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- #ifndef _LINUX_MIGRATE_H
- #define _LINUX_MIGRATE_H
-
- #include <linux/mm.h>
-
- #ifdef CONFIG_MIGRATION
- extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
- extern int putback_lru_pages(struct list_head *l);
- extern int migrate_page(struct page *, struct page *);
- extern void migrate_page_copy(struct page *, struct page *);
- extern int migrate_page_remove_references(struct page *, struct page *, int);
- extern int migrate_pages(struct list_head *l, struct list_head *t,
- struct list_head *moved, struct list_head *failed);
- extern int migrate_pages_to(struct list_head *pagelist,
- struct vm_area_struct *vma, int dest);
- extern int fail_migrate_page(struct page *, struct page *);
-
- extern int migrate_prep(void);
-
- #else
-
- static inline int isolate_lru_page(struct page *p, struct list_head *list)
- { return -ENOSYS; }
- static inline int putback_lru_pages(struct list_head *l) { return 0; }
- static inline int migrate_pages(struct list_head *l, struct list_head *t,
- struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
-
- static inline int migrate_pages_to(struct list_head *pagelist,
- struct vm_area_struct *vma, int dest) { return 0; }
-
- static inline int migrate_prep(void) { return -ENOSYS; }
-
- /* Possible settings for the migrate_page() method in address_operations */
- #define migrate_page NULL
- #define fail_migrate_page NULL
-
- #endif /* CONFIG_MIGRATION */
- #endif /* _LINUX_MIGRATE_H */
-