1 #ifndef _LINUX_MIGRATE_H 2 #define _LINUX_MIGRATE_H 3 4 #include <linux/mm.h> 5 6 typedef struct page *new_page_t(struct page *, unsigned long private, int **); 7 8 /* Check if a vma is migratable */ 9 static inline int vma_migratable(struct vm_area_struct *vma) 10 { 11 if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) 12 return 0; 13 return 1; 14 } 15 16 #ifdef CONFIG_MIGRATION 17 extern int isolate_lru_page(struct page *p, struct list_head *pagelist); 18 extern int putback_lru_pages(struct list_head *l); 19 extern int migrate_page(struct address_space *, 20 struct page *, struct page *); 21 extern int migrate_pages(struct list_head *l, new_page_t x, unsigned long); 22 23 extern int fail_migrate_page(struct address_space *, 24 struct page *, struct page *); 25 26 extern int migrate_prep(void); 27 extern int migrate_vmas(struct mm_struct *mm, 28 const nodemask_t *from, const nodemask_t *to, 29 unsigned long flags); 30 #else 31 32 static inline int isolate_lru_page(struct page *p, struct list_head *list) 33 { return -ENOSYS; } 34 static inline int putback_lru_pages(struct list_head *l) { return 0; } 35 static inline int migrate_pages(struct list_head *l, new_page_t x, 36 unsigned long private) { return -ENOSYS; } 37 38 static inline int migrate_pages_to(struct list_head *pagelist, 39 struct vm_area_struct *vma, int dest) { return 0; } 40 41 static inline int migrate_prep(void) { return -ENOSYS; } 42 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 50 /* Possible settings for the migrate_page() method in address_operations */ 51 #define migrate_page NULL 52 #define fail_migrate_page NULL 53 54 #endif /* CONFIG_MIGRATION */ 55 #endif /* _LINUX_MIGRATE_H */ 56