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_pages(struct list_head *l, 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);
31 extern int migrate_huge_page_move_mapping(struct address_space *mapping,
32 struct page *newpage, struct page *page);
33 #else
34
putback_lru_pages(struct list_head * l)35 static inline void putback_lru_pages(struct list_head *l) {}
migrate_pages(struct list_head * l,new_page_t x,unsigned long private,bool offlining,enum migrate_mode mode)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; }
migrate_huge_pages(struct list_head * l,new_page_t x,unsigned long private,bool offlining,enum migrate_mode mode)39 static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
40 unsigned long private, bool offlining,
41 enum migrate_mode mode) { return -ENOSYS; }
42
migrate_prep(void)43 static inline int migrate_prep(void) { return -ENOSYS; }
migrate_prep_local(void)44 static inline int migrate_prep_local(void) { return -ENOSYS; }
45
migrate_vmas(struct mm_struct * mm,const nodemask_t * from,const nodemask_t * to,unsigned long flags)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
migrate_page_copy(struct page * newpage,struct page * page)53 static inline void migrate_page_copy(struct page *newpage,
54 struct page *page) {}
55
migrate_huge_page_move_mapping(struct address_space * mapping,struct page * newpage,struct page * page)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 */
68