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    SubjectRe: [PATCH] x86: Change x86 to use generic find_next_bit
    Alexander van Heukelum <> writes:
    > If the bitmap size is not a multiple of BITS_PER_LONG, and no set
    > (cleared) bit is found, find_next_bit (find_next_zero_bit) returns a
    > value outside of the range [0,size]. The generic version always returns
    > exactly size.

    With that change it is likely possible to remove the min(NR_CPUS in
    lib/cpumask.c __first/__next_cpu. iirc it was just a workaround for
    the x86 quirk. I suspect with such a change it would be possible to
    inline those again, possibly speeding up some loops who do cpumask
    walking (iirc the scheduler used to do that frequently)


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      Last update: 2008-03-09 21:31    [W:0.025 / U:37.396 seconds]
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