From 0faa8cca883bbc6a0919e3c89128672659b75820 Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Thu, 14 Apr 2011 17:58:19 -0400
Subject: [PATCH] xen/blkback: remove per-queue plugging

commit 7eaceaccab5f40bbfda044629a6298616aeaed50 ("block: remove per-queue plugging")
added two new interfaces to plug and unplug: blk_start_plug
and blk_finish_plug. Lets use those.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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