1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/config.h> 5 #include <linux/mm.h> 6 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 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 *); 18 19 extern int migrate_prep(void); 20 21 #else 22 23 static inline int isolate_lru_page(struct page *p, struct list_head *list) 24 { return -ENOSYS; } 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; } 28 29 static inline int migrate_prep(void) { return -ENOSYS; } 30 31 /* Possible settings for the migrate_page() method in address_operations */ 32 #define migrate_page NULL 33 #define fail_migrate_page NULL 34 35 #endif /* CONFIG_MIGRATION */ 36 #endif /* _LINUX_MIGRATE_H */ 37