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b20a3503 CL |
1 | #ifndef _LINUX_MIGRATE_H |
2 | #define _LINUX_MIGRATE_H | |
3 | ||
b20a3503 CL |
4 | #include <linux/mm.h> |
5 | ||
742755a1 | 6 | typedef struct page *new_page_t(struct page *, unsigned long private, int **); |
95a402c3 | 7 | |
b20a3503 CL |
8 | #ifdef CONFIG_MIGRATION |
9 | extern int isolate_lru_page(struct page *p, struct list_head *pagelist); | |
10 | extern int putback_lru_pages(struct list_head *l); | |
2d1db3b1 CL |
11 | extern int migrate_page(struct address_space *, |
12 | struct page *, struct page *); | |
95a402c3 CL |
13 | extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long); |
14 | ||
2d1db3b1 CL |
15 | extern int fail_migrate_page(struct address_space *, |
16 | struct page *, struct page *); | |
b20a3503 CL |
17 | |
18 | extern int migrate_prep(void); | |
19 | ||
20 | #else | |
21 | ||
22 | static inline int isolate_lru_page(struct page *p, struct list_head *list) | |
23 | { return -ENOSYS; } | |
24 | static inline int putback_lru_pages(struct list_head *l) { return 0; } | |
95a402c3 CL |
25 | static inline int migrate_pages(struct list_head *l, new_page_t x, |
26 | unsigned long private) { return -ENOSYS; } | |
b20a3503 | 27 | |
9bf9e89c CL |
28 | static inline int migrate_pages_to(struct list_head *pagelist, |
29 | struct vm_area_struct *vma, int dest) { return 0; } | |
30 | ||
b20a3503 CL |
31 | static inline int migrate_prep(void) { return -ENOSYS; } |
32 | ||
33 | /* Possible settings for the migrate_page() method in address_operations */ | |
34 | #define migrate_page NULL | |
35 | #define fail_migrate_page NULL | |
36 | ||
37 | #endif /* CONFIG_MIGRATION */ | |
38 | #endif /* _LINUX_MIGRATE_H */ |