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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 7b2a2d4a18fffac3c4872021529b0657896db788 / . / include / linux / migrate.h
blob: 9d1c159e242704c077fe91de3b5d5a1fdace9413 [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>
Andrew Morton6536e312012-01-20 14:33:53 -0800[diff] [blame]6#include <linux/migrate_mode.h>
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]7
Christoph Lameter742755a2006-06-23 02:03:55 -0700[diff] [blame]8typedef struct page *new_page_t(struct page *, unsigned long private, int **);
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]9
Mel Gorman7b2a2d42012-10-19 14:07:31 +0100[diff] [blame^]10enum migrate_reason {
11 MR_COMPACTION,
12 MR_MEMORY_FAILURE,
13 MR_MEMORY_HOTPLUG,
14 MR_SYSCALL, /* also applies to cpusets */
15 MR_MEMPOLICY_MBIND,
16 MR_CMA
17};
18
Christoph Lameter906e0be2007-05-06 14:50:20 -0700[diff] [blame]19#ifdef CONFIG_MIGRATION
KOSAKI Motohiro64cdd542009-01-06 14:39:16 -0800[diff] [blame]20
Minchan Kime13861d2010-05-24 14:31:59 -0700[diff] [blame]21extern void putback_lru_pages(struct list_head *l);
Christoph Lameter2d1db3b2006-06-23 02:03:33 -0700[diff] [blame]22extern int migrate_page(struct address_space *,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800[diff] [blame]23 struct page *, struct page *, enum migrate_mode);
Hugh Dickins62b61f62009-12-14 17:59:33 -0800[diff] [blame]24extern int migrate_pages(struct list_head *l, new_page_t x,
Mel Gorman7f0f2492011-01-13 15:45:58 -0800[diff] [blame]25 unsigned long private, bool offlining,
Mel Gorman7b2a2d42012-10-19 14:07:31 +0100[diff] [blame^]26 enum migrate_mode mode, int reason);
Aneesh Kumar K.V189ebff2012-07-31 16:42:06 -0700[diff] [blame]27extern int migrate_huge_page(struct page *, new_page_t x,
Mel Gorman7f0f2492011-01-13 15:45:58 -0800[diff] [blame]28 unsigned long private, bool offlining,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800[diff] [blame]29 enum migrate_mode mode);
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]30
Christoph Lameter2d1db3b2006-06-23 02:03:33 -0700[diff] [blame]31extern int fail_migrate_page(struct address_space *,
32 struct page *, struct page *);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]33
34extern int migrate_prep(void);
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]35extern int migrate_prep_local(void);
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]36extern int migrate_vmas(struct mm_struct *mm,
37 const nodemask_t *from, const nodemask_t *to,
38 unsigned long flags);
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]39extern void migrate_page_copy(struct page *newpage, struct page *page);
40extern int migrate_huge_page_move_mapping(struct address_space *mapping,
41 struct page *newpage, struct page *page);
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]42#else
KOSAKI Motohiro64cdd542009-01-06 14:39:16 -0800[diff] [blame]43
Minchan Kime13861d2010-05-24 14:31:59 -0700[diff] [blame]44static inline void putback_lru_pages(struct list_head *l) {}
Christoph Lameter95a402c2006-06-23 02:03:53 -0700[diff] [blame]45static inline int migrate_pages(struct list_head *l, new_page_t x,
Mel Gorman7f0f2492011-01-13 15:45:58 -0800[diff] [blame]46 unsigned long private, bool offlining,
Mel Gorman7b2a2d42012-10-19 14:07:31 +0100[diff] [blame^]47 enum migrate_mode mode, int reason) { return -ENOSYS; }
Aneesh Kumar K.V189ebff2012-07-31 16:42:06 -0700[diff] [blame]48static inline int migrate_huge_page(struct page *page, new_page_t x,
Mel Gorman7f0f2492011-01-13 15:45:58 -0800[diff] [blame]49 unsigned long private, bool offlining,
Mel Gormana6bc32b2012-01-12 17:19:43 -0800[diff] [blame]50 enum migrate_mode mode) { return -ENOSYS; }
Christoph Lameter9bf9e892006-03-31 02:29:56 -0800[diff] [blame]51
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]52static inline int migrate_prep(void) { return -ENOSYS; }
Mel Gorman748446b2010-05-24 14:32:27 -0700[diff] [blame]53static inline int migrate_prep_local(void) { return -ENOSYS; }
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]54
Christoph Lameter7b2259b2006-06-25 05:46:48 -0700[diff] [blame]55static inline int migrate_vmas(struct mm_struct *mm,
56 const nodemask_t *from, const nodemask_t *to,
57 unsigned long flags)
58{
59 return -ENOSYS;
60}
61
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]62static inline void migrate_page_copy(struct page *newpage,
63 struct page *page) {}
64
Naoya Horiguchi6f39ce02010-09-30 11:54:51 +0900[diff] [blame]65static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
Naoya Horiguchi290408d2010-09-08 10:19:35 +0900[diff] [blame]66 struct page *newpage, struct page *page)
67{
68 return -ENOSYS;
69}
70
Christoph Lameterb20a3502006-03-22 00:09:12 -0800[diff] [blame]71/* Possible settings for the migrate_page() method in address_operations */
72#define migrate_page NULL
73#define fail_migrate_page NULL
74
75#endif /* CONFIG_MIGRATION */
76#endif /* _LINUX_MIGRATE_H */