From: NeilBrown <neilb@suse.de>
Date: Mon, 15 Dec 2014 01:57:00 +0000 (+1100)
Subject: md: minor cleanup in safe_delay_store.
X-Git-Tag: fixes-v4.0-rc1~120^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b30e66f5acc6bf22fff49d4093cf17454f914b7;p=pandora-kernel.git

md: minor cleanup in safe_delay_store.

There isn't really much room for races with ->safemode_delay.
But as I am trying to clean up any racy code and will soon
be removing reconfig_mutex protection from most _store()
functions:
 - only set mddev->safemode_delay once, to ensure no code
   can see an intermediate value
 - use safemode_timer to call md_safemode_timeout() rather than
   calling it directly, to ensure it never races with itself.

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