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    SubjectRe: [RFC][PATCH] Faster generic_fls
    On Mer, 2003-04-30 at 17:16, Linus Torvalds wrote:
    > Clearly you're not going to make _one_ load to get fls, since having a
    > 4GB lookup array for a 32-bit fls would be "somewhat" wasteful.

    It ought to be basically the same as ffs because if I remember rightly

    ffs(x^(x-1)) == fls(x)

    Been a long time so I may have it wrong

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