From: Jonathan Brassow <jbrassow@redhat.com>
Date: Thu, 11 Oct 2012 02:38:58 +0000 (+1100)
Subject: MD RAID10: Prep for DM RAID10 device replacement capability
X-Git-Tag: v3.7-rc1~10^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2863b9eb44787adecba4f977d71d7fd876805b1c;p=pandora-kernel.git

MD RAID10: Prep for DM RAID10 device replacement capability

MD RAID10:  Fix a couple potential kernel panics if RAID10 is used by dm-raid

When device-mapper uses the RAID10 personality through dm-raid.c, there is no
'gendisk' structure in mddev and some sysfs information is also not populated.

This patch avoids touching those non-existent structures.

Signed-off-by: Jonathan Brassow <jbrassow@rehdat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
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