From 4843c69d496a8d2e4caab6182fe016b9a79136e0 Mon Sep 17 00:00:00 2001
From: Vivek Goyal <vgoyal@redhat.com>
Date: Thu, 19 May 2011 15:38:27 -0400
Subject: [PATCH] blk-throttle: Free up a group only after one rcu grace period

Soon we will allow accessing a throtl_grp under rcu_read_lock(). Hence
start freeing up throtl_grp after one rcu grace period.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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