Linux Kernel  3.7.1
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migrate.h
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1 #ifndef _LINUX_MIGRATE_H
2 #define _LINUX_MIGRATE_H
3 
4 #include <linux/mm.h>
5 #include <linux/mempolicy.h>
6 #include <linux/migrate_mode.h>
7 
8 typedef struct page *new_page_t(struct page *, unsigned long private, int **);
9 
10 #ifdef CONFIG_MIGRATION
11 
12 extern void putback_lru_pages(struct list_head *l);
13 extern int migrate_page(struct address_space *,
14  struct page *, struct page *, enum migrate_mode);
15 extern int migrate_pages(struct list_head *l, new_page_t x,
16  unsigned long private, bool offlining,
17  enum migrate_mode mode);
18 extern int migrate_huge_page(struct page *, new_page_t x,
19  unsigned long private, bool offlining,
20  enum migrate_mode mode);
21 
22 extern int fail_migrate_page(struct address_space *,
23  struct page *, struct page *);
24 
25 extern int migrate_prep(void);
26 extern int migrate_prep_local(void);
27 extern int migrate_vmas(struct mm_struct *mm,
28  const nodemask_t *from, const nodemask_t *to,
29  unsigned long flags);
30 extern void migrate_page_copy(struct page *newpage, struct page *page);
32  struct page *newpage, struct page *page);
33 #else
34 
35 static inline void putback_lru_pages(struct list_head *l) {}
36 static inline int migrate_pages(struct list_head *l, new_page_t x,
37  unsigned long private, bool offlining,
38  enum migrate_mode mode) { return -ENOSYS; }
39 static inline int migrate_huge_page(struct page *page, new_page_t x,
40  unsigned long private, bool offlining,
41  enum migrate_mode mode) { return -ENOSYS; }
42 
43 static inline int migrate_prep(void) { return -ENOSYS; }
44 static inline int migrate_prep_local(void) { return -ENOSYS; }
45 
46 static inline int migrate_vmas(struct mm_struct *mm,
47  const nodemask_t *from, const nodemask_t *to,
48  unsigned long flags)
49 {
50  return -ENOSYS;
51 }
52 
53 static inline void migrate_page_copy(struct page *newpage,
54  struct page *page) {}
55 
56 static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
57  struct page *newpage, struct page *page)
58 {
59  return -ENOSYS;
60 }
61 
62 /* Possible settings for the migrate_page() method in address_operations */
63 #define migrate_page NULL
64 #define fail_migrate_page NULL
65 
66 #endif /* CONFIG_MIGRATION */
67 #endif /* _LINUX_MIGRATE_H */