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 extern int putback_lru_pages(struct list_head *l); 11 extern int migrate_page(struct address_space *, 12 struct page *, struct page *); 13 extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long); 14 15 extern int fail_migrate_page(struct address_space *, 16 struct page *, struct page *); 17 18 extern int migrate_prep(void); 19 extern int migrate_vmas(struct mm_struct *mm, 20 const nodemask_t *from, const nodemask_t *to, 21 unsigned long flags); 22 #else 23 static inline int putback_lru_pages(struct list_head *l) { return 0; } 24 static inline int migrate_pages(struct list_head *l, new_page_t x, 25 unsigned long private) { return -ENOSYS; } 26 27 static inline int migrate_pages_to(struct list_head *pagelist, 28 struct vm_area_struct *vma, int dest) { return 0; } 29 30 static inline int migrate_prep(void) { return -ENOSYS; } 31 32 static inline int migrate_vmas(struct mm_struct *mm, 33 const nodemask_t *from, const nodemask_t *to, 34 unsigned long flags) 35 { 36 return -ENOSYS; 37 } 38 39 /* Possible settings for the migrate_page() method in address_operations */ 40 #define migrate_page NULL 41 #define fail_migrate_page NULL 42 43 #endif /* CONFIG_MIGRATION */ 44 #endif /* _LINUX_MIGRATE_H */ 45