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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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