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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>
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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
29
30#define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
31
32
33#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
34
35
36#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
37
38void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
39 unsigned long floor, unsigned long ceiling);
40
41void unmap_page_range(struct mmu_gather *tlb,
42 struct vm_area_struct *vma,
43 unsigned long addr, unsigned long end,
44 struct zap_details *details);
45
46extern int __do_page_cache_readahead(struct address_space *mapping,
47 struct file *filp, pgoff_t offset, unsigned long nr_to_read,
48 unsigned long lookahead_size);
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52
53static inline unsigned long ra_submit(struct file_ra_state *ra,
54 struct address_space *mapping, struct file *filp)
55{
56 return __do_page_cache_readahead(mapping, filp,
57 ra->start, ra->size, ra->async_size);
58}
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63
64static inline void set_page_refcounted(struct page *page)
65{
66 VM_BUG_ON_PAGE(PageTail(page), page);
67 VM_BUG_ON_PAGE(page_ref_count(page), page);
68 set_page_count(page, 1);
69}
70
71extern unsigned long highest_memmap_pfn;
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76extern int isolate_lru_page(struct page *page);
77extern void putback_lru_page(struct page *page);
78extern bool zone_reclaimable(struct zone *zone);
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83extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
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102struct alloc_context {
103 struct zonelist *zonelist;
104 nodemask_t *nodemask;
105 struct zone *preferred_zone;
106 int classzone_idx;
107 int migratetype;
108 enum zone_type high_zoneidx;
109 bool spread_dirty_pages;
110};
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129static inline unsigned long
130__find_buddy_index(unsigned long page_idx, unsigned int order)
131{
132 return page_idx ^ (1 << order);
133}
134
135extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
136 unsigned long end_pfn, struct zone *zone);
137
138static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
139 unsigned long end_pfn, struct zone *zone)
140{
141 if (zone->contiguous)
142 return pfn_to_page(start_pfn);
143
144 return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
145}
146
147extern int __isolate_free_page(struct page *page, unsigned int order);
148extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
149 unsigned int order);
150extern void prep_compound_page(struct page *page, unsigned int order);
151extern int user_min_free_kbytes;
152
153#if defined CONFIG_COMPACTION || defined CONFIG_CMA
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164
165struct compact_control {
166 struct list_head freepages;
167 struct list_head migratepages;
168 unsigned long nr_freepages;
169 unsigned long nr_migratepages;
170 unsigned long free_pfn;
171 unsigned long migrate_pfn;
172 unsigned long last_migrated_pfn;
173 enum migrate_mode mode;
174 bool ignore_skip_hint;
175 bool direct_compaction;
176 int order;
177 const gfp_t gfp_mask;
178 const int alloc_flags;
179 const int classzone_idx;
180 struct zone *zone;
181 int contended;
182
183
184
185};
186
187unsigned long
188isolate_freepages_range(struct compact_control *cc,
189 unsigned long start_pfn, unsigned long end_pfn);
190unsigned long
191isolate_migratepages_range(struct compact_control *cc,
192 unsigned long low_pfn, unsigned long end_pfn);
193int find_suitable_fallback(struct free_area *area, unsigned int order,
194 int migratetype, bool only_stealable, bool *can_steal);
195
196#endif
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205
206static inline unsigned int page_order(struct page *page)
207{
208
209 return page_private(page);
210}
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223#define page_order_unsafe(page) READ_ONCE(page_private(page))
224
225static inline bool is_cow_mapping(vm_flags_t flags)
226{
227 return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
228}
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237static inline bool is_exec_mapping(vm_flags_t flags)
238{
239 return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
240}
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248static inline bool is_stack_mapping(vm_flags_t flags)
249{
250 return (flags & VM_STACK) == VM_STACK;
251}
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256static inline bool is_data_mapping(vm_flags_t flags)
257{
258 return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
259}
260
261
262void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
263 struct vm_area_struct *prev, struct rb_node *rb_parent);
264
265#ifdef CONFIG_MMU
266extern long populate_vma_page_range(struct vm_area_struct *vma,
267 unsigned long start, unsigned long end, int *nonblocking);
268extern void munlock_vma_pages_range(struct vm_area_struct *vma,
269 unsigned long start, unsigned long end);
270static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
271{
272 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
273}
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278extern void mlock_vma_page(struct page *page);
279extern unsigned int munlock_vma_page(struct page *page);
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290extern void clear_page_mlock(struct page *page);
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297static inline void mlock_migrate_page(struct page *newpage, struct page *page)
298{
299 if (TestClearPageMlocked(page)) {
300 int nr_pages = hpage_nr_pages(page);
301
302
303 __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
304 SetPageMlocked(newpage);
305 __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
306 }
307}
308
309extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
310
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313
314static inline unsigned long
315__vma_address(struct page *page, struct vm_area_struct *vma)
316{
317 pgoff_t pgoff = page_to_pgoff(page);
318 return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
319}
320
321static inline unsigned long
322vma_address(struct page *page, struct vm_area_struct *vma)
323{
324 unsigned long address = __vma_address(page, vma);
325
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327 VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
328
329 return address;
330}
331
332#else
333static inline void clear_page_mlock(struct page *page) { }
334static inline void mlock_vma_page(struct page *page) { }
335static inline void mlock_migrate_page(struct page *new, struct page *old) { }
336
337#endif
338
339
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343
344static inline struct page *mem_map_offset(struct page *base, int offset)
345{
346 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
347 return nth_page(base, offset);
348 return base + offset;
349}
350
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354
355static inline struct page *mem_map_next(struct page *iter,
356 struct page *base, int offset)
357{
358 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
359 unsigned long pfn = page_to_pfn(base) + offset;
360 if (!pfn_valid(pfn))
361 return NULL;
362 return pfn_to_page(pfn);
363 }
364 return iter + 1;
365}
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372
373#ifdef CONFIG_SPARSEMEM
374#define __paginginit __meminit
375#else
376#define __paginginit __init
377#endif
378
379
380enum mminit_level {
381 MMINIT_WARNING,
382 MMINIT_VERIFY,
383 MMINIT_TRACE
384};
385
386#ifdef CONFIG_DEBUG_MEMORY_INIT
387
388extern int mminit_loglevel;
389
390#define mminit_dprintk(level, prefix, fmt, arg...) \
391do { \
392 if (level < mminit_loglevel) { \
393 if (level <= MMINIT_WARNING) \
394 pr_warn("mminit::" prefix " " fmt, ##arg); \
395 else \
396 printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
397 } \
398} while (0)
399
400extern void mminit_verify_pageflags_layout(void);
401extern void mminit_verify_zonelist(void);
402#else
403
404static inline void mminit_dprintk(enum mminit_level level,
405 const char *prefix, const char *fmt, ...)
406{
407}
408
409static inline void mminit_verify_pageflags_layout(void)
410{
411}
412
413static inline void mminit_verify_zonelist(void)
414{
415}
416#endif
417
418
419#if defined(CONFIG_SPARSEMEM)
420extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
421 unsigned long *end_pfn);
422#else
423static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
424 unsigned long *end_pfn)
425{
426}
427#endif
428
429#define ZONE_RECLAIM_NOSCAN -2
430#define ZONE_RECLAIM_FULL -1
431#define ZONE_RECLAIM_SOME 0
432#define ZONE_RECLAIM_SUCCESS 1
433
434extern int hwpoison_filter(struct page *p);
435
436extern u32 hwpoison_filter_dev_major;
437extern u32 hwpoison_filter_dev_minor;
438extern u64 hwpoison_filter_flags_mask;
439extern u64 hwpoison_filter_flags_value;
440extern u64 hwpoison_filter_memcg;
441extern u32 hwpoison_filter_enable;
442
443extern unsigned long vm_mmap_pgoff(struct file *, unsigned long,
444 unsigned long, unsigned long,
445 unsigned long, unsigned long);
446
447extern void set_pageblock_order(void);
448unsigned long reclaim_clean_pages_from_list(struct zone *zone,
449 struct list_head *page_list);
450
451#define ALLOC_WMARK_MIN WMARK_MIN
452#define ALLOC_WMARK_LOW WMARK_LOW
453#define ALLOC_WMARK_HIGH WMARK_HIGH
454#define ALLOC_NO_WATERMARKS 0x04
455
456
457#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
458
459#define ALLOC_HARDER 0x10
460#define ALLOC_HIGH 0x20
461#define ALLOC_CPUSET 0x40
462#define ALLOC_CMA 0x80
463#define ALLOC_FAIR 0x100
464
465enum ttu_flags;
466struct tlbflush_unmap_batch;
467
468#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
469void try_to_unmap_flush(void);
470void try_to_unmap_flush_dirty(void);
471#else
472static inline void try_to_unmap_flush(void)
473{
474}
475static inline void try_to_unmap_flush_dirty(void)
476{
477}
478
479#endif
480
481extern const struct trace_print_flags pageflag_names[];
482extern const struct trace_print_flags vmaflag_names[];
483extern const struct trace_print_flags gfpflag_names[];
484
485#endif
486