Re: [PATCH 1/5] x86/percpu: Differentiate this_cpu_{}() and __this_cpu_{}()

[Linus Torvalds]

On Wed, Feb 27, 2019 at 9:57 AM Nadav Amit <namit@xxxxxxxxxx> wrote:
>
> Iâll have a look at some specific function assembly, but overall, the â+mâ
> approach might prevent even more code optimizations than the âvolatileâ one.

Ok, that being the case, let's forget that patch.

I still wonder about the added volatiles to the xadd/cmpxchg cases,
which already had the "memory" clobber which should make the volatile
immaterial..

                 Linus