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.
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