From dd4a4ffc0a4723cd0bef065af549803d256e1f7e Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 14 May 2013 13:52:30 -0700
Subject: [PATCH] blkcg: move blkg_for_each_descendant_pre() to
 block/blk-cgroup.h

blk-throttle hierarchy support will make use of it.  Move
blkg_for_each_descendant_pre() from block/blk-cgroup.c to
block/blk-cgroup.h.

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