1 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 7238231b8dd4..085527fb8261 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -14,6 +14,8 @@ 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, int offlining);
+extern int migrate_huge_pages(struct list_head *l, new_page_t x,
+                        unsigned long private, int offlining);
 
 extern int fail_migrate_page(struct address_space *,
                         struct page *, struct page *);
@@ -23,12 +25,17 @@ 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, int offlining) { return -ENOSYS; }
+static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
+                unsigned long private, int offlining) { return -ENOSYS; }
 
 static inline int migrate_prep(void) { return -ENOSYS; }
 static inline int migrate_prep_local(void) { return -ENOSYS; }
@@ -40,6 +47,15 @@ static inline int migrate_vmas(struct mm_struct *mm,
         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