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SubjectRe: A pettiness question.
liyu wrote:
> Hi, All.
> I found there are use double operator ! continuously sometimes in
> kernel.
> e.g:
>
> static inline int is_page_cache_freeable(struct page *page)
> {
> return page_count(page) - !!PagePrivate(page) == 2;
> }
>
> Who would like tell me why write like above?
>
!!(N) is easier to write than ((N) ? 1 : 0)
--
-bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me

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