Re: [PATCH v2 10/11] x86/alternatives: Simplify ALTERNATIVE_n()

[Peter Zijlstra]

On Sat, Sep 09, 2023 at 11:25:54AM +0200, Peter Zijlstra wrote:
> This becomes more of a problem with your example above where the
> respective lengths are 0, 5, 16. In that case, when you patch 5, you'll
> leave 11 single nops in there.
> 
> So what that code you deleted does is look for all alternatives that
> start at the same point and computes the max replacementlen, because
> that is the amount of bytes in the source text that has been reserved
> for this alternative.
> 
> That is not optional.

Note that the original alternatives did this with the alt_max_*() macro
at build time.