x86: add_branch_prefix_frag_p() vs PadLock insns

[H.J. Lu]

On Fri, Sep 26, 2025, 6:16 PM Jan Beulich <jbeulich@suse.com> wrote:

> H.J.,
>
> why is it that add_branch_prefix_frag_p() special-cases PadLock insns?
> They're by far not the only ones including prefixes in their opcodes.
> IOW - I wonder if the conditional there is either insufficient or
> excessive.
>

If I remember correctly, this is to mitigate
an Intel processor issue.  No Intel processor
support such instructions.


> Jan
>
>
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