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    SubjectRe: page_launder() bug

    On Sun, 6 May 2001, Jonathan Morton wrote:

    > >- page_count(page) == (1 + !!page->buffers));
    > Two inversions in a row? I'd like to see that made more explicit,
    > otherwise it looks like a bug to me. Of course, if it IS a bug...
    it's not a bug.
    if page->buffers is zero, than the page_count(page) is 1, and if
    page->buffers is other than zero, page_count(page) is 2.
    so it checks if page is really used by something.
    maybe this last line is not true, but the !!page->buffers is not a bug.


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