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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 | |
0dc952dc CL |
8 | /* Check if a vma is migratable */ |
9 | static inline int vma_migratable(struct vm_area_struct *vma) | |
10 | { | |
11 | if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) | |
12 | return 0; | |
13 | return 1; | |
14 | } | |
15 | ||
b20a3503 CL |
16 | #ifdef CONFIG_MIGRATION |
17 | extern int isolate_lru_page(struct page *p, struct list_head *pagelist); | |
18 | extern int putback_lru_pages(struct list_head *l); | |
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19 | extern int migrate_page(struct address_space *, |
20 | struct page *, struct page *); | |
95a402c3 CL |
21 | extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long); |
22 | ||
2d1db3b1 CL |
23 | extern int fail_migrate_page(struct address_space *, |
24 | struct page *, struct page *); | |
b20a3503 CL |
25 | |
26 | extern int migrate_prep(void); | |
7b2259b3 CL |
27 | extern int migrate_vmas(struct mm_struct *mm, |
28 | const nodemask_t *from, const nodemask_t *to, | |
29 | unsigned long flags); | |
b20a3503 CL |
30 | #else |
31 | ||
32 | static inline int isolate_lru_page(struct page *p, struct list_head *list) | |
33 | { return -ENOSYS; } | |
34 | static inline int putback_lru_pages(struct list_head *l) { return 0; } | |
95a402c3 CL |
35 | static inline int migrate_pages(struct list_head *l, new_page_t x, |
36 | unsigned long private) { return -ENOSYS; } | |
b20a3503 | 37 | |
9bf9e89c CL |
38 | static inline int migrate_pages_to(struct list_head *pagelist, |
39 | struct vm_area_struct *vma, int dest) { return 0; } | |
40 | ||
b20a3503 CL |
41 | static inline int migrate_prep(void) { return -ENOSYS; } |
42 | ||
7b2259b3 CL |
43 | static inline int migrate_vmas(struct mm_struct *mm, |
44 | const nodemask_t *from, const nodemask_t *to, | |
45 | unsigned long flags) | |
46 | { | |
47 | return -ENOSYS; | |
48 | } | |
49 | ||
b20a3503 CL |
50 | /* Possible settings for the migrate_page() method in address_operations */ |
51 | #define migrate_page NULL | |
52 | #define fail_migrate_page NULL | |
53 | ||
54 | #endif /* CONFIG_MIGRATION */ | |
55 | #endif /* _LINUX_MIGRATE_H */ |