1
2
3
4
5
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
17
18
19
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
27#define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
28
29
30#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
31
32
33#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
34
35void page_writeback_init(void);
36
37vm_fault_t do_swap_page(struct vm_fault *vmf);
38
39void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
40 unsigned long floor, unsigned long ceiling);
41
42static 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
47void 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
52void do_page_cache_ra(struct readahead_control *, unsigned long nr_to_read,
53 unsigned long lookahead_size);
54void force_page_cache_ra(struct readahead_control *, unsigned long nr);
55static inline void force_page_cache_readahead(struct address_space *mapping,
56 struct file *file, pgoff_t index, unsigned long nr_to_read)
57{
58 DEFINE_READAHEAD(ractl, file, &file->f_ra, mapping, index);
59 force_page_cache_ra(&ractl, nr_to_read);
60}
61
62unsigned find_lock_entries(struct address_space *mapping, pgoff_t start,
63 pgoff_t end, struct pagevec *pvec, pgoff_t *indices);
64
65
66
67
68
69
70
71
72
73
74
75
76
77static inline bool page_evictable(struct page *page)
78{
79 bool ret;
80
81
82 rcu_read_lock();
83 ret = !mapping_unevictable(page_mapping(page)) && !PageMlocked(page);
84 rcu_read_unlock();
85 return ret;
86}
87
88
89
90
91
92static inline void set_page_refcounted(struct page *page)
93{
94 VM_BUG_ON_PAGE(PageTail(page), page);
95 VM_BUG_ON_PAGE(page_ref_count(page), page);
96 set_page_count(page, 1);
97}
98
99extern unsigned long highest_memmap_pfn;
100
101
102
103
104
105#define MAX_RECLAIM_RETRIES 16
106
107
108
109
110extern int isolate_lru_page(struct page *page);
111extern void putback_lru_page(struct page *page);
112
113
114
115
116extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
117
118
119
120
121extern bool cgroup_memory_nokmem;
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140struct alloc_context {
141 struct zonelist *zonelist;
142 nodemask_t *nodemask;
143 struct zoneref *preferred_zoneref;
144 int migratetype;
145
146
147
148
149
150
151
152
153
154
155
156 enum zone_type highest_zoneidx;
157 bool spread_dirty_pages;
158};
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177static inline unsigned long
178__find_buddy_pfn(unsigned long page_pfn, unsigned int order)
179{
180 return page_pfn ^ (1 << order);
181}
182
183extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
184 unsigned long end_pfn, struct zone *zone);
185
186static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
187 unsigned long end_pfn, struct zone *zone)
188{
189 if (zone->contiguous)
190 return pfn_to_page(start_pfn);
191
192 return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
193}
194
195extern int __isolate_free_page(struct page *page, unsigned int order);
196extern void __putback_isolated_page(struct page *page, unsigned int order,
197 int mt);
198extern void memblock_free_pages(struct page *page, unsigned long pfn,
199 unsigned int order);
200extern void __free_pages_core(struct page *page, unsigned int order);
201extern void prep_compound_page(struct page *page, unsigned int order);
202extern void post_alloc_hook(struct page *page, unsigned int order,
203 gfp_t gfp_flags);
204extern int user_min_free_kbytes;
205
206extern void free_unref_page(struct page *page, unsigned int order);
207extern void free_unref_page_list(struct list_head *list);
208
209extern void zone_pcp_update(struct zone *zone, int cpu_online);
210extern void zone_pcp_reset(struct zone *zone);
211extern void zone_pcp_disable(struct zone *zone);
212extern void zone_pcp_enable(struct zone *zone);
213
214#if defined CONFIG_COMPACTION || defined CONFIG_CMA
215
216
217
218
219
220
221
222
223
224
225
226struct compact_control {
227 struct list_head freepages;
228 struct list_head migratepages;
229 unsigned int nr_freepages;
230 unsigned int nr_migratepages;
231 unsigned long free_pfn;
232
233
234
235
236
237
238 unsigned long migrate_pfn;
239 unsigned long fast_start_pfn;
240 struct zone *zone;
241 unsigned long total_migrate_scanned;
242 unsigned long total_free_scanned;
243 unsigned short fast_search_fail;
244 short search_order;
245 const gfp_t gfp_mask;
246 int order;
247 int migratetype;
248 const unsigned int alloc_flags;
249 const int highest_zoneidx;
250 enum migrate_mode mode;
251 bool ignore_skip_hint;
252 bool no_set_skip_hint;
253 bool ignore_block_suitable;
254 bool direct_compaction;
255 bool proactive_compaction;
256 bool whole_zone;
257 bool contended;
258 bool rescan;
259 bool alloc_contig;
260};
261
262
263
264
265
266struct capture_control {
267 struct compact_control *cc;
268 struct page *page;
269};
270
271unsigned long
272isolate_freepages_range(struct compact_control *cc,
273 unsigned long start_pfn, unsigned long end_pfn);
274int
275isolate_migratepages_range(struct compact_control *cc,
276 unsigned long low_pfn, unsigned long end_pfn);
277#endif
278int find_suitable_fallback(struct free_area *area, unsigned int order,
279 int migratetype, bool only_stealable, bool *can_steal);
280
281
282
283
284
285
286
287
288
289static inline unsigned int buddy_order(struct page *page)
290{
291
292 return page_private(page);
293}
294
295
296
297
298
299
300
301
302
303
304
305
306#define buddy_order_unsafe(page) READ_ONCE(page_private(page))
307
308
309
310
311
312
313
314
315static inline bool is_exec_mapping(vm_flags_t flags)
316{
317 return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
318}
319
320
321
322
323
324
325
326static inline bool is_stack_mapping(vm_flags_t flags)
327{
328 return (flags & VM_STACK) == VM_STACK;
329}
330
331
332
333
334static inline bool is_data_mapping(vm_flags_t flags)
335{
336 return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
337}
338
339
340void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
341 struct vm_area_struct *prev);
342void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma);
343
344#ifdef CONFIG_MMU
345extern long populate_vma_page_range(struct vm_area_struct *vma,
346 unsigned long start, unsigned long end, int *locked);
347extern long faultin_vma_page_range(struct vm_area_struct *vma,
348 unsigned long start, unsigned long end,
349 bool write, int *locked);
350extern void munlock_vma_pages_range(struct vm_area_struct *vma,
351 unsigned long start, unsigned long end);
352static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
353{
354 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
355}
356
357
358
359
360extern void mlock_vma_page(struct page *page);
361extern unsigned int munlock_vma_page(struct page *page);
362
363extern int mlock_future_check(struct mm_struct *mm, unsigned long flags,
364 unsigned long len);
365
366
367
368
369
370
371
372
373
374
375extern void clear_page_mlock(struct page *page);
376
377extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
378
379
380
381
382
383
384static inline unsigned long
385vma_address(struct page *page, struct vm_area_struct *vma)
386{
387 pgoff_t pgoff;
388 unsigned long address;
389
390 VM_BUG_ON_PAGE(PageKsm(page), page);
391 pgoff = page_to_pgoff(page);
392 if (pgoff >= vma->vm_pgoff) {
393 address = vma->vm_start +
394 ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
395
396 if (address < vma->vm_start || address >= vma->vm_end)
397 address = -EFAULT;
398 } else if (PageHead(page) &&
399 pgoff + compound_nr(page) - 1 >= vma->vm_pgoff) {
400
401 address = vma->vm_start;
402 } else {
403 address = -EFAULT;
404 }
405 return address;
406}
407
408
409
410
411
412
413static inline unsigned long
414vma_address_end(struct page *page, struct vm_area_struct *vma)
415{
416 pgoff_t pgoff;
417 unsigned long address;
418
419 VM_BUG_ON_PAGE(PageKsm(page), page);
420 pgoff = page_to_pgoff(page) + compound_nr(page);
421 address = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
422
423 if (address < vma->vm_start || address > vma->vm_end)
424 address = vma->vm_end;
425 return address;
426}
427
428static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf,
429 struct file *fpin)
430{
431 int flags = vmf->flags;
432
433 if (fpin)
434 return fpin;
435
436
437
438
439
440
441 if (fault_flag_allow_retry_first(flags) &&
442 !(flags & FAULT_FLAG_RETRY_NOWAIT)) {
443 fpin = get_file(vmf->vma->vm_file);
444 mmap_read_unlock(vmf->vma->vm_mm);
445 }
446 return fpin;
447}
448
449#else
450static inline void clear_page_mlock(struct page *page) { }
451static inline void mlock_vma_page(struct page *page) { }
452static inline void vunmap_range_noflush(unsigned long start, unsigned long end)
453{
454}
455#endif
456
457
458
459
460
461
462static inline struct page *mem_map_offset(struct page *base, int offset)
463{
464 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
465 return nth_page(base, offset);
466 return base + offset;
467}
468
469
470
471
472
473static inline struct page *mem_map_next(struct page *iter,
474 struct page *base, int offset)
475{
476 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
477 unsigned long pfn = page_to_pfn(base) + offset;
478 if (!pfn_valid(pfn))
479 return NULL;
480 return pfn_to_page(pfn);
481 }
482 return iter + 1;
483}
484
485
486enum mminit_level {
487 MMINIT_WARNING,
488 MMINIT_VERIFY,
489 MMINIT_TRACE
490};
491
492#ifdef CONFIG_DEBUG_MEMORY_INIT
493
494extern int mminit_loglevel;
495
496#define mminit_dprintk(level, prefix, fmt, arg...) \
497do { \
498 if (level < mminit_loglevel) { \
499 if (level <= MMINIT_WARNING) \
500 pr_warn("mminit::" prefix " " fmt, ##arg); \
501 else \
502 printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
503 } \
504} while (0)
505
506extern void mminit_verify_pageflags_layout(void);
507extern void mminit_verify_zonelist(void);
508#else
509
510static inline void mminit_dprintk(enum mminit_level level,
511 const char *prefix, const char *fmt, ...)
512{
513}
514
515static inline void mminit_verify_pageflags_layout(void)
516{
517}
518
519static inline void mminit_verify_zonelist(void)
520{
521}
522#endif
523
524
525#if defined(CONFIG_SPARSEMEM)
526extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
527 unsigned long *end_pfn);
528#else
529static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
530 unsigned long *end_pfn)
531{
532}
533#endif
534
535#define NODE_RECLAIM_NOSCAN -2
536#define NODE_RECLAIM_FULL -1
537#define NODE_RECLAIM_SOME 0
538#define NODE_RECLAIM_SUCCESS 1
539
540#ifdef CONFIG_NUMA
541extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int);
542#else
543static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask,
544 unsigned int order)
545{
546 return NODE_RECLAIM_NOSCAN;
547}
548#endif
549
550extern int hwpoison_filter(struct page *p);
551
552extern u32 hwpoison_filter_dev_major;
553extern u32 hwpoison_filter_dev_minor;
554extern u64 hwpoison_filter_flags_mask;
555extern u64 hwpoison_filter_flags_value;
556extern u64 hwpoison_filter_memcg;
557extern u32 hwpoison_filter_enable;
558
559extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
560 unsigned long, unsigned long,
561 unsigned long, unsigned long);
562
563extern void set_pageblock_order(void);
564unsigned int reclaim_clean_pages_from_list(struct zone *zone,
565 struct list_head *page_list);
566
567#define ALLOC_WMARK_MIN WMARK_MIN
568#define ALLOC_WMARK_LOW WMARK_LOW
569#define ALLOC_WMARK_HIGH WMARK_HIGH
570#define ALLOC_NO_WATERMARKS 0x04
571
572
573#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
574
575
576
577
578
579
580#ifdef CONFIG_MMU
581#define ALLOC_OOM 0x08
582#else
583#define ALLOC_OOM ALLOC_NO_WATERMARKS
584#endif
585
586#define ALLOC_HARDER 0x10
587#define ALLOC_HIGH 0x20
588#define ALLOC_CPUSET 0x40
589#define ALLOC_CMA 0x80
590#ifdef CONFIG_ZONE_DMA32
591#define ALLOC_NOFRAGMENT 0x100
592#else
593#define ALLOC_NOFRAGMENT 0x0
594#endif
595#define ALLOC_KSWAPD 0x800
596
597enum ttu_flags;
598struct tlbflush_unmap_batch;
599
600
601
602
603
604
605extern struct workqueue_struct *mm_percpu_wq;
606
607#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
608void try_to_unmap_flush(void);
609void try_to_unmap_flush_dirty(void);
610void flush_tlb_batched_pending(struct mm_struct *mm);
611#else
612static inline void try_to_unmap_flush(void)
613{
614}
615static inline void try_to_unmap_flush_dirty(void)
616{
617}
618static inline void flush_tlb_batched_pending(struct mm_struct *mm)
619{
620}
621#endif
622
623extern const struct trace_print_flags pageflag_names[];
624extern const struct trace_print_flags vmaflag_names[];
625extern const struct trace_print_flags gfpflag_names[];
626
627static inline bool is_migrate_highatomic(enum migratetype migratetype)
628{
629 return migratetype == MIGRATE_HIGHATOMIC;
630}
631
632static inline bool is_migrate_highatomic_page(struct page *page)
633{
634 return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC;
635}
636
637void setup_zone_pageset(struct zone *zone);
638
639struct migration_target_control {
640 int nid;
641 nodemask_t *nmask;
642 gfp_t gfp_mask;
643};
644
645
646
647
648#ifdef CONFIG_MMU
649int vmap_pages_range_noflush(unsigned long addr, unsigned long end,
650 pgprot_t prot, struct page **pages, unsigned int page_shift);
651#else
652static inline
653int vmap_pages_range_noflush(unsigned long addr, unsigned long end,
654 pgprot_t prot, struct page **pages, unsigned int page_shift)
655{
656 return -EINVAL;
657}
658#endif
659
660void vunmap_range_noflush(unsigned long start, unsigned long end);
661
662int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,
663 unsigned long addr, int page_nid, int *flags);
664
665#endif
666