From: Dan Williams <dan.j.williams@intel.com>
Date: Tue, 8 Sep 2009 19:01:04 +0000 (-0700)
Subject: ioat: cleanup completion status reads
X-Git-Tag: v2.6.32-rc1~60^2^2~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4fb9b9e8d55880523db550043dfb204696dd0422;p=pandora-kernel.git

ioat: cleanup completion status reads

The cleanup path makes an effort to only perform an atomic read of the
64-bit completion address.  However in the 32-bit case it does not
matter if we read the upper-32 and lower-32 non-atomically because the
upper-32 will always be zero.

Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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