[deliverable/linux.git] / include / linux / migrate.h

#ifndef _LINUX_MIGRATE_H
#define _LINUX_MIGRATE_H

#include <linux/mm.h>

#ifdef CONFIG_MIGRATION
extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
extern int putback_lru_pages(struct list_head *l);
extern int migrate_page(struct page *, struct page *);
extern int migrate_pages(struct list_head *l, struct list_head *t,
		struct list_head *moved, struct list_head *failed);
extern int migrate_pages_to(struct list_head *pagelist,
			struct vm_area_struct *vma, int dest);
extern int fail_migrate_page(struct page *, struct page *);

extern int migrate_prep(void);

#else

static inline int isolate_lru_page(struct page *p, struct list_head *list)
					{ return -ENOSYS; }
static inline int putback_lru_pages(struct list_head *l) { return 0; }
static inline int migrate_pages(struct list_head *l, struct list_head *t,
	struct list_head *moved, struct list_head *failed) { return -ENOSYS; }

static inline int migrate_pages_to(struct list_head *pagelist,
			struct vm_area_struct *vma, int dest) { return 0; }

static inline int migrate_prep(void) { 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 CL	4	#include <linux/mm.h>
	5
	6	#ifdef CONFIG_MIGRATION
	7	extern int isolate_lru_page(struct page p, struct list_head pagelist);
	8	extern int putback_lru_pages(struct list_head *l);
	9	extern int migrate_page(struct page , struct page );
b20a3503 CL	10	extern int migrate_pages(struct list_head l, struct list_head t,
b20a3503 CL	11	struct list_head moved, struct list_head failed);
9bf9e89c	12	extern int migrate_pages_to(struct list_head *pagelist,
b20a3503 CL	13	struct vm_area_struct *vma, int dest);
	14	extern int fail_migrate_page(struct page , struct page );
	15
	16	extern int migrate_prep(void);
	17
	18	#else
	19
	20	static inline int isolate_lru_page(struct page p, struct list_head list)
	21	{ return -ENOSYS; }
	22	static inline int putback_lru_pages(struct list_head *l) { return 0; }
	23	static inline int migrate_pages(struct list_head l, struct list_head t,
	24	struct list_head moved, struct list_head failed) { return -ENOSYS; }
	25
9bf9e89c CL	26	static inline int migrate_pages_to(struct list_head *pagelist,
	27	struct vm_area_struct *vma, int dest) { return 0; }
	28
b20a3503 CL	29	static inline int migrate_prep(void) { return -ENOSYS; }
	30
	31	/* Possible settings for the migrate_page() method in address_operations */
	32	#define migrate_page NULL
	33	#define fail_migrate_page NULL
	34
	35	#endif /* CONFIG_MIGRATION */
	36	#endif /* _LINUX_MIGRATE_H */