From cec0707e40ae25794b5a2de7b7f03c51961f80d9 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 13 Jan 2009 15:28:32 +0100
Subject: [PATCH] block: silently error an unsupported barrier bio

This fixes a "regression" from 2.6.28, where the barrier probes that file
systems may do would trigger additional end request warnings in dmesg.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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