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    SubjectRe: [patch 0/9] mutex subsystem, -V4
    Nicolas Pitre <nico@cam.org> wrote:
    >
    > How can't you get the fact that semaphores could _never_ be as simple as
    > mutexes? This is a theoritical impossibility, which maybe turns out not
    > to be so true on x86, but which is damn true on ARM where the fast path
    > (the common case of a mutex) is significantly more efficient.
    >

    I did notice your comments. I'll grant that mutexes will save some tens of
    fastpath cycles on one minor architecture. Sorry, but that doesn't seem
    very important.
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