Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_MIGRATE_H
2#define _LINUX_MIGRATE_H
3
4#include <linux/mm.h>
5#include <linux/mempolicy.h>
6
7typedef struct page *new_page_t(struct page *, unsigned long private, int **);
8
9#ifdef CONFIG_MIGRATION
10#define PAGE_MIGRATION 1
11
12extern void putback_lru_pages(struct list_head *l);
13extern int migrate_page(struct address_space *,
14 struct page *, struct page *);
15extern int migrate_pages(struct list_head *l, new_page_t x,
16 unsigned long private, int offlining);
17extern int migrate_huge_pages(struct list_head *l, new_page_t x,
18 unsigned long private, int offlining);
19
20extern int fail_migrate_page(struct address_space *,
21 struct page *, struct page *);
22
23extern int migrate_prep(void);
24extern int migrate_prep_local(void);
25extern int migrate_vmas(struct mm_struct *mm,
26 const nodemask_t *from, const nodemask_t *to,
27 unsigned long flags);
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);
31#else
32#define PAGE_MIGRATION 0
33
34static inline void putback_lru_pages(struct list_head *l) {}
35static inline int migrate_pages(struct list_head *l, new_page_t x,
36 unsigned long private, int offlining) { return -ENOSYS; }
37static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
38 unsigned long private, int offlining) { return -ENOSYS; }
39
40static inline int migrate_prep(void) { return -ENOSYS; }
41static inline int migrate_prep_local(void) { return -ENOSYS; }
42
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
50static inline void migrate_page_copy(struct page *newpage,
51 struct page *page) {}
52
53static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
54 struct page *newpage, struct page *page)
55{
56 return -ENOSYS;
57}
58
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 */