Messages in this thread | | | From | Uros Bizjak <> | Date | Tue, 10 Oct 2023 20:41:29 +0200 | Subject | Re: [PATCH v2 -tip] x86/percpu: Use C for arch_raw_cpu_ptr() |
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On Tue, Oct 10, 2023 at 8:38 PM Linus Torvalds <torvalds@linux-foundation.org> wrote: > > On Tue, 10 Oct 2023 at 11:22, Uros Bizjak <ubizjak@gmail.com> wrote: > > > > Please note that besides propagation of the addition into address, the > > patch also exposes memory load to the compiler, with the anticipation > > that the compiler CSEs the load from this_cpu_off from eventual > > multiple addresses. For this to work, we have to get rid of the asms. > > I actually checked that the inline asm gets combined, the same way the > this_cpu_read_stable cases do (which we use for 'current').
Yes, but does it CSE the load from multiple addresses?
Uros.
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