From: Joe Thornber <ejt@redhat.com>
Date: Fri, 9 Aug 2013 13:19:32 +0000 (+0100)
Subject: dm space map disk: optimise sm_disk_dec_block
X-Git-Tag: v3.13-rc1~97^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40c57f475f416ab241124e1e6a593b2f982eaae3;p=pandora-kernel.git

dm space map disk: optimise sm_disk_dec_block

Don't waste time spotting blocks that have been allocated and then freed
in the same transaction.

The extra lookup is expensive, and I don't think it really gives us much.

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