Commit | Line | Data |
---|---|---|
b20a3503 CL |
1 | #ifndef _LINUX_MIGRATE_H |
2 | #define _LINUX_MIGRATE_H | |
3 | ||
b20a3503 | 4 | #include <linux/mm.h> |
906e0be1 | 5 | #include <linux/mempolicy.h> |
6536e312 | 6 | #include <linux/migrate_mode.h> |
b20a3503 | 7 | |
742755a1 | 8 | typedef struct page *new_page_t(struct page *, unsigned long private, int **); |
95a402c3 | 9 | |
78bd5209 RA |
10 | /* |
11 | * Return values from addresss_space_operations.migratepage(): | |
12 | * - negative errno on page migration failure; | |
13 | * - zero on page migration success; | |
14 | */ | |
15 | #define MIGRATEPAGE_SUCCESS 0 | |
16 | ||
906e0be1 | 17 | #ifdef CONFIG_MIGRATION |
64cdd548 | 18 | |
e13861d8 | 19 | extern void putback_lru_pages(struct list_head *l); |
2d1db3b1 | 20 | extern int migrate_page(struct address_space *, |
a6bc32b8 | 21 | struct page *, struct page *, enum migrate_mode); |
62b61f61 | 22 | extern int migrate_pages(struct list_head *l, new_page_t x, |
7f0f2496 | 23 | unsigned long private, bool offlining, |
a6bc32b8 | 24 | enum migrate_mode mode); |
189ebff2 | 25 | extern int migrate_huge_page(struct page *, new_page_t x, |
7f0f2496 | 26 | unsigned long private, bool offlining, |
a6bc32b8 | 27 | enum migrate_mode mode); |
95a402c3 | 28 | |
2d1db3b1 CL |
29 | extern int fail_migrate_page(struct address_space *, |
30 | struct page *, struct page *); | |
b20a3503 CL |
31 | |
32 | extern int migrate_prep(void); | |
748446bb | 33 | extern int migrate_prep_local(void); |
7b2259b3 CL |
34 | extern int migrate_vmas(struct mm_struct *mm, |
35 | const nodemask_t *from, const nodemask_t *to, | |
36 | unsigned long flags); | |
290408d4 NH |
37 | extern void migrate_page_copy(struct page *newpage, struct page *page); |
38 | extern int migrate_huge_page_move_mapping(struct address_space *mapping, | |
39 | struct page *newpage, struct page *page); | |
b20a3503 | 40 | #else |
64cdd548 | 41 | |
e13861d8 | 42 | static inline void putback_lru_pages(struct list_head *l) {} |
95a402c3 | 43 | static inline int migrate_pages(struct list_head *l, new_page_t x, |
7f0f2496 | 44 | unsigned long private, bool offlining, |
a6bc32b8 | 45 | enum migrate_mode mode) { return -ENOSYS; } |
189ebff2 | 46 | static inline int migrate_huge_page(struct page *page, new_page_t x, |
7f0f2496 | 47 | unsigned long private, bool offlining, |
a6bc32b8 | 48 | enum migrate_mode mode) { return -ENOSYS; } |
9bf9e89c | 49 | |
b20a3503 | 50 | static inline int migrate_prep(void) { return -ENOSYS; } |
748446bb | 51 | static inline int migrate_prep_local(void) { return -ENOSYS; } |
b20a3503 | 52 | |
7b2259b3 CL |
53 | static inline int migrate_vmas(struct mm_struct *mm, |
54 | const nodemask_t *from, const nodemask_t *to, | |
55 | unsigned long flags) | |
56 | { | |
57 | return -ENOSYS; | |
58 | } | |
59 | ||
290408d4 NH |
60 | static inline void migrate_page_copy(struct page *newpage, |
61 | struct page *page) {} | |
62 | ||
6f39ce05 | 63 | static inline int migrate_huge_page_move_mapping(struct address_space *mapping, |
290408d4 NH |
64 | struct page *newpage, struct page *page) |
65 | { | |
66 | return -ENOSYS; | |
67 | } | |
68 | ||
b20a3503 CL |
69 | /* Possible settings for the migrate_page() method in address_operations */ |
70 | #define migrate_page NULL | |
71 | #define fail_migrate_page NULL | |
72 | ||
73 | #endif /* CONFIG_MIGRATION */ | |
74 | #endif /* _LINUX_MIGRATE_H */ |