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    SubjectRe: div64.h:do_div() bug - SPARC, SH anbody?
    Got confirmation that ARM and CRIS experience the problem, pending info
    from folks with access to SPARC or SH architectures... anybody?

    -r2r-

    On Mon, 29 Sep 2003, Artur Klauser wrote:
    > I've found that a bug in asm-arm/div64.h:do_div() is preventing correct
    > conversion of timestamps in smbfs (and probably ntfs as well) from NT to
    > Unix format. I'll post a patch that fixes the bug, but I think it is also
    > present in other architectures - at least SPARC, SH, and CRIS look
    > suspicious.
    >
    > If people with access to these architectures could run the following small
    > test and let me know the outcome, I can fix it there too - thanks.
    >
    > //-----------------------------------------------------------------------------
    > #define __KERNEL__
    > #include <asm/types.h> // get kernel definition of u64, u32
    > #undef __KERNEL__
    > #include <asm/div64.h> // get definition of do_div()
    > #include <stdio.h>
    >
    > main () {
    > union {
    > u64 n64;
    > u32 n32[2];
    > } in, out;
    >
    > in.n32[0] = 1;
    > in.n32[1] = 1;
    > out = in;
    >
    > do_div(out.n64, 1);
    >
    > if (in.n64 != out.n64) {
    > printf("FAILURE: asm/div64.h:do_div() is broken for 64-bit dividends\n");
    > exit(1);
    > } else {
    > printf("Congratulations: asm/div64.h:do_div() handles 64-bit dividends\n");
    > }
    > return 0;
    > }
    > //-----------------------------------------------------------------------------
    -
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