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-rw-r--r--include/linux/migrate.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
new file mode 100644
index 000000000000..7d09962c3c0b
--- /dev/null
+++ b/include/linux/migrate.h
@@ -0,0 +1,36 @@
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
8extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
9extern int putback_lru_pages(struct list_head *l);
10extern int migrate_page(struct page *, struct page *);
11extern void migrate_page_copy(struct page *, struct page *);
12extern int migrate_page_remove_references(struct page *, struct page *, int);
13extern int migrate_pages(struct list_head *l, struct list_head *t,
14 struct list_head *moved, struct list_head *failed);
15int migrate_pages_to(struct list_head *pagelist,
16 struct vm_area_struct *vma, int dest);
17extern int fail_migrate_page(struct page *, struct page *);
18
19extern int migrate_prep(void);
20
21#else
22
23static inline int isolate_lru_page(struct page *p, struct list_head *list)
24 { return -ENOSYS; }
25static inline int putback_lru_pages(struct list_head *l) { return 0; }
26static inline int migrate_pages(struct list_head *l, struct list_head *t,
27 struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
28
29static 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 */