b8a052d016
Use a separate lock to protect the orphan list, so we can stop overloading the use of lock_super(). Port of ext4 commit 3b9d4ed26680771295d904a6b83e88e620780893 by Theodore Ts'o <tytso@mit.edu>. CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>