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    SubjectRe: [PATCH] PPC/PPC64: Introduce CPU_HAS_FEATURE() macro
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    On Fri, Feb 04, 2005 at 01:36:55PM +0100, Arnd Bergmann wrote:
    > I have a somewhat similar patch that does the same to the
    > systemcfg->platform checks. I'm not sure if we should use the same inline
    > function for both checks, but I do think that they should be used in a
    > similar way, e.g. CPU_HAS_FEATURE(x) and PLATFORM_HAS_FEATURE(x).

    Yep. Firmware features are also on the list. I figured I'd do CPU features
    first though since they are the ones that started bugging me.

    > The same stuff is obviously possible for cur_cpu_spec->cpu_features as well.
    > Do you think that it will help there?

    Nice. It won't be quite as easy to do compile-time for cpu features.
    pSeries will need all cpus enabled since we have them all on various
    machines, etc. I guess Powermac/Maple could benefit from it. In the
    end it depends on how hairy the implementation would get vs performance
    improvement.


    -Olof
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