[coreboot-gerrit] Change in ...coreboot[master]: Revert "cpu/x86/mtrr: Fix sign overflow"

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/31290 )

Change subject: Revert "cpu/x86/mtrr: Fix sign overflow"
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Patch Set 1:
> Please introduce a better fix on x86_64.

Fix for what? you've never mentioned what you are trying to fix.
And it's not every obvious how a 21-bit number that doesn't
overflow on x86_32 overflows on x86_64.

If your change is really fixing something, it very likely hides
a problem somewhere else.

Also, please read the comment above the macros, it's supposed
to work not only in C.