diff --git a/include/linux/fs.h b/include/linux/fs.h
index 99be011e00d..cb771ecc236 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -372,8 +372,8 @@ struct address_space_operations {
 	int (*get_xip_mem)(struct address_space *, pgoff_t, int,
 						void **, unsigned long *);
 	/*
-	 * migrate the contents of a page to the specified target. If sync
-	 * is false, it must not block.
+	 * migrate the contents of a page to the specified target. If
+	 * migrate_mode is MIGRATE_ASYNC, it must not block.
 	 */
 	int (*migratepage) (struct address_space *,
 			struct page *, struct page *, enum migrate_mode);