breaking old boxes just because, is just going to get reverted when I get the first regression report that you broke old boxes.
Not "just because", but *if* the choice is between breaking old boxes and breaking new boxes I'll take the latter.
But Linus won't so your choice doesn't matter.
Andy Lutomirski just submitted a bunch of patches to clean up the DRM usage of mtrrs, they are in drm-next, afaik we no longer add them on PAT systems.
Fantastic news. No issue, then, and no need to break anything.
Granted I haven't tested Andy's patches on my AGP boxes, and I intend to, if they do cause any regressions he'll be working them out :-)
Dave.