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11#ifndef __MM_INTERNAL_H
12#define __MM_INTERNAL_H
13
14#include <linux/mm.h>
15
16void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
17 unsigned long floor, unsigned long ceiling);
18
19static inline void set_page_count(struct page *page, int v)
20{
21 atomic_set(&page->_count, v);
22}
23
24
25
26
27
28static inline void set_page_refcounted(struct page *page)
29{
30 VM_BUG_ON(PageTail(page));
31 VM_BUG_ON(atomic_read(&page->_count));
32 set_page_count(page, 1);
33}
34
35static inline void __get_page_tail_foll(struct page *page,
36 bool get_page_head)
37{
38
39
40
41
42
43
44
45
46
47
48
49 VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
50 VM_BUG_ON(atomic_read(&page->_count) != 0);
51 VM_BUG_ON(page_mapcount(page) < 0);
52 if (get_page_head)
53 atomic_inc(&page->first_page->_count);
54 atomic_inc(&page->_mapcount);
55}
56
57
58
59
60
61
62static inline void get_page_foll(struct page *page)
63{
64 if (unlikely(PageTail(page)))
65
66
67
68
69
70 __get_page_tail_foll(page, true);
71 else {
72
73
74
75
76 VM_BUG_ON(atomic_read(&page->_count) <= 0);
77 atomic_inc(&page->_count);
78 }
79}
80
81extern unsigned long highest_memmap_pfn;
82
83
84
85
86extern int isolate_lru_page(struct page *page);
87extern void putback_lru_page(struct page *page);
88extern unsigned long zone_reclaimable_pages(struct zone *zone);
89extern bool zone_reclaimable(struct zone *zone);
90
91
92
93
94extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
95
96
97
98
99extern void __free_pages_bootmem(struct page *page, unsigned int order);
100extern void prep_compound_page(struct page *page, unsigned long order);
101#ifdef CONFIG_MEMORY_FAILURE
102extern bool is_free_buddy_page(struct page *page);
103#endif
104
105#if defined CONFIG_COMPACTION || defined CONFIG_CMA
106
107
108
109
110
111
112
113
114
115
116
117struct compact_control {
118 struct list_head freepages;
119 struct list_head migratepages;
120 unsigned long nr_freepages;
121 unsigned long nr_migratepages;
122 unsigned long free_pfn;
123 unsigned long migrate_pfn;
124 bool sync;
125 bool ignore_skip_hint;
126 bool finished_update_free;
127
128
129 bool finished_update_migrate;
130
131 int order;
132 int migratetype;
133 struct zone *zone;
134 bool contended;
135};
136
137unsigned long
138isolate_freepages_range(struct compact_control *cc,
139 unsigned long start_pfn, unsigned long end_pfn);
140unsigned long
141isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
142 unsigned long low_pfn, unsigned long end_pfn, bool unevictable);
143
144#endif
145
146
147
148
149
150
151static inline unsigned long page_order(struct page *page)
152{
153
154 return page_private(page);
155}
156
157
158void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
159 struct vm_area_struct *prev, struct rb_node *rb_parent);
160
161#ifdef CONFIG_MMU
162extern long __mlock_vma_pages_range(struct vm_area_struct *vma,
163 unsigned long start, unsigned long end, int *nonblocking);
164extern void munlock_vma_pages_range(struct vm_area_struct *vma,
165 unsigned long start, unsigned long end);
166static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
167{
168 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
169}
170
171
172
173
174
175static inline int mlocked_vma_newpage(struct vm_area_struct *vma,
176 struct page *page)
177{
178 VM_BUG_ON(PageLRU(page));
179
180 if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
181 return 0;
182
183 if (!TestSetPageMlocked(page)) {
184 mod_zone_page_state(page_zone(page), NR_MLOCK,
185 hpage_nr_pages(page));
186 count_vm_event(UNEVICTABLE_PGMLOCKED);
187 }
188 return 1;
189}
190
191
192
193
194extern void mlock_vma_page(struct page *page);
195extern unsigned int munlock_vma_page(struct page *page);
196
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204
205
206extern void clear_page_mlock(struct page *page);
207
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210
211
212static inline void mlock_migrate_page(struct page *newpage, struct page *page)
213{
214 if (TestClearPageMlocked(page)) {
215 unsigned long flags;
216 int nr_pages = hpage_nr_pages(page);
217
218 local_irq_save(flags);
219 __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
220 SetPageMlocked(newpage);
221 __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
222 local_irq_restore(flags);
223 }
224}
225
226extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
227
228#ifdef CONFIG_TRANSPARENT_HUGEPAGE
229extern unsigned long vma_address(struct page *page,
230 struct vm_area_struct *vma);
231#endif
232#else
233static inline int mlocked_vma_newpage(struct vm_area_struct *v, struct page *p)
234{
235 return 0;
236}
237static inline void clear_page_mlock(struct page *page) { }
238static inline void mlock_vma_page(struct page *page) { }
239static inline void mlock_migrate_page(struct page *new, struct page *old) { }
240
241#endif
242
243
244
245
246
247
248static inline struct page *mem_map_offset(struct page *base, int offset)
249{
250 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
251 return pfn_to_page(page_to_pfn(base) + offset);
252 return base + offset;
253}
254
255
256
257
258
259static inline struct page *mem_map_next(struct page *iter,
260 struct page *base, int offset)
261{
262 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
263 unsigned long pfn = page_to_pfn(base) + offset;
264 if (!pfn_valid(pfn))
265 return NULL;
266 return pfn_to_page(pfn);
267 }
268 return iter + 1;
269}
270
271
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273
274
275
276
277#ifdef CONFIG_SPARSEMEM
278#define __paginginit __meminit
279#else
280#define __paginginit __init
281#endif
282
283
284enum mminit_level {
285 MMINIT_WARNING,
286 MMINIT_VERIFY,
287 MMINIT_TRACE
288};
289
290#ifdef CONFIG_DEBUG_MEMORY_INIT
291
292extern int mminit_loglevel;
293
294#define mminit_dprintk(level, prefix, fmt, arg...) \
295do { \
296 if (level < mminit_loglevel) { \
297 printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
298 printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
299 } \
300} while (0)
301
302extern void mminit_verify_pageflags_layout(void);
303extern void mminit_verify_page_links(struct page *page,
304 enum zone_type zone, unsigned long nid, unsigned long pfn);
305extern void mminit_verify_zonelist(void);
306
307#else
308
309static inline void mminit_dprintk(enum mminit_level level,
310 const char *prefix, const char *fmt, ...)
311{
312}
313
314static inline void mminit_verify_pageflags_layout(void)
315{
316}
317
318static inline void mminit_verify_page_links(struct page *page,
319 enum zone_type zone, unsigned long nid, unsigned long pfn)
320{
321}
322
323static inline void mminit_verify_zonelist(void)
324{
325}
326#endif
327
328
329#if defined(CONFIG_SPARSEMEM)
330extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
331 unsigned long *end_pfn);
332#else
333static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
334 unsigned long *end_pfn)
335{
336}
337#endif
338
339#define ZONE_RECLAIM_NOSCAN -2
340#define ZONE_RECLAIM_FULL -1
341#define ZONE_RECLAIM_SOME 0
342#define ZONE_RECLAIM_SUCCESS 1
343
344extern int hwpoison_filter(struct page *p);
345
346extern u32 hwpoison_filter_dev_major;
347extern u32 hwpoison_filter_dev_minor;
348extern u64 hwpoison_filter_flags_mask;
349extern u64 hwpoison_filter_flags_value;
350extern u64 hwpoison_filter_memcg;
351extern u32 hwpoison_filter_enable;
352
353extern unsigned long vm_mmap_pgoff(struct file *, unsigned long,
354 unsigned long, unsigned long,
355 unsigned long, unsigned long);
356
357extern void set_pageblock_order(void);
358unsigned long reclaim_clean_pages_from_list(struct zone *zone,
359 struct list_head *page_list);
360
361#define ALLOC_WMARK_MIN WMARK_MIN
362#define ALLOC_WMARK_LOW WMARK_LOW
363#define ALLOC_WMARK_HIGH WMARK_HIGH
364#define ALLOC_NO_WATERMARKS 0x04
365
366
367#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
368
369#define ALLOC_HARDER 0x10
370#define ALLOC_HIGH 0x20
371#define ALLOC_CPUSET 0x40
372#define ALLOC_CMA 0x80
373
374#endif
375