From 5cac7861b2de95a1f714ebdc652813abd0afcc73 Mon Sep 17 00:00:00 2001
From: Maciej Trela <Maciej.Trela@intel.com>
Date: Wed, 14 Apr 2010 17:17:39 +1000
Subject: md: notify level changes through sysfs.

Level changes can be very significant, so make sure
to notify them via sysfs.

Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 46bdf4b..c5a1b07 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3059,6 +3059,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
 	set_bit(MD_CHANGE_DEVS, &mddev->flags);
 	set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
 	md_wakeup_thread(mddev->thread);
+	sysfs_notify(&mddev->kobj, NULL, "level");
 	return rv;
 }
 
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