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 ([email protected])
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me
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