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    SubjectRe: page_launder() bug
    Tobias Ringstrom wrote:
    >
    > On Sun, 6 May 2001, David S. Miller wrote:
    > > It is the most straightforward way to make a '1' or '0'
    > > integer from the NULL state of a pointer.
    >
    > But is it really specified in the C "standards" to be exctly zero or one,
    > and not zero and non-zero?

    !0 is 1. !(anything else) is 0. It is zero and one, not
    zero and "non-zero". So a !! construction gives zero if you have
    zero, and one if you had anything else. There's no doubt about it.
    >
    > IMHO, the ?: construct is way more readable and reliable.

    Thats your opinion. There are many others. Some don't like the
    ?: at all, for example. And some like all valid C.

    Helge Hafting
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