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    SubjectRe: [PATCH] scripts/checksyscalls.sh: only whine perf_counter_open when supported
    On Fri, Jun 12, 2009 at 11:21, Ingo Molnar wrote:
    > * Mike Frysinger <vapier.adi@gmail.com> wrote:
    >> the perf counter code explicitly requires:
    >> ...
    >>  - support for atomic64 types (unless i missed something, x86 is the
    >> only 32bit system that supports these)
    >
    > A wrapper suffices - should probably be librarized into lib/.

    wonder if we can trick Arnd into doing that ...

    >>  - some perf stubs (like set_perf_counter_pending() -- prototype
    >> really should be in common perf_counters headers rather than forcing
    >> the arch to copy & paste the exact same line)
    >
    > Agreed.

    can i assume you'll take care of that ?

    >> not that any of this is documented ...
    >
    > Patches are welcome :-)

    i cant find anything in Documentation/ covering perf counters. did i
    miss some file ?

    also, i was going just by a quick compile test. dont know what else
    is actually required since there's no chance of me trying to get this
    to work on Blackfin anytime soon ...

    > You are right that the requirements are not necessarily trivial for
    > every arch - so i guess our original patch is correct.

    there is also some ptrace type piece missing for the Blackfin arch,
    but that looks like something that i should just implement as everyone
    else is doing it.
    -mike
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