From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 01:57:01 +0000 (+1100)
Subject: md: make reconfig_mutex optional for writes to md sysfs files.
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~104^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6791875e2e53;p=pandora-kernel.git

md: make reconfig_mutex optional for writes to md sysfs files.

Rather than using mddev_lock() to take the reconfig_mutex
when writing to any md sysfs file, we only take mddev_lock()
in the particular _store() functions that require it.
Admittedly this is most, but it isn't all.

This also allows us to remove special-case handling for new_dev_store
(in md_attr_store).

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