[net-next-2.6.git] / include / linux / migrate.h

#ifndef _LINUX_MIGRATE_H
#define _LINUX_MIGRATE_H

#include <linux/mm.h>
#include <linux/mempolicy.h>

typedef struct page *new_page_t(struct page *, unsigned long private, int **);

#ifdef CONFIG_MIGRATION
#define PAGE_MIGRATION 1

extern void putback_lru_pages(struct list_head *l);
extern int migrate_page(struct address_space *,
			struct page *, struct page *);
extern int migrate_pages(struct list_head *l, new_page_t x,
			unsigned long private, int offlining);
extern int migrate_huge_pages(struct list_head *l, new_page_t x,
			unsigned long private, int offlining);

extern int fail_migrate_page(struct address_space *,
			struct page *, struct page *);

extern int migrate_prep(void);
extern int migrate_prep_local(void);
extern int migrate_vmas(struct mm_struct *mm,
		const nodemask_t *from, const nodemask_t *to,
		unsigned long flags);
extern void migrate_page_copy(struct page *newpage, struct page *page);
extern int migrate_huge_page_move_mapping(struct address_space *mapping,
				  struct page *newpage, struct page *page);
#else
#define PAGE_MIGRATION 0

static inline void putback_lru_pages(struct list_head *l) {}
static inline int migrate_pages(struct list_head *l, new_page_t x,
		unsigned long private, int offlining) { return -ENOSYS; }
static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
		unsigned long private, int offlining) { return -ENOSYS; }

static inline int migrate_prep(void) { return -ENOSYS; }
static inline int migrate_prep_local(void) { return -ENOSYS; }

static inline int migrate_vmas(struct mm_struct *mm,
		const nodemask_t *from, const nodemask_t *to,
		unsigned long flags)
{
	return -ENOSYS;
}

static inline void migrate_page_copy(struct page *newpage,
				     struct page *page) {}

static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
				  struct page *newpage, struct page *page)
{
	return -ENOSYS;
}

/* Possible settings for the migrate_page() method in address_operations */
#define migrate_page NULL
#define fail_migrate_page NULL

#endif /* CONFIG_MIGRATION */
#endif /* _LINUX_MIGRATE_H */
Commit	Line	Data
b20a3503 CL	1	#ifndef _LINUX_MIGRATE_H
	2	#define _LINUX_MIGRATE_H
	3
b20a3503	4	#include <linux/mm.h>
906e0be1	5	#include <linux/mempolicy.h>
b20a3503	6
742755a1	7	typedef struct page new_page_t(struct page , unsigned long private, int **);
95a402c3	8
906e0be1	9	#ifdef CONFIG_MIGRATION
64cdd548 KM	10	#define PAGE_MIGRATION 1
64cdd548 KM	11
e13861d8	12	extern void putback_lru_pages(struct list_head *l);
2d1db3b1 CL	13	extern int migrate_page(struct address_space *,
2d1db3b1 CL	14	struct page , struct page );
62b61f61 HD	15	extern int migrate_pages(struct list_head *l, new_page_t x,
62b61f61 HD	16	unsigned long private, int offlining);
290408d4 NH	17	extern int migrate_huge_pages(struct list_head *l, new_page_t x,
290408d4 NH	18	unsigned long private, int offlining);
95a402c3	19
2d1db3b1 CL	20	extern int fail_migrate_page(struct address_space *,
2d1db3b1 CL	21	struct page , struct page );
b20a3503 CL	22
b20a3503 CL	23	extern int migrate_prep(void);
748446bb	24	extern int migrate_prep_local(void);
7b2259b3 CL	25	extern int migrate_vmas(struct mm_struct *mm,
	26	const nodemask_t from, const nodemask_t to,
	27	unsigned long flags);
290408d4 NH	28	extern void migrate_page_copy(struct page newpage, struct page page);
	29	extern int migrate_huge_page_move_mapping(struct address_space *mapping,
	30	struct page newpage, struct page page);
b20a3503	31	#else
64cdd548 KM	32	#define PAGE_MIGRATION 0
64cdd548 KM	33
e13861d8	34	static inline void putback_lru_pages(struct list_head *l) {}
95a402c3	35	static inline int migrate_pages(struct list_head *l, new_page_t x,
62b61f61	36	unsigned long private, int offlining) { return -ENOSYS; }
290408d4 NH	37	static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
290408d4 NH	38	unsigned long private, int offlining) { return -ENOSYS; }
9bf9e89c	39
b20a3503	40	static inline int migrate_prep(void) { return -ENOSYS; }
748446bb	41	static inline int migrate_prep_local(void) { return -ENOSYS; }
b20a3503	42
7b2259b3 CL	43	static 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
290408d4 NH	50	static inline void migrate_page_copy(struct page *newpage,
	51	struct page *page) {}
	52
6f39ce05	53	static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
290408d4 NH	54	struct page newpage, struct page page)
	55	{
	56	return -ENOSYS;
	57	}
	58
b20a3503 CL	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 */