From: Keith Packard <keithp@keithp.com>
Date: Fri, 31 Oct 2008 02:38:48 +0000 (-0700)
Subject: i915: use io-mapping interfaces instead of a variety of mapping kludges
X-Git-Tag: v2.6.28-rc4~91^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0839ccb8ac6a9e2d5e175a4ae9c82b5c574d510d;p=pandora-kernel.git

i915: use io-mapping interfaces instead of a variety of mapping kludges

Impact: optimize/clean-up the IO mapping implementation of the i915 DRM driver

Switch the i915 device aperture mapping to the io-mapping interface, taking
advantage of the cleaner API to extend it across all of the mapping uses,
including both pwrite and relocation updates.

This dramatically improves performance on 64-bit kernels which were using
the same slow path as 32-bit non-HIGHMEM kernels prior to this patch.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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