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