1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/mm.h> 5 #include <linux/mempolicy.h> 6 7 typedef struct page *new_page_t(struct page *, unsigned long private, int **); 8 9 #ifdef CONFIG_MIGRATION 10 #define PAGE_MIGRATION 1 11 12 extern void putback_lru_pages(struct list_head *l); 13 extern int migrate_page(struct address_space *, 14 struct page *, struct page *); 15 extern int migrate_pages(struct list_head *l, new_page_t x, 16 unsigned long private, int offlining); 17 extern int migrate_huge_pages(struct list_head *l, new_page_t x, 18 unsigned long private, int offlining); 19 20 extern int fail_migrate_page(struct address_space *, 21 struct page *, struct page *); 22 23 extern int migrate_prep(void); 24 extern int migrate_prep_local(void); 25 extern int migrate_vmas(struct mm_struct *mm, 26 const nodemask_t *from, const nodemask_t *to, 27 unsigned long flags); 28 extern void migrate_page_copy(struct page *newpage, struct page *page); 29 extern int migrate_huge_page_move_mapping(struct address_space *mapping, 30 struct page *newpage, struct page *page); 31 #else 32 #define PAGE_MIGRATION 0 33 34 static inline void putback_lru_pages(struct list_head *l) {} 35 static inline int migrate_pages(struct list_head *l, new_page_t x, 36 unsigned long private, int offlining) { return -ENOSYS; } 37 static inline int migrate_huge_pages(struct list_head *l, new_page_t x, 38 unsigned long private, int offlining) { return -ENOSYS; } 39 40 static inline int migrate_prep(void) { return -ENOSYS; } 41 static inline int migrate_prep_local(void) { return -ENOSYS; } 42 43 static inline int migrate_vmas(struct mm_struct *mm, 44 const nodemask_t *from, const nodemask_t *to, 45 unsigned long flags) 46 { 47 return -ENOSYS; 48 } 49 50 static inline void migrate_page_copy(struct page *newpage, 51 struct page *page) {} 52 53 static inline int migrate_huge_page_move_mapping(struct address_space *mapping, 54 struct page *newpage, struct page *page) 55 { 56 return -ENOSYS; 57 } 58 59 /* Possible settings for the migrate_page() method in address_operations */ 60 #define migrate_page NULL 61 #define fail_migrate_page NULL 62 63 #endif /* CONFIG_MIGRATION */ 64 #endif /* _LINUX_MIGRATE_H */ 65