2 files changed, 12 insertions, 1 deletions

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 5dba23a1c0d0..48148e0cdbd1 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -16,7 +16,9 @@ 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)
@@ -30,6 +32,13 @@ static inline int migrate_pages_to(struct list_head *pagelist,
 
 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
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 71c5d2f667ed..a929ea197e48 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -206,6 +206,8 @@ struct vm_operations_struct {
         int (*set_policy)(struct vm_area_struct *vma, struct mempolicy *new);
         struct mempolicy *(*get_policy)(struct vm_area_struct *vma,
                                         unsigned long addr);
+        int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from,
+                const nodemask_t *to, unsigned long flags);
 #endif
 };