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gerrit-public.fairphone.software / kernel / msm-4.9 / e38018be3e7c03dd7e8f4ab0e1d55407cebbf89d / . / include / linux / migrate.h
blob: 7238231b8dd40194e980dad7683c854fd88a6047 [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);
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]17
Christoph Lameter2d1db3b2006-06-23 02:03:33 -0700[diff] [blame]18extern int fail_migrate_page(struct address_space *,
19 struct page *, struct page *);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]20
21extern int migrate_prep(void);
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]22extern int migrate_prep_local(void);
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]23extern int migrate_vmas(struct mm_struct *mm,
24 const nodemask_t *from, const nodemask_t *to,
25 unsigned long flags);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]26#else
KOSAKI Motohiro64cdd542009-01-06 14:39:16 -0800[diff] [blame]27#define PAGE_MIGRATION 0
28
Minchan Kime13861d2010-05-24 14:31:59 -0700[diff] [blame]29static inline void putback_lru_pages(struct list_head *l) {}
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]30static inline int migrate_pages(struct list_head *l, new_page_t x,
Hugh Dickins62b61f62009-12-14 17:59:33 -0800[diff] [blame]31 unsigned long private, int offlining) { return -ENOSYS; }
Christoph Lameter9bf9e892006-03-31 02:29:56 -0800[diff] [blame]32
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]33static inline int migrate_prep(void) { return -ENOSYS; }
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]34static inline int migrate_prep_local(void) { return -ENOSYS; }
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]35
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]36static inline int migrate_vmas(struct mm_struct *mm,
37 const nodemask_t *from, const nodemask_t *to,
38 unsigned long flags)
39{
40 return -ENOSYS;
41}
42
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]43/* Possible settings for the migrate_page() method in address_operations */
44#define migrate_page NULL
45#define fail_migrate_page NULL
46
47#endif /* CONFIG_MIGRATION */
48#endif /* _LINUX_MIGRATE_H */