From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 21 Dec 2010 01:08:20 +0000 (+1100)
Subject: xfs: combine grant heads into a single 64 bit integer
X-Git-Tag: v2.6.38-rc1~44^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a69ed03c24d4a336c23b7116127713d5a8c5ac4d;p=pandora-kernel.git

xfs: combine grant heads into a single 64 bit integer

Prepare for switching the grant heads to atomic variables by
combining the two 32 bit values that make up the grant head into a
single 64 bit variable.  Provide wrapper functions to combine and
split the grant heads appropriately for calculations and use them as
necessary.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
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