[PATCH] device-mapper: make lock_fs optional

Devices only needs syncing when creating snapshots, so make this optional when
suspending a device.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/dm-ioctl.c

@@ -700,7 +700,7 @@ static int do_suspend(struct dm_ioctl *param)
 		return -ENXIO;
 
 	if (!dm_suspended(md))
-		r = dm_suspend(md);
+		r = dm_suspend(md, 1);
 
 	if (!r)
 		r = __dev_status(md, param);
@@ -738,7 +738,7 @@ static int do_resume(struct dm_ioctl *param)
 	if (new_map) {
 		/* Suspend if it isn't already suspended */
 		if (!dm_suspended(md))
-			dm_suspend(md);
+			dm_suspend(md, 1);
 
 		r = dm_swap_table(md, new_map);
 		if (r) {