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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 __put_page(struct page *page)
36{
37 atomic_dec(&page->_count);
38}
39
40extern unsigned long highest_memmap_pfn;
41
42
43
44
45extern int isolate_lru_page(struct page *page);
46extern void putback_lru_page(struct page *page);
47
48
49
50
51extern void __free_pages_bootmem(struct page *page, unsigned int order);
52extern void prep_compound_page(struct page *page, unsigned long order);
53#ifdef CONFIG_MEMORY_FAILURE
54extern bool is_free_buddy_page(struct page *page);
55#endif
56
57
58
59
60
61
62
63static inline unsigned long page_order(struct page *page)
64{
65
66 return page_private(page);
67}
68
69#ifdef CONFIG_MMU
70extern long mlock_vma_pages_range(struct vm_area_struct *vma,
71 unsigned long start, unsigned long end);
72extern void munlock_vma_pages_range(struct vm_area_struct *vma,
73 unsigned long start, unsigned long end);
74static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
75{
76 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
77}
78
79
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81
82
83
84static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page)
85{
86 VM_BUG_ON(PageLRU(page));
87
88 if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
89 return 0;
90
91 if (!TestSetPageMlocked(page)) {
92 inc_zone_page_state(page, NR_MLOCK);
93 count_vm_event(UNEVICTABLE_PGMLOCKED);
94 }
95 return 1;
96}
97
98
99
100
101extern void mlock_vma_page(struct page *page);
102extern void munlock_vma_page(struct page *page);
103
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111
112
113extern void __clear_page_mlock(struct page *page);
114static inline void clear_page_mlock(struct page *page)
115{
116 if (unlikely(TestClearPageMlocked(page)))
117 __clear_page_mlock(page);
118}
119
120
121
122
123
124static inline void mlock_migrate_page(struct page *newpage, struct page *page)
125{
126 if (TestClearPageMlocked(page)) {
127 unsigned long flags;
128
129 local_irq_save(flags);
130 __dec_zone_page_state(page, NR_MLOCK);
131 SetPageMlocked(newpage);
132 __inc_zone_page_state(newpage, NR_MLOCK);
133 local_irq_restore(flags);
134 }
135}
136
137#ifdef CONFIG_TRANSPARENT_HUGEPAGE
138extern unsigned long vma_address(struct page *page,
139 struct vm_area_struct *vma);
140#endif
141#else
142static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
143{
144 return 0;
145}
146static inline void clear_page_mlock(struct page *page) { }
147static inline void mlock_vma_page(struct page *page) { }
148static inline void mlock_migrate_page(struct page *new, struct page *old) { }
149
150#endif
151
152
153
154
155
156
157static inline struct page *mem_map_offset(struct page *base, int offset)
158{
159 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
160 return pfn_to_page(page_to_pfn(base) + offset);
161 return base + offset;
162}
163
164
165
166
167
168static inline struct page *mem_map_next(struct page *iter,
169 struct page *base, int offset)
170{
171 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
172 unsigned long pfn = page_to_pfn(base) + offset;
173 if (!pfn_valid(pfn))
174 return NULL;
175 return pfn_to_page(pfn);
176 }
177 return iter + 1;
178}
179
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184
185
186#ifdef CONFIG_SPARSEMEM
187#define __paginginit __meminit
188#else
189#define __paginginit __init
190#endif
191
192
193enum mminit_level {
194 MMINIT_WARNING,
195 MMINIT_VERIFY,
196 MMINIT_TRACE
197};
198
199#ifdef CONFIG_DEBUG_MEMORY_INIT
200
201extern int mminit_loglevel;
202
203#define mminit_dprintk(level, prefix, fmt, arg...) \
204do { \
205 if (level < mminit_loglevel) { \
206 printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \
207 printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \
208 } \
209} while (0)
210
211extern void mminit_verify_pageflags_layout(void);
212extern void mminit_verify_page_links(struct page *page,
213 enum zone_type zone, unsigned long nid, unsigned long pfn);
214extern void mminit_verify_zonelist(void);
215
216#else
217
218static inline void mminit_dprintk(enum mminit_level level,
219 const char *prefix, const char *fmt, ...)
220{
221}
222
223static inline void mminit_verify_pageflags_layout(void)
224{
225}
226
227static inline void mminit_verify_page_links(struct page *page,
228 enum zone_type zone, unsigned long nid, unsigned long pfn)
229{
230}
231
232static inline void mminit_verify_zonelist(void)
233{
234}
235#endif
236
237
238#if defined(CONFIG_SPARSEMEM)
239extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
240 unsigned long *end_pfn);
241#else
242static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
243 unsigned long *end_pfn)
244{
245}
246#endif
247
248#define ZONE_RECLAIM_NOSCAN -2
249#define ZONE_RECLAIM_FULL -1
250#define ZONE_RECLAIM_SOME 0
251#define ZONE_RECLAIM_SUCCESS 1
252#endif
253
254extern int hwpoison_filter(struct page *p);
255
256extern u32 hwpoison_filter_dev_major;
257extern u32 hwpoison_filter_dev_minor;
258extern u64 hwpoison_filter_flags_mask;
259extern u64 hwpoison_filter_flags_value;
260extern u64 hwpoison_filter_memcg;
261extern u32 hwpoison_filter_enable;
262