From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Wed, 1 Apr 2009 01:22:31 +0000 (-0700)
Subject: drm: Use pgprot_writecombine in GEM GTT mapping to get the right bits for !PAT.
X-Git-Tag: v2.6.30-rc1~245^2~1^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1055f9ddad093f54dfd708a0f976582034d4ce1a;p=pandora-kernel.git

drm: Use pgprot_writecombine in GEM GTT mapping to get the right bits for !PAT.

Otherwise, the PAGE_CACHE_WC would end up getting us a UC-only mapping, and
the write performance of GTT maps dropped 10x.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[anholt: cleaned up unused var]
Signed-off-by: Eric Anholt <eric@anholt.net>
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