From: Vivek Goyal <vgoyal@redhat.com>
Date: Tue, 25 Oct 2011 13:48:12 +0000 (+0200)
Subject: blk-throttle: Take blkcg->lock while traversing blkcg->policy_list
X-Git-Tag: v3.2-rc1~49^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a38eb630fa224d6fba8c14a4063174bc5e0f63bb;p=pandora-kernel.git

blk-throttle: Take blkcg->lock while traversing blkcg->policy_list

blkcg->policy_list is protected by blkcg->lock. Its not rcu protected
list. So even for readers, they need to take blkcg->lock. There are
few functions which were reading the list without taking lock. Fix it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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