From: NeilBrown <neilb@suse.de>
Date: Mon, 21 Jul 2008 07:05:25 +0000 (+1000)
Subject: md: only count actual openers as access which prevent a 'stop'
X-Git-Tag: v2.6.27-rc1~957^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2ea68cf42aafdd93393b6b8b20fc3c2b5f4390c;p=pandora-kernel.git

md: only count actual openers as access which prevent a 'stop'

Open isn't the only thing that increments ->active.  e.g. reading
/proc/mdstat will increment it briefly.  So to avoid false positives
in testing for concurrent access, introduce a new counter that counts
just the number of times the md device it open.

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