From: Francisco Jerez <currojerez@riseup.net>
Date: Fri, 19 Feb 2010 21:30:15 +0000 (+1000)
Subject: drm/ttm: fix caching problem on non-PAT systems.
X-Git-Tag: v2.6.33~29^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0e2f38befa787f0267419082b33e8ac72269d77;p=pandora-kernel.git

drm/ttm: fix caching problem on non-PAT systems.

http://bugzilla.kernel.org/show_bug.cgi?id=15328

This fixes a serious regression on AGP/non-PAT systems, where
pages were ending up in the wrong state and slowing down the
whole system.

[airlied: taken this from the bug as the other option is to revert
the change which caused it].

Tested-by: John W. Linville (in bug).
Signed-off-by: Dave Airlie <airlied@redhat.com>
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