1 #ifndef _LINUX_MIGRATE_H
2 #define _LINUX_MIGRATE_H
4 #include <linux/config.h>
7 #ifdef CONFIG_MIGRATION
8 extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
9 extern int putback_lru_pages(struct list_head *l);
10 extern int migrate_page(struct page *, struct page *);
11 extern void migrate_page_copy(struct page *, struct page *);
12 extern int migrate_page_remove_references(struct page *, struct page *, int);
13 extern int migrate_pages(struct list_head *l, struct list_head *t,
14 struct list_head *moved, struct list_head *failed);
15 extern int migrate_pages_to(struct list_head *pagelist,
16 struct vm_area_struct *vma, int dest);
17 extern int fail_migrate_page(struct page *, struct page *);
19 extern int migrate_prep(void);
23 static inline int isolate_lru_page(struct page *p, struct list_head *list)
25 static inline int putback_lru_pages(struct list_head *l) { return 0; }
26 static inline int migrate_pages(struct list_head *l, struct list_head *t,
27 struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
29 static inline int migrate_pages_to(struct list_head *pagelist,
30 struct vm_area_struct *vma, int dest) { return 0; }
32 static inline int migrate_prep(void) { return -ENOSYS; }
34 /* Possible settings for the migrate_page() method in address_operations */
35 #define migrate_page NULL
36 #define fail_migrate_page NULL
38 #endif /* CONFIG_MIGRATION */
39 #endif /* _LINUX_MIGRATE_H */