From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 01:57:01 +0000 (+1100)
Subject: md: use mddev->lock to protect updates to resync_{min,max}.
X-Git-Tag: fixes-v4.0-rc1~120^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23da422b1951cb8dbcb7c3090057cb6d5ceedf49;p=pandora-kernel.git

md: use mddev->lock to protect updates to resync_{min,max}.

There are interdependencies between these two sysfs attributes
and whether a resync is currently running.

Rather than depending on reconfig_mutex to ensure no races when
testing these interdependencies are met, use the spinlock.
This will allow the mutex to be remove from protecting this
code in a subsequent patch.

Signed-off-by: NeilBrown <neilb@suse.de>
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