From 06ecc6cbf7a60cd5abd9fd2bda8ae69b395c2be3 Mon Sep 17 00:00:00 2001
From: Alex Elder <elder@dreamhost.com>
Date: Thu, 1 Nov 2012 10:17:15 -0500
Subject: [PATCH] rbd: define and use rbd_warn()

Define a new function rbd_warn() that produces a boilerplate warning
message, identifying in the resulting message the affected rbd
device in the best way available.  Use it in a few places that now
use pr_warning().

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Dan Mick <dan.mick@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
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