LXR linux/include/linux/migrate.h

   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 int 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, unsigned long);
  16
  17extern int fail_migrate_page(struct address_space *,
  18                        struct page *, struct page *);
  19
  20extern int migrate_prep(void);
  21extern int migrate_vmas(struct mm_struct *mm,
  22                const nodemask_t *from, const nodemask_t *to,
  23                unsigned long flags);
  24#else
  25#define PAGE_MIGRATION 0
  26
  27static inline int putback_lru_pages(struct list_head *l) { return 0; }
  28static inline int migrate_pages(struct list_head *l, new_page_t x,
  29                unsigned long private) { return -ENOSYS; }
  30
  31static inline int migrate_pages_to(struct list_head *pagelist,
  32                        struct vm_area_struct *vma, int dest) { return 0; }
  33
  34static inline int migrate_prep(void) { return -ENOSYS; }
  35
  36static inline int migrate_vmas(struct mm_struct *mm,
  37                const nodemask_t *from, const nodemask_t *to,
  38                unsigned long flags)
  39{
  40        return -ENOSYS;
  41}
  42
  43/* Possible settings for the migrate_page() method in address_operations */
  44#define migrate_page NULL
  45#define fail_migrate_page NULL
  46
  47#endif /* CONFIG_MIGRATION */
  48#endif /* _LINUX_MIGRATE_H */
  49