On Mon, May 15, 2023 at 11:42:23AM +0200, Arnd Bergmann wrote: > The need for runtime feature checking in the callers on x86-64 is still > a bit awkward, but this is no worse than before. I understand that > turning this into a compile-time choice would require first settling > a larger debate about raising the default target for distros beyond > the current CONFIG_GENERIC_CPU. Looks like Power is going to be in the same boat, they can do cmpxchg128, but only for Power8+.
