From 7708992616487c00d5ca8ed7612111180d8e1b68 Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad@kernel.org>
Date: Fri, 15 Apr 2011 10:51:27 -0400
Subject: [PATCH] xen/blkback: Seperate the bio allocation and the bio
 submission.

We seperate the bio allocation (bio_alloc) from the bio submission so
that the error paths are much easier, and also so that the bio
submission can be done in one tight loop. It also makes the
plug/unplug calls much much easier.

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