page migration: fix wrong comment in address_space_operations.migratepage()

There is no parameter "sync" in address_space_operations->migratepage().
It should be migrate_mode.  And the comment is for MIGRATE_ASYNC.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 99be011..cb771ec 100644 (file)
--- 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);