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- #ifndef _LINUX_MIGRATE_H
- #define _LINUX_MIGRATE_H
- #include <linux/mm.h>
- typedef struct page *new_page_t(struct page *, unsigned long private, int **);
- /* Check if a vma is migratable */
- static inline int vma_migratable(struct vm_area_struct *vma)
- {
- if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
- return 0;
- return 1;
- }
- #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 address_space *,
- struct page *, struct page *);
- extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long);
- extern int fail_migrate_page(struct address_space *,
- struct page *, struct page *);
- extern int migrate_prep(void);
- extern int migrate_vmas(struct mm_struct *mm,
- const nodemask_t *from, const nodemask_t *to,
- unsigned long flags);
- #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, new_page_t x,
- unsigned long private) { 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; }
- static inline int migrate_vmas(struct mm_struct *mm,
- const nodemask_t *from, const nodemask_t *to,
- unsigned long flags)
- {
- 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 */
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