From: Josh Durgin <josh.durgin@inktank.com>
Date: Sat, 5 Apr 2014 00:49:12 +0000 (-0700)
Subject: rbd: make discard trigger copy-on-write
X-Git-Tag: omap-for-v3.19/prcm-cleanup~68^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c220881e307b62cc2f77d911219de332aa3f61e;p=pandora-kernel.git

rbd: make discard trigger copy-on-write

Discard requests are a form of write, so they should go through the
same process as plain write requests and trigger copy-on-write for
layered images.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
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