do_remount(): pull touch_mnt_namespace() up

... and don't bother with dropping and regaining vfsmount_lock

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namespace.c b/fs/namespace.c
index 17ff1470b4052d78ed1ed836d6dfaf81155501f2..3ee6e59ead55a9ca2398a30b86f347315532a8b5 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1849,14 +1849,10 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
                br_write_lock(&vfsmount_lock);
                mnt_flags |= mnt->mnt.mnt_flags & MNT_PROPAGATION_MASK;
                mnt->mnt.mnt_flags = mnt_flags;
-               br_write_unlock(&vfsmount_lock);
-       }
-       up_write(&sb->s_umount);
-       if (!err) {
-               br_write_lock(&vfsmount_lock);
                touch_mnt_namespace(mnt->mnt_ns);
                br_write_unlock(&vfsmount_lock);
        }
+       up_write(&sb->s_umount);
        return err;
 }