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 18 extern int fail_migrate_page(struct address_space *, 19 struct page *, struct page *); 20 21 extern int migrate_prep(void); 22 extern int migrate_prep_local(void); 23 extern int migrate_vmas(struct mm_struct *mm, 24 const nodemask_t *from, const nodemask_t *to, 25 unsigned long flags); 26 #else 27 #define PAGE_MIGRATION 0 28 29 static inline void putback_lru_pages(struct list_head *l) {} 30 static inline int migrate_pages(struct list_head *l, new_page_t x, 31 unsigned long private, int offlining) { return -ENOSYS; } 32 33 static inline int migrate_prep(void) { return -ENOSYS; } 34 static inline int migrate_prep_local(void) { return -ENOSYS; } 35 36 static inline int migrate_vmas(struct mm_struct *mm, 37 const nodemask_t *from, const nodemask_t *to, 38 unsigned long flags) 39 { 40 return -ENOSYS; 41 } 42 43 /* Possible settings for the migrate_page() method in address_operations */ 44 #define migrate_page NULL 45 #define fail_migrate_page NULL 46 47 #endif /* CONFIG_MIGRATION */ 48 #endif /* _LINUX_MIGRATE_H */ 49