On Fri, May 3, 2013 at 4:00 PM, Andy Lutomirski <l...@amacapital.net> wrote: > Signed-off-by: Andy Lutomirski <l...@amacapital.net> > --- > > This needs careful review. I don't really know what this code does, nor > do I have the hardware. (I don't understand AGP and the associated > caching implications.)
This patch is wrong (I didn't update the matching mtrr_del), and I'm reworking this whole series. But I may need some help on this one: why is the mtrr handle of a map (whatever a map is) exported to userspace via the ADD_MAP and GET_MAP ioctls? What (if anything) is userspace supposed to do with it? Do I need to return a valid MTRR register number? Is there any userspace code at all that sets _DRM_WRITE_COMBINING in DRM_IOCTL_ADD_MAP with appropriate alignment and needs the MTRR, for which the drm driver doesn't already add the MTRR? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
