Make lock_fs optional in dm_suspend().

Index: linux-2.6.14-rc2/drivers/md/dm-ioctl.c
===================================================================
--- linux-2.6.14-rc2.orig/drivers/md/dm-ioctl.c	2005-10-26 20:14:34.000000000 +0100
+++ linux-2.6.14-rc2/drivers/md/dm-ioctl.c	2005-10-26 20:22:53.000000000 +0100
@@ -690,7 +690,7 @@ static int do_suspend(struct dm_ioctl *p
 		return -ENXIO;
 
 	if (!dm_suspended(md))
-		r = dm_suspend(md);
+		r = dm_suspend(md, 1);
 
 	if (!r)
 		r = __dev_status(md, param);
@@ -728,7 +728,7 @@ static int do_resume(struct dm_ioctl *pa
 	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) {
Index: linux-2.6.14-rc2/drivers/md/dm.h
===================================================================
--- linux-2.6.14-rc2.orig/drivers/md/dm.h	2005-10-26 20:14:34.000000000 +0100
+++ linux-2.6.14-rc2/drivers/md/dm.h	2005-10-26 20:22:53.000000000 +0100
@@ -69,7 +69,7 @@ void dm_put(struct mapped_device *md);
 /*
  * A device can still be used while suspended, but I/O is deferred.
  */
-int dm_suspend(struct mapped_device *md);
+int dm_suspend(struct mapped_device *md, int with_lockfs);
 int dm_resume(struct mapped_device *md);
 
 /*
Index: linux-2.6.14-rc2/drivers/md/dm.c
===================================================================
--- linux-2.6.14-rc2.orig/drivers/md/dm.c	2005-10-26 20:21:58.000000000 +0100
+++ linux-2.6.14-rc2/drivers/md/dm.c	2005-10-26 20:22:53.000000000 +0100
@@ -1040,7 +1040,7 @@ static void unlock_fs(struct mapped_devi
  * dm_bind_table, dm_suspend must be called to flush any in
  * flight bios and ensure that any further io gets deferred.
  */
-int dm_suspend(struct mapped_device *md)
+int dm_suspend(struct mapped_device *md, int do_lockfs)
 {
 	struct dm_table *map = NULL;
 	DECLARE_WAITQUEUE(wait, current);
@@ -1064,9 +1064,11 @@ int dm_suspend(struct mapped_device *md)
 	}
 
 	/* Flush I/O to the device. */
-	r = lock_fs(md);
-	if (r)
-		goto out;
+	if (do_lockfs) {
+		r = lock_fs(md);
+		if (r)
+			goto out;
+	}
 
 	/*
 	 * First we set the BLOCK_IO flag so no more ios will be mapped.