From: Joe Thornber <ejt@redhat.com>
Date: Fri, 13 Jun 2014 12:57:09 +0000 (+0100)
Subject: dm thin: switch to an atomic_t for tracking pending new block preparations
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~72^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50f3c3efdd5773d90396be07a7ecaa58227ff906;p=pandora-kernel.git

dm thin: switch to an atomic_t for tracking pending new block preparations

Previously we used separate boolean values to track quiescing and
copying actions.  By switching to an atomic_t we can support blocks that
need a partial copy and partial zero.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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