include/linux/migrate.h

   1 #ifndef _LINUX_MIGRATE_H
   2 #define _LINUX_MIGRATE_H
   3
   4 #include <linux/mm.h>
   5
   6 #ifdef CONFIG_MIGRATION
   7 extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
   8 extern int putback_lru_pages(struct list_head *l);
   9 extern int migrate_page(struct page *, struct page *);
  10 extern int migrate_pages(struct list_head *l, struct list_head *t,
  11                 struct list_head *moved, struct list_head *failed);
  12 extern int migrate_pages_to(struct list_head *pagelist,
  13                         struct vm_area_struct *vma, int dest);
  14 extern int fail_migrate_page(struct page *, struct page *);
  15
  16 extern int migrate_prep(void);
  17
  18 #else
  19
  20 static inline int isolate_lru_page(struct page *p, struct list_head *list)
  21                                         { return -ENOSYS; }
  22 static inline int putback_lru_pages(struct list_head *l) { return 0; }
  23 static inline int migrate_pages(struct list_head *l, struct list_head *t,
  24         struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
  25
  26 static inline int migrate_pages_to(struct list_head *pagelist,
  27                         struct vm_area_struct *vma, int dest) { return 0; }
  28
  29 static inline int migrate_prep(void) { return -ENOSYS; }
  30
  31 /* Possible settings for the migrate_page() method in address_operations */
  32 #define migrate_page NULL
  33 #define fail_migrate_page NULL
  34
  35 #endif /* CONFIG_MIGRATION */
  36 #endif /* _LINUX_MIGRATE_H */