[PATCH] new radeon memory map fixes

[Benjamin Herrenschmidt]

Ok, so finally here is a new version of the patch. This time, it's
against modular and it comes with a DRM patch. The X driver and the DRM
patch should both work with the unpatched counterpart though you'll only
get the full benefit of the fixes with both patches applied.

As I had to shuffle a lot of code around in the X driver, there may
still be bugs lurking around. Especially look for regressions around
Xinerama and MergedFB as I haven't yet had a chance to test with those
(especially Xinerama is doing a lot of very dodgy stuffs in the radeon
driver).

Please, try to test all sort of combinations of color tiling on/off, dri
enabled/disabled, bit depth, hw/sw cursor etc...

Patches are available at:

Xorg driver patch:
http://gate.crashing.org/~benh/radeon-memmap-7.0-2.diff

DRM patch:
http://gate.crashing.org/~benh/radeon-memmap-drm-1.diff

Please, report any problem,
thanks,

Ben.