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SubjectRe: [PATCH 1/10] Cr4 is valid on some 486s
Gerd Knorr wrote:

>> Yep, extending alternatives is probably better than duplicating the
>> code. Maybe having some alternative_smp() macro which places both
>> code versions into the .altinstr_replacement table? If that sounds
>> ok I'll try to come up with a experimental patch.
>
>
> i.e. something like this (as basic idea, patch is far away from doing
> anything useful ...)?


You still need to preserve the originals so that you can patch in both
directions. In the dynamic scenario, you need a multi-way set of
alternatives, with the most conservative of those compiled in inline.

Zach
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