1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/mm.h> 5 #include <linux/mempolicy.h> 6 #include <linux/migrate_mode.h> 7 8 typedef struct page *new_page_t(struct page *, unsigned long private, int **); 9 10 #ifdef CONFIG_MIGRATION 11 #define PAGE_MIGRATION 1 12 13 extern void putback_lru_pages(struct list_head *l); 14 extern int migrate_page(struct address_space *, 15 struct page *, struct page *, enum migrate_mode); 16 extern int migrate_pages(struct list_head *l, new_page_t x, 17 unsigned long private, bool offlining, 18 enum migrate_mode mode); 19 extern int migrate_huge_pages(struct list_head *l, new_page_t x, 20 unsigned long private, bool offlining, 21 enum migrate_mode mode); 22 23 extern int fail_migrate_page(struct address_space *, 24 struct page *, struct page *); 25 26 extern int migrate_prep(void); 27 extern int migrate_prep_local(void); 28 extern int migrate_vmas(struct mm_struct *mm, 29 const nodemask_t *from, const nodemask_t *to, 30 unsigned long flags); 31 extern void migrate_page_copy(struct page *newpage, struct page *page); 32 extern int migrate_huge_page_move_mapping(struct address_space *mapping, 33 struct page *newpage, struct page *page); 34 #else 35 #define PAGE_MIGRATION 0 36 37 static inline void putback_lru_pages(struct list_head *l) {} 38 static inline int migrate_pages(struct list_head *l, new_page_t x, 39 unsigned long private, bool offlining, 40 enum migrate_mode mode) { return -ENOSYS; } 41 static inline int migrate_huge_pages(struct list_head *l, new_page_t x, 42 unsigned long private, bool offlining, 43 enum migrate_mode mode) { return -ENOSYS; } 44 45 static inline int migrate_prep(void) { return -ENOSYS; } 46 static inline int migrate_prep_local(void) { return -ENOSYS; } 47 48 static inline int migrate_vmas(struct mm_struct *mm, 49 const nodemask_t *from, const nodemask_t *to, 50 unsigned long flags) 51 { 52 return -ENOSYS; 53 } 54 55 static inline void migrate_page_copy(struct page *newpage, 56 struct page *page) {} 57 58 static inline int migrate_huge_page_move_mapping(struct address_space *mapping, 59 struct page *newpage, struct page *page) 60 { 61 return -ENOSYS; 62 } 63 64 /* Possible settings for the migrate_page() method in address_operations */ 65 #define migrate_page NULL 66 #define fail_migrate_page NULL 67 68 #endif /* CONFIG_MIGRATION */ 69 #endif /* _LINUX_MIGRATE_H */ 70