From: Neil Brown <neilb@notabene.brown>
Date: Fri, 27 Jun 2008 22:31:26 +0000 (+1000)
Subject: Close race in md_probe
X-Git-Tag: v2.6.27-rc1~957^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f48ed538386cb41559282d989354e8f5d442d71c;p=pandora-kernel.git

Close race in md_probe

There is a possible race in md_probe.  If two threads call md_probe
for the same device, then one could exit (having checked that
->gendisk exists) before the other has called kobject_init_and_add,
thus returning an incomplete kobj which will cause problems when
we try to add children to it.

So extend the range of protection of disks_mutex slightly to
avoid this possibility.

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