)->lock must be held by the caller to prevent the
231 : : * page from being allocated in parallel and returning garbage as the order.
232 : : * If a caller does not hold page_zone(page)->lock, it must guarantee that the
233 : : * page cannot be allocated or merged in parallel. Alternatively, it must
234 : : * handle invalid values gracefully, and use page_order_unsafe() below.
235 : : */
236 : : static inline unsigned int page_order(struct page *page)
237 : : {
238 : : /* PageBuddy() must be checked by the caller */
239 : 11605802 : return page_private(page);
240 : : }
241 : :
242 : : /*
243 : : * Like page_order(), but for callers who cannot afford to hold the zone lock.
244 : : * PageBuddy() should be checked first by the caller to minimize race window,
245 : : * and invalid values must be handled gracefully.
246 : : *
247 : : * READ_ONCE is used so that if the caller assigns the result into a local
248 : : * variable and e.g. tests it for valid range before using, the compiler cannot
249 : : * decide to remove the variable and inline the page_private(page) multiple
250 : : * times, potentially observing different values in the tests and the actual
251 : : * use of the result.
252 : : */
253 : : #define page_order_unsafe(page) READ_ONCE(page_private(page))
254 : :
255 : : static inline bool is_cow_mapping(vm_flags_t flags)
256 : : {
257 : 42618972 : return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
258 : : }
259 : :
260 : : /*
261 : : * These three helpers classifies VMAs for virtual memory accounting.
262 : : */
263 : :
264 : : /*
265 : : * Executable code area - executable, not writable, not stack
266 : : */
267 : : static inline bool is_exec_mapping(vm_flags_t flags)
268 : : {
269 : 28515666 : return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
270 : : }
271 : :
272 : : /*
273 : : * Stack area - atomatically grows in one direction
274 : : *
275 : : * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
276 : : * do_mmap() forbids all other combinations.
277 : : */
278 : : static inline bool is_stack_mapping(vm_flags_t flags)
279 : : {
280 : 18159098 : return (flags & VM_STACK) == VM_STACK;
281 : : }
282 : :
283 : : /*
284 : : * Data area - private, writable, not stack
285 : : */
286 : : static inline bool is_data_mapping(vm_flags_t flags)
287 : : {
288 : 28837158 : return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
289 : : }
290 : :
291 : : /* mm/util.c */
292 : : void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
293 : : struct vm_area_struct *prev, struct rb_node *rb_parent);
294 : :
295 : : #ifdef CONFIG_MMU
296 : : extern long populate_vma_page_range(struct vm_area_struct *vma,
297 : : unsigned long start, unsigned long end, int *nonblocking);
298 : : extern void munlock_vma_pages_range(struct vm_area_struct *vma,
299 : : unsigned long start, unsigned long end);
300 : : static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
301 : : {
302 : 808 : munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
303 : : }
304 : :
305 : : /*
306 : : * must be called with vma's mmap_sem held for read or write, and page locked.
307 : : */
308 : : extern void mlock_vma_page(struct page *page);
309 : : extern unsigned int munlock_vma_page(struct page *page);
310 : :
311 : : /*
312 : : * Clear the page's PageMlocked(). This can be useful in a situation where
313 : : * we want to unconditionally remove a page from the pagecache -- e.g.,
314 : : * on truncation or freeing.
315 : : *
316 : : * It is legal to call this function for any page, mlocked or not.
317 : : * If called for a page that is still mapped by mlocked vmas, all we do
318 : : * is revert to lazy LRU behaviour -- semantics are not broken.
319 : : */
320 : : extern void clear_page_mlock(struct page *page);
321 : :
322 : : /*
323 : : * mlock_migrate_page - called only from migrate_misplaced_transhuge_page()
324 : : * (because that does not go through the full procedure of migration ptes):
325 : : * to migrate the Mlocked page flag; update statistics.
326 : : */
327 : : static inline void mlock_migrate_page(struct page *newpage, struct page *page)
328 : : {
329 : : if (TestClearPageMlocked(page)) {
330 : : int nr_pages = hpage_nr_pages(page);
331 : :
332 : : /* Holding pmd lock, no change in irq context: __mod is safe */
333 : : __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
334 : : SetPageMlocked(newpage);
335 : : __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
336 : : }
337 : : }
338 : :
339 : : extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
340 : :
341 : : /*
342 : : * At what user virtual address is page expected in @vma?
343 : : */
344 : : static inline unsigned long
345 : : __vma_address(struct page *page, struct vm_area_struct *vma)
346 : : {
347 : : pgoff_t pgoff = page_to_pgoff(page);
348 : 0 : return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
349 : : }
350 : :
351 : : static inline unsigned long
352 : : vma_address(struct page *page, struct vm_area_struct *vma)
353 : : {
354 : : unsigned long start, end;
355 : :
356 : : start = __vma_address(page, vma);
357 : : end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1);
358 : :
359 : : /* page should be within @vma mapping range */
360 : : VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma);
361 : :
362 : 0 : return max(start, vma->vm_start);
363 : : }
364 : :
365 : 1200764 : static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,
366 : : struct file *fpin)
367 : : {
368 : 1200764 : int flags = vmf->flags;
369 : :
370 [ + + ]: 1200764 : if (fpin)
371 : : return fpin;
372 : :
373 : : /*
374 : : * FAULT_FLAG_RETRY_NOWAIT means we don't want to wait on page locks or
375 : : * anything, so we only pin the file and drop the mmap_sem if only
376 : : * FAULT_FLAG_ALLOW_RETRY is set.
377 : : */
378 [ + + ]: 838282 : if ((flags & (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_RETRY_NOWAIT)) ==
379 : : FAULT_FLAG_ALLOW_RETRY) {
380 : 838194 : fpin = get_file(vmf->vma->vm_file);
381 : 838158 : up_read(&vmf->vma->vm_mm->mmap_sem);
382 : : }
383 : 838264 : return fpin;
384 : : }
385 : :
386 : : #else /* !CONFIG_MMU */
387 : : static inline void clear_page_mlock(struct page *page) { }
388 : : static inline void mlock_vma_page(struct page *page) { }
389 : : static inline void mlock_migrate_page(struct page *new, struct page *old) { }
390 : :
391 : : #endif /* !CONFIG_MMU */
392 : :
393 : : /*
394 : : * Return the mem_map entry representing the 'offset' subpage within
395 : : * the maximally aligned gigantic page 'base'. Handle any discontiguity
396 : : * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
397 : : */
398 : : static inline struct page *mem_map_offset(struct page *base, int offset)
399 : : {
400 : : if (unlikely(offset >= MAX_ORDER_NR_PAGES))
401 : : return nth_page(base, offset);
402 : : return base + offset;
403 : : }
404 : :
405 : : /*
406 : : * Iterator over all subpages within the maximally aligned gigantic
407 : : * page 'base'. Handle any discontiguity in the mem_map.
408 : : */
409 : : static inline struct page *mem_map_next(struct page *iter,
410 : : struct page *base, int offset)
411 : : {
412 : : if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
413 : : unsigned long pfn = page_to_pfn(base) + offset;
414 : : if (!pfn_valid(pfn))
415 : : return NULL;
416 : : return pfn_to_page(pfn);
417 : : }
418 : : return iter + 1;
419 : : }
420 : :
421 : : /* Memory initialisation debug and verification */
422 : : enum mminit_level {
423 : : MMINIT_WARNING,
424 : : MMINIT_VERIFY,
425 : : MMINIT_TRACE
426 : : };
427 : :
428 : : #ifdef CONFIG_DEBUG_MEMORY_INIT
429 : :
430 : : extern int mminit_loglevel;
431 : :
432 : : #define mminit_dprintk(level, prefix, fmt, arg...) \
433 : : do { \
434 : : if (level < mminit_loglevel) { \
435 : : if (level <= MMINIT_WARNING) \
436 : : pr_warn("mminit::" prefix " " fmt, ##arg); \
437 : : else \
438 : : printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
439 : : } \
440 : : } while (0)
441 : :
442 : : extern void mminit_verify_pageflags_layout(void);
443 : : extern void mminit_verify_zonelist(void);
444 : : #else
445 : :
446 : : static inline void mminit_dprintk(enum mminit_level level,
447 : : const char *prefix, const char *fmt, ...)
448 : : {
449 : : }
450 : :
451 : : static inline void mminit_verify_pageflags_layout(void)
452 : : {
453 : : }
454 : :
455 : : static inline void mminit_verify_zonelist(void)
456 : : {
457 : : }
458 : : #endif /* CONFIG_DEBUG_MEMORY_INIT */
459 : :
460 : : /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
461 : : #if defined(CONFIG_SPARSEMEM)
462 : : extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
463 : : unsigned long *end_pfn);
464 : : #else
465 : : static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
466 : : unsigned long *end_pfn)
467 : : {
468 : : }
469 : : #endif /* CONFIG_SPARSEMEM */
470 : :
471 : : #define NODE_RECLAIM_NOSCAN -2
472 : : #define NODE_RECLAIM_FULL -1
473 : : #define NODE_RECLAIM_SOME 0
474 : : #define NODE_RECLAIM_SUCCESS 1
475 : :
476 : : #ifdef CONFIG_NUMA
477 : : extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int);
478 : : #else
479 : : static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask,
480 : : unsigned int order)
481 : : {
482 : : return NODE_RECLAIM_NOSCAN;
483 : : }
484 : : #endif
485 : :
486 : : extern int hwpoison_filter(struct page *p);
487 : :
488 : : extern u32 hwpoison_filter_dev_major;
489 : : extern u32 hwpoison_filter_dev_minor;
490 : : extern u64 hwpoison_filter_flags_mask;
491 : : extern u64 hwpoison_filter_flags_value;
492 : : extern u64 hwpoison_filter_memcg;
493 : : extern u32 hwpoison_filter_enable;
494 : :
495 : : extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
496 : : unsigned long, unsigned long,
497 : : unsigned long, unsigned long);
498 : :
499 : : extern void set_pageblock_order(void);
500 : : unsigned long reclaim_clean_pages_from_list(struct zone *zone,
501 : : struct list_head *page_list);
502 : : /* The ALLOC_WMARK bits are used as an index to zone->watermark */
503 : : #define ALLOC_WMARK_MIN WMARK_MIN
504 : : #define ALLOC_WMARK_LOW WMARK_LOW
505 : : #define ALLOC_WMARK_HIGH WMARK_HIGH
506 : : #define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
507 : :
508 : : /* Mask to get the watermark bits */
509 : : #define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
510 : :
511 : : /*
512 : : * Only MMU archs have async oom victim reclaim - aka oom_reaper so we
513 : : * cannot assume a reduced access to memory reserves is sufficient for
514 : : * !MMU
515 : : */
516 : : #ifdef CONFIG_MMU
517 : : #define ALLOC_OOM 0x08
518 : : #else
519 : : #define ALLOC_OOM ALLOC_NO_WATERMARKS
520 : : #endif
521 : :
522 : : #define ALLOC_HARDER 0x10 /* try to alloc harder */
523 : : #define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
524 : : #define ALLOC_CPUSET 0x40 /* check for correct cpuset */
525 : : #define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
526 : : #ifdef CONFIG_ZONE_DMA32
527 : : #define ALLOC_NOFRAGMENT 0x100 /* avoid mixing pageblock types */
528 : : #else
529 : : #define ALLOC_NOFRAGMENT 0x0
530 : : #endif
531 : : #define ALLOC_KSWAPD 0x200 /* allow waking of kswapd */
532 : :
533 : : enum ttu_flags;
534 : : struct tlbflush_unmap_batch;
535 : :
536 : :
537 : : /*
538 : : * only for MM internal work items which do not depend on
539 : : * any allocations or locks which might depend on allocations
540 : : */
541 : : extern struct workqueue_struct *mm_percpu_wq;
542 : :
543 : : #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
544 : : void try_to_unmap_flush(void);
545 : : void try_to_unmap_flush_dirty(void);
546 : : void flush_tlb_batched_pending(struct mm_struct *mm);
547 : : #else
548 : : static inline void try_to_unmap_flush(void)
549 : : {
550 : : }
551 : : static inline void try_to_unmap_flush_dirty(void)
552 : : {
553 : : }
554 : : static inline void flush_tlb_batched_pending(struct mm_struct *mm)
555 : : {
556 : : }
557 : : #endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */
558 : :
559 : : extern const struct trace_print_flags pageflag_names[];
560 : : extern const struct trace_print_flags vmaflag_names[];
561 : : extern const struct trace_print_flags gfpflag_names[];
562 : :
563 : : static inline bool is_migrate_highatomic(enum migratetype migratetype)
564 : : {
565 : : return migratetype == MIGRATE_HIGHATOMIC;
566 : : }
567 : :
568 : 0 : static inline bool is_migrate_highatomic_page(struct page *page)
569 : : {
570 : 0 : return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC;
571 : : }
572 : :
573 : : void setup_zone_pageset(struct zone *zone);
574 : : extern struct page *alloc_new_node_page(struct page *page, unsigned long node);
575 : : #endif /* __MM_INTERNAL_H */
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