[PATCH] md: send online/offline uevents when an md array starts/stops

This allows udev to do something intelligent when an array becomes
available.

Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/md/md.c

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 50ab4a9..d111356 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3200,6 +3200,7 @@
 
 	mddev->changed = 1;
 	md_new_event(mddev);
+	kobject_uevent(&mddev->gendisk->kobj, KOBJ_ONLINE);
 	return 0;
 }
 
@@ -3313,6 +3314,7 @@
 
 			module_put(mddev->pers->owner);
 			mddev->pers = NULL;
+			kobject_uevent(&mddev->gendisk->kobj, KOBJ_OFFLINE);
 			if (mddev->ro)
 				mddev->ro = 0;
 		}