1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/mm.h> 5 6 #ifdef CONFIG_MIGRATION 7 extern int isolate_lru_page(struct page *p, struct list_head *pagelist); 8 extern int putback_lru_pages(struct list_head *l); 9 extern int migrate_page(struct page *, struct page *); 10 extern void migrate_page_copy(struct page *, struct page *); 11 extern int migrate_page_remove_references(struct page *, struct page *, int); 12 extern int migrate_pages(struct list_head *l, struct list_head *t, 13 struct list_head *moved, struct list_head *failed); 14 extern int migrate_pages_to(struct list_head *pagelist, 15 struct vm_area_struct *vma, int dest); 16 extern int fail_migrate_page(struct page *, struct page *); 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; } 25 static inline int migrate_pages(struct list_head *l, struct list_head *t, 26 struct list_head *moved, struct list_head *failed) { return -ENOSYS; } 27 28 static inline int migrate_pages_to(struct list_head *pagelist, 29 struct vm_area_struct *vma, int dest) { return 0; } 30 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 */ 39