[linux-block.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, bool offlining,
			bool sync);
extern int migrate_huge_pages(struct list_head *l, new_page_t x,
			unsigned long private, bool offlining,
			bool sync);

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, bool offlining,
		bool sync) { return -ENOSYS; }
static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
		unsigned long private, bool offlining,
		bool sync) { 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	15	extern int migrate_pages(struct list_head *l, new_page_t x,
7f0f2496	16	unsigned long private, bool offlining,
77f1fe6b	17	bool sync);
290408d4	18	extern int migrate_huge_pages(struct list_head *l, new_page_t x,
7f0f2496	19	unsigned long private, bool offlining,
77f1fe6b	20	bool sync);
95a402c3	21
2d1db3b1 CL	22	extern int fail_migrate_page(struct address_space *,
2d1db3b1 CL	23	struct page , struct page );
b20a3503 CL	24
b20a3503 CL	25	extern int migrate_prep(void);
748446bb	26	extern int migrate_prep_local(void);
7b2259b3 CL	27	extern int migrate_vmas(struct mm_struct *mm,
	28	const nodemask_t from, const nodemask_t to,
	29	unsigned long flags);
290408d4 NH	30	extern void migrate_page_copy(struct page newpage, struct page page);
	31	extern int migrate_huge_page_move_mapping(struct address_space *mapping,
	32	struct page newpage, struct page page);
b20a3503	33	#else
64cdd548 KM	34	#define PAGE_MIGRATION 0
64cdd548 KM	35
e13861d8	36	static inline void putback_lru_pages(struct list_head *l) {}
95a402c3	37	static inline int migrate_pages(struct list_head *l, new_page_t x,
7f0f2496	38	unsigned long private, bool offlining,
77f1fe6b	39	bool sync) { return -ENOSYS; }
290408d4	40	static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
7f0f2496	41	unsigned long private, bool offlining,
77f1fe6b	42	bool sync) { return -ENOSYS; }
9bf9e89c	43
b20a3503	44	static inline int migrate_prep(void) { return -ENOSYS; }
748446bb	45	static inline int migrate_prep_local(void) { return -ENOSYS; }
b20a3503	46
7b2259b3 CL	47	static 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
290408d4 NH	54	static inline void migrate_page_copy(struct page *newpage,
	55	struct page *page) {}
	56
6f39ce05	57	static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
290408d4 NH	58	struct page newpage, struct page page)
	59	{
	60	return -ENOSYS;
	61	}
	62
b20a3503 CL	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 */