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gerrit-public.fairphone.software / kernel / msm-4.9 / f91e2c3bd427239c198351f44814dd39db91afe0 / . / include / linux / migrate.h
blob: 085527fb82610065e3b8566372780cd6910c2cf3 [file] [log] [blame]
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]1#ifndef _LINUX_MIGRATE_H
2#define _LINUX_MIGRATE_H
3
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]4#include <linux/mm.h>
Christoph Lameter906e0be2007-05-06 14:50:20 -0700[diff] [blame]5#include <linux/mempolicy.h>
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]6
Christoph Lameter742755a2006-06-23 02:03:55 -0700[diff] [blame]7typedef struct page *new_page_t(struct page *, unsigned long private, int **);
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]8
Christoph Lameter906e0be2007-05-06 14:50:20 -0700[diff] [blame]9#ifdef CONFIG_MIGRATION
KOSAKI Motohiro64cdd542009-01-06 14:39:16 -0800[diff] [blame]10#define PAGE_MIGRATION 1
11
Minchan Kime13861d2010-05-24 14:31:59 -0700[diff] [blame]12extern void putback_lru_pages(struct list_head *l);
Christoph Lameter2d1db3b2006-06-23 02:03:33 -0700[diff] [blame]13extern int migrate_page(struct address_space *,
14 struct page *, struct page *);
Hugh Dickins62b61f62009-12-14 17:59:33 -0800[diff] [blame]15extern int migrate_pages(struct list_head *l, new_page_t x,
16 unsigned long private, int offlining);
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]17extern int migrate_huge_pages(struct list_head *l, new_page_t x,
18 unsigned long private, int offlining);
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]19
Christoph Lameter2d1db3b2006-06-23 02:03:33 -0700[diff] [blame]20extern int fail_migrate_page(struct address_space *,
21 struct page *, struct page *);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]22
23extern int migrate_prep(void);
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]24extern int migrate_prep_local(void);
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]25extern int migrate_vmas(struct mm_struct *mm,
26 const nodemask_t *from, const nodemask_t *to,
27 unsigned long flags);
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]28extern void migrate_page_copy(struct page *newpage, struct page *page);
29extern int migrate_huge_page_move_mapping(struct address_space *mapping,
30 struct page *newpage, struct page *page);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]31#else
KOSAKI Motohiro64cdd542009-01-06 14:39:16 -0800[diff] [blame]32#define PAGE_MIGRATION 0
33
Minchan Kime13861d2010-05-24 14:31:59 -0700[diff] [blame]34static inline void putback_lru_pages(struct list_head *l) {}
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]35static inline int migrate_pages(struct list_head *l, new_page_t x,
Hugh Dickins62b61f62009-12-14 17:59:33 -0800[diff] [blame]36 unsigned long private, int offlining) { return -ENOSYS; }
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]37static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
38 unsigned long private, int offlining) { return -ENOSYS; }
Christoph Lameter9bf9e892006-03-31 02:29:56 -0800[diff] [blame]39
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]40static inline int migrate_prep(void) { return -ENOSYS; }
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]41static inline int migrate_prep_local(void) { return -ENOSYS; }
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]42
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]43static inline int migrate_vmas(struct mm_struct *mm,
44 const nodemask_t *from, const nodemask_t *to,
45 unsigned long flags)
46{
47 return -ENOSYS;
48}
49
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]50static inline void migrate_page_copy(struct page *newpage,
51 struct page *page) {}
52
Naoya Horiguchi6f39ce02010-09-30 11:54:51 +0900[diff] [blame]53static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]54 struct page *newpage, struct page *page)
55{
56 return -ENOSYS;
57}
58
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]59/* Possible settings for the migrate_page() method in address_operations */
60#define migrate_page NULL
61#define fail_migrate_page NULL
62
63#endif /* CONFIG_MIGRATION */
64#endif /* _LINUX_MIGRATE_H */