1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/mm.h> 5 6 typedef struct page *new_page_t(struct page *, unsigned long private, int **); 7 8 #ifdef CONFIG_MIGRATION 9 extern int isolate_lru_page(struct page *p, struct list_head *pagelist); 10 extern int putback_lru_pages(struct list_head *l); 11 extern int migrate_page(struct address_space *, 12 struct page *, struct page *); 13 extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long); 14 15 extern int fail_migrate_page(struct address_space *, 16 struct page *, struct page *); 17 18 extern int migrate_prep(void); 19 extern int migrate_vmas(struct mm_struct *mm, 20 const nodemask_t *from, const nodemask_t *to, 21 unsigned long flags); 22 #else 23 24 static inline int isolate_lru_page(struct page *p, struct list_head *list) 25 { return -ENOSYS; } 26 static inline int putback_lru_pages(struct list_head *l) { return 0; } 27 static inline int migrate_pages(struct list_head *l, new_page_t x, 28 unsigned long private) { return -ENOSYS; } 29 30 static inline int migrate_pages_to(struct list_head *pagelist, 31 struct vm_area_struct *vma, int dest) { return 0; } 32 33 static inline int migrate_prep(void) { return -ENOSYS; } 34 35 static inline int migrate_vmas(struct mm_struct *mm, 36 const nodemask_t *from, const nodemask_t *to, 37 unsigned long flags) 38 { 39 return -ENOSYS; 40 } 41 42 /* Possible settings for the migrate_page() method in address_operations */ 43 #define migrate_page NULL 44 #define fail_migrate_page NULL 45 46 #endif /* CONFIG_MIGRATION */ 47 #endif /* _LINUX_MIGRATE_H */ 48