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Christoph Lameterb20a3502006-03-22 00:09:12 -08001#ifndef _LINUX_MIGRATE_H
2#define _LINUX_MIGRATE_H
3
Christoph Lameterb20a3502006-03-22 00:09:12 -08004#include <linux/mm.h>
5
6#ifdef CONFIG_MIGRATION
7extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
8extern int putback_lru_pages(struct list_head *l);
9extern int migrate_page(struct page *, struct page *);
10extern void migrate_page_copy(struct page *, struct page *);
11extern int migrate_page_remove_references(struct page *, struct page *, int);
12extern int migrate_pages(struct list_head *l, struct list_head *t,
13 struct list_head *moved, struct list_head *failed);
Christoph Lameter9bf9e892006-03-31 02:29:56 -080014extern int migrate_pages_to(struct list_head *pagelist,
Christoph Lameterb20a3502006-03-22 00:09:12 -080015 struct vm_area_struct *vma, int dest);
16extern int fail_migrate_page(struct page *, struct page *);
17
18extern int migrate_prep(void);
19
20#else
21
22static inline int isolate_lru_page(struct page *p, struct list_head *list)
23 { return -ENOSYS; }
24static inline int putback_lru_pages(struct list_head *l) { return 0; }
25static inline int migrate_pages(struct list_head *l, struct list_head *t,
26 struct list_head *moved, struct list_head *failed) { return -ENOSYS; }
27
Christoph Lameter9bf9e892006-03-31 02:29:56 -080028static inline int migrate_pages_to(struct list_head *pagelist,
29 struct vm_area_struct *vma, int dest) { return 0; }
30
Christoph Lameterb20a3502006-03-22 00:09:12 -080031static inline int migrate_prep(void) { return -ENOSYS; }
32
33/* Possible settings for the migrate_page() method in address_operations */
34#define migrate_page NULL
35#define fail_migrate_page NULL
36
37#endif /* CONFIG_MIGRATION */
38#endif /* _LINUX_MIGRATE_H */