Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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, bool offlining,
17 bool sync);
18extern int migrate_huge_pages(struct list_head *l, new_page_t x,
19 unsigned long private, bool offlining,
20 bool sync);
21
22extern int fail_migrate_page(struct address_space *,
23 struct page *, struct page *);
24
25extern int migrate_prep(void);
26extern int migrate_prep_local(void);
27extern int migrate_vmas(struct mm_struct *mm,
28 const nodemask_t *from, const nodemask_t *to,
29 unsigned long flags);
30extern void migrate_page_copy(struct page *newpage, struct page *page);
31extern int migrate_huge_page_move_mapping(struct address_space *mapping,
32 struct page *newpage, struct page *page);
33#else
34#define PAGE_MIGRATION 0
35
36static inline void putback_lru_pages(struct list_head *l) {}
37static inline int migrate_pages(struct list_head *l, new_page_t x,
38 unsigned long private, bool offlining,
39 bool sync) { return -ENOSYS; }
40static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
41 unsigned long private, bool offlining,
42 bool sync) { return -ENOSYS; }
43
44static inline int migrate_prep(void) { return -ENOSYS; }
45static inline int migrate_prep_local(void) { return -ENOSYS; }
46
47static inline int migrate_vmas(struct mm_struct *mm,
48 const nodemask_t *from, const nodemask_t *to,
49 unsigned long flags)
50{
51 return -ENOSYS;
52}
53
54static inline void migrate_page_copy(struct page *newpage,
55 struct page *page) {}
56
57static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
58 struct page *newpage, struct page *page)
59{
60 return -ENOSYS;
61}
62
63/* Possible settings for the migrate_page() method in address_operations */
64#define migrate_page NULL
65#define fail_migrate_page NULL
66
67#endif /* CONFIG_MIGRATION */
68#endif /* _LINUX_MIGRATE_H */