RE: [PATCH 6/6] x86/gsseg: use the LKGS instruction if available for load_gs_index()

[Li, Xin3]

> > > There are not that many call sites, so using something like this
> > > (incorporating Peter Z's suggestion for the exception handler) would
> > > be better from a code readability perspective vs. a tiny increase in code size.
> >
> > The existing approach patches the binary code thus we don't need to check it
> at runtime.
> 
> static_cpu_has() uses alternatives to patch the branch, so there is no runtime
> check after early boot.
> 

Sorry, didn't know it, thanks for point it out.

If we prefer static_cpu_has, are you asking to replace all alternative macros with it?

Xin