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    SubjectRe: [PATCH] trivial, document that div64_u64() is not precise on 32bit platforms
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    Andrew,

    On Tue, 2010-08-03 at 15:28 -0700, Andrew Morton wrote:
    > Well that was a bit lazy of us - I wonder how hard it is to fix.
    >
    > At present people will test their code on 64-bit only to find out
    > later
    > that it doesn't work correctly on 32-bit. Bad. Perhaps we should
    > similarly break the 64-bit version :)

    I just talked to Brian. He's got an implementation that does the
    division correctly. He's going to clean it up and send you a patch so
    that it will work without losing precision on both 32b and 64b. It is
    based upon public domain code from http://www.hackersdelight.org and
    has been proven to be correct in all cases.

    -ben




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