From: NeilBrown <[email-masked]>

Add .*suspend and .resume functions required by device-mapper target
implementations.

Cc: [email-masked]
Signed-off-by: NeilBrown <[email-masked]>
Signed-off-by: Jonathan Brassow <[email-masked]>
Signed-off-by: Mike Snitzer <[email-masked]>

---
drivers/md/dm-raid.c |   22 ++++++++++++++++++++++
 drivers/md/dm-raid.c |   22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

Index: linux-2.6.37/drivers/md/dm-raid.c
===================================================================
--- linux-2.6.37.orig/drivers/md/dm-raid.c
+++ linux-2.6.37/drivers/md/dm-raid.c
@@ -606,6 +606,25 @@ static void raid_io_hints(struct dm_targ
 			  (conf->raid_disks - conf->max_degraded));
 }
 
+static void raid_presuspend(struct dm_target *ti)
+{
+	struct raid_set *rs = ti->private;
+	md_stop_writes(&rs->md);
+}
+
+static void raid_postsuspend(struct dm_target *ti)
+{
+	struct raid_set *rs = ti->private;
+	mddev_suspend(&rs->md);
+}
+
+static void raid_resume(struct dm_target *ti)
+{
+	struct raid_set *rs = ti->private;
+
+	mddev_resume(&rs->md);
+}
+
 static struct target_type raid_target = {
 	.name = "raid",
 	.version = {1, 0, 0},
@@ -616,6 +635,9 @@ static struct target_type raid_target = 
 	.status = raid_status,
 	.iterate_devices = raid_iterate_devices,
 	.io_hints = raid_io_hints,
+	.presuspend = raid_presuspend,
+	.postsuspend = raid_postsuspend,
+	.resume = raid_resume,
 };
 
 static int __init dm_raid_init(void)