include/linux/migrate.h

   1 #ifndef _LINUX_MIGRATE_H
   2 #define _LINUX_MIGRATE_H
   3
   4 #include <linux/config.h>
   5 #include <linux/mm.h>
   6
   7 #ifdef CONFIG_MIGRATION
   8 extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
   9 extern int putback_lru_pages(struct list_head *l);
  10 extern int migrate_page(struct page *, struct page *);
  11 extern void migrate_page_copy(struct page *, struct page *);
  12 extern int migrate_page_remove_references(struct page *, struct page *, int);
  13 extern int migrate_pages(struct list_head *l, struct list_head *t,
  14                 struct list_head *moved, struct list_head *failed);
  15 int migrate_pages_to(struct list_head *pagelist,
  16                         struct vm_area_struct *vma, int dest);
  17 extern int fail_migrate_page(struct page *, struct page *);
  18
  19 extern int migrate_prep(void);
  20
  21 #else
  22
  23 static inline int isolate_lru_page(struct page *p, struct list_head *list)
  24                                         { return -ENOSYS; }
  25 static inline int putback_lru_pages(struct list_head *l) { return 0; }
  26 static inline int migrate_pages(struct list_head *l, struct list_head *t,
  27         struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
  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 */