This patch turns on barriers by default for ext3.  mount -o barrier=0
will turn them off.  Based on a patch from Chris Mason in the SuSE tree.
Signed-off-by: NChris Mason <chris.mason@oracle.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NEric Sandeen <sandeen@redhat.com>
Acked-by: NJan Kara <jack@suse.cz>
Acked-by: NJeff Mahoney <jeffm@suse.com>
Acked-by: NTed Ts'o <tytso@mit.edu>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>