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, bool offlining, 17 bool sync); 18 extern int migrate_huge_pages(struct list_head *l, new_page_t x, 19 unsigned long private, bool offlining, 20 bool sync); 21 22 extern int fail_migrate_page(struct address_space *, 23 struct page *, struct page *); 24 25 extern int migrate_prep(void); 26 extern int migrate_prep_local(void); 27 extern int migrate_vmas(struct mm_struct *mm, 28 const nodemask_t *from, const nodemask_t *to, 29 unsigned long flags); 30 extern void migrate_page_copy(struct page *newpage, struct page *page); 31 extern int migrate_huge_page_move_mapping(struct address_space *mapping, 32 struct page *newpage, struct page *page); 33 #else 34 #define PAGE_MIGRATION 0 35 36 static inline void putback_lru_pages(struct list_head *l) {} 37 static inline int migrate_pages(struct list_head *l, new_page_t x, 38 unsigned long private, bool offlining, 39 bool sync) { return -ENOSYS; } 40 static inline int migrate_huge_pages(struct list_head *l, new_page_t x, 41 unsigned long private, bool offlining, 42 bool sync) { return -ENOSYS; } 43 44 static inline int migrate_prep(void) { return -ENOSYS; } 45 static inline int migrate_prep_local(void) { return -ENOSYS; } 46 47 static inline int migrate_vmas(struct mm_struct *mm, 48 const nodemask_t *from, const nodemask_t *to, 49 unsigned long flags) 50 { 51 return -ENOSYS; 52 } 53 54 static inline void migrate_page_copy(struct page *newpage, 55 struct page *page) {} 56 57 static inline int migrate_huge_page_move_mapping(struct address_space *mapping, 58 struct page *newpage, struct page *page) 59 { 60 return -ENOSYS; 61 } 62 63 /* Possible settings for the migrate_page() method in address_operations */ 64 #define migrate_page NULL 65 #define fail_migrate_page NULL 66 67 #endif /* CONFIG_MIGRATION */ 68 #endif /* _LINUX_MIGRATE_H */ 69