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
can_madv_lru_vma(struct vm_area_struct * vma)42 static inline bool can_madv_lru_vma(struct vm_area_struct *vma)
43 {
44 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);
force_page_cache_readahead(struct address_space * mapping,struct file * file,pgoff_t index,unsigned long nr_to_read)56 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 DEFINE_READAHEAD(ractl, file, mapping, index);
60 force_page_cache_ra(&ractl, &file->f_ra, nr_to_read);
61 }
62
63 struct page *find_get_entry(struct address_space *mapping, pgoff_t index);
64 struct page *find_lock_entry(struct address_space *mapping, pgoff_t index);
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 */
page_evictable(struct page * page)78 static inline bool page_evictable(struct page *page)
79 {
80 bool ret;
81
82 /* Prevent address_space of inode and swap cache from being freed */
83 rcu_read_lock();
84 ret = !mapping_unevictable(page_mapping(page)) && !PageMlocked(page);
85 rcu_read_unlock();
86 return ret;
87 }
88
89 /*
90 * Turn a non-refcounted page (->_refcount == 0) into refcounted with
91 * a count of one.
92 */
set_page_refcounted(struct page * page)93 static inline void set_page_refcounted(struct page *page)
94 {
95 VM_BUG_ON_PAGE(PageTail(page), page);
96 VM_BUG_ON_PAGE(page_ref_count(page), page);
97 set_page_count(page, 1);
98 }
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
__find_buddy_pfn(unsigned long page_pfn,unsigned int order)174 __find_buddy_pfn(unsigned long page_pfn, unsigned int order)
175 {
176 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
pageblock_pfn_to_page(unsigned long start_pfn,unsigned long end_pfn,struct zone * zone)182 static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
183 unsigned long end_pfn, struct zone *zone)
184 {
185 if (zone->contiguous)
186 return pfn_to_page(start_pfn);
187
188 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 zone_pcp_update(struct zone *zone);
203 extern void zone_pcp_reset(struct zone *zone);
204
205 #if defined CONFIG_COMPACTION || defined CONFIG_CMA
206
207 /*
208 * in mm/compaction.c
209 */
210 /*
211 * compact_control is used to track pages being migrated and the free pages
212 * they are being migrated to during memory compaction. The free_pfn starts
213 * at the end of a zone and migrate_pfn begins at the start. Movable pages
214 * are moved to the end of a zone during a compaction run and the run
215 * completes when free_pfn <= migrate_pfn
216 */
217 struct compact_control {
218 struct list_head freepages; /* List of free pages to migrate to */
219 struct list_head migratepages; /* List of pages being migrated */
220 unsigned int nr_freepages; /* Number of isolated free pages */
221 unsigned int nr_migratepages; /* Number of pages to migrate */
222 unsigned long free_pfn; /* isolate_freepages search base */
223 unsigned long migrate_pfn; /* isolate_migratepages search base */
224 unsigned long fast_start_pfn; /* a pfn to start linear scan from */
225 struct zone *zone;
226 unsigned long total_migrate_scanned;
227 unsigned long total_free_scanned;
228 unsigned short fast_search_fail;/* failures to use free list searches */
229 short search_order; /* order to start a fast search at */
230 const gfp_t gfp_mask; /* gfp mask of a direct compactor */
231 int order; /* order a direct compactor needs */
232 int migratetype; /* migratetype of direct compactor */
233 const unsigned int alloc_flags; /* alloc flags of a direct compactor */
234 const int highest_zoneidx; /* zone index of a direct compactor */
235 enum migrate_mode mode; /* Async or sync migration mode */
236 bool ignore_skip_hint; /* Scan blocks even if marked skip */
237 bool no_set_skip_hint; /* Don't mark blocks for skipping */
238 bool ignore_block_suitable; /* Scan blocks considered unsuitable */
239 bool direct_compaction; /* False from kcompactd or /proc/... */
240 bool proactive_compaction; /* kcompactd proactive compaction */
241 bool whole_zone; /* Whole zone should/has been scanned */
242 bool contended; /* Signal lock or sched contention */
243 bool rescan; /* Rescanning the same pageblock */
244 bool alloc_contig; /* alloc_contig_range allocation */
245 };
246
247 /*
248 * Used in direct compaction when a page should be taken from the freelists
249 * immediately when one is created during the free path.
250 */
251 struct capture_control {
252 struct compact_control *cc;
253 struct page *page;
254 };
255
256 unsigned long
257 isolate_freepages_range(struct compact_control *cc,
258 unsigned long start_pfn, unsigned long end_pfn);
259 unsigned long
260 isolate_migratepages_range(struct compact_control *cc,
261 unsigned long low_pfn, unsigned long end_pfn);
262 int find_suitable_fallback(struct free_area *area, unsigned int order,
263 int migratetype, bool only_stealable, bool *can_steal);
264
265 #endif
266
267 /*
268 * This function returns the order of a free page in the buddy system. In
269 * general, page_zone(page)->lock must be held by the caller to prevent the
270 * page from being allocated in parallel and returning garbage as the order.
271 * If a caller does not hold page_zone(page)->lock, it must guarantee that the
272 * page cannot be allocated or merged in parallel. Alternatively, it must
273 * handle invalid values gracefully, and use buddy_order_unsafe() below.
274 */
buddy_order(struct page * page)275 static inline unsigned int buddy_order(struct page *page)
276 {
277 /* PageBuddy() must be checked by the caller */
278 return page_private(page);
279 }
280
281 /*
282 * Like buddy_order(), but for callers who cannot afford to hold the zone lock.
283 * PageBuddy() should be checked first by the caller to minimize race window,
284 * and invalid values must be handled gracefully.
285 *
286 * READ_ONCE is used so that if the caller assigns the result into a local
287 * variable and e.g. tests it for valid range before using, the compiler cannot
288 * decide to remove the variable and inline the page_private(page) multiple
289 * times, potentially observing different values in the tests and the actual
290 * use of the result.
291 */
292 #define buddy_order_unsafe(page) READ_ONCE(page_private(page))
293
is_cow_mapping(vm_flags_t flags)294 static inline bool is_cow_mapping(vm_flags_t flags)
295 {
296 return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
297 }
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 */
is_exec_mapping(vm_flags_t flags)306 static inline bool is_exec_mapping(vm_flags_t flags)
307 {
308 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 */
is_stack_mapping(vm_flags_t flags)317 static inline bool is_stack_mapping(vm_flags_t flags)
318 {
319 return (flags & VM_STACK) == VM_STACK;
320 }
321
322 /*
323 * Data area - private, writable, not stack
324 */
is_data_mapping(vm_flags_t flags)325 static inline bool is_data_mapping(vm_flags_t flags)
326 {
327 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);
munlock_vma_pages_all(struct vm_area_struct * vma)340 static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
341 {
342 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
343 }
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 */
mlock_migrate_page(struct page * newpage,struct page * page)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
__vma_address(struct page * page,struct vm_area_struct * vma)385 __vma_address(struct page *page, struct vm_area_struct *vma)
386 {
387 pgoff_t pgoff = page_to_pgoff(page);
388 return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
389 }
390
391 static inline unsigned long
vma_address(struct page * page,struct vm_area_struct * vma)392 vma_address(struct page *page, struct vm_area_struct *vma)
393 {
394 unsigned long start, end;
395
396 start = __vma_address(page, vma);
397 end = start + thp_size(page) - PAGE_SIZE;
398
399 /* page should be within @vma mapping range */
400 VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma);
401
402 return max(start, vma->vm_start);
403 }
404
maybe_unlock_mmap_for_io(struct vm_fault * vmf,struct file * fpin)405 static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,
406 struct file *fpin)
407 {
408 int flags = vmf->flags;
409
410 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 if (fault_flag_allow_retry_first(flags) &&
419 !(flags & FAULT_FLAG_RETRY_NOWAIT)) {
420 fpin = get_file(vmf->vma->vm_file);
421 mmap_read_unlock(vmf->vma->vm_mm);
422 }
423 return fpin;
424 }
425
426 #else /* !CONFIG_MMU */
clear_page_mlock(struct page * page)427 static inline void clear_page_mlock(struct page *page) { }
mlock_vma_page(struct page * page)428 static inline void mlock_vma_page(struct page *page) { }
mlock_migrate_page(struct page * new,struct page * old)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 */
mem_map_offset(struct page * base,int offset)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 */
mem_map_next(struct page * iter,struct page * base,int offset)449 static inline struct page *mem_map_next(struct page *iter,
450 struct page *base, int offset)
451 {
452 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
453 unsigned long pfn = page_to_pfn(base) + offset;
454 if (!pfn_valid(pfn))
455 return NULL;
456 return pfn_to_page(pfn);
457 }
458 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
mminit_dprintk(enum mminit_level level,const char * prefix,const char * fmt,...)486 static inline void mminit_dprintk(enum mminit_level level,
487 const char *prefix, const char *fmt, ...)
488 {
489 }
490
mminit_verify_pageflags_layout(void)491 static inline void mminit_verify_pageflags_layout(void)
492 {
493 }
494
mminit_verify_zonelist(void)495 static inline void mminit_verify_zonelist(void)
496 {
497 }
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
mminit_validate_memmodel_limits(unsigned long * start_pfn,unsigned long * end_pfn)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
node_reclaim(struct pglist_data * pgdat,gfp_t mask,unsigned int order)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
try_to_unmap_flush(void)588 static inline void try_to_unmap_flush(void)
589 {
590 }
try_to_unmap_flush_dirty(void)591 static inline void try_to_unmap_flush_dirty(void)
592 {
593 }
flush_tlb_batched_pending(struct mm_struct * mm)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
is_migrate_highatomic(enum migratetype migratetype)603 static inline bool is_migrate_highatomic(enum migratetype migratetype)
604 {
605 return migratetype == MIGRATE_HIGHATOMIC;
606 }
607
is_migrate_highatomic_page(struct page * page)608 static inline bool is_migrate_highatomic_page(struct page *page)
609 {
610 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 */
622
