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    SubjectRe: __bad_udelay in 2.2.18pre15
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    > >> #define udelay(n) (__builtin_constant_p(n) ? \
    > >> ((n) > 20000 ? __bad_udelay() : __const_udelay((n) *
    > >> 0x10c6ul)) : \
    > >> __udelay(n))
    > >>
    > >> ...
    > >> It seems __bad_udelay is not defined anywhere in the kernel source.
    > >
    > >Correct. Its a compile time error trap
    >
    > Well, at first, I wanted to implement it the same way on PPC. However, it
    > dies on all occurences where udelay is called with a non-constant expression.

    __builtin_constant_p means non constant expressions will always call udelay

    > I spotted this case in a few PPC specific stuffs (fixable), but also in
    > the sys_nanosleep code, and in the de4x5 driver.

    I'll check these two

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