I am sorry for that. thanks, Hannes.
yalong
On Fri, Jul 4, 2008 at 10:51 AM, Johannes Weiner <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> yalong <[EMAIL PROTECTED]> writes:
>
> > it's necessary for efficency of code.
>
> Oh, nice to hear.
>
> > when someCodition is FALSE, it's no cost on BUG(). but when you
> > changed to BUG_ON(), there is always a cost on BUG_ON() both TRUE and
> > FALSE.
>
> From bug.h:
>
> #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
>
> Having at least a small glance at the definition before replying FUD
> would have been too much?
>
> Two or three architectures define their own BUG_ON() but, random guess,
> only because they can check for the condition and raise an exception
> faster than the generic version.
>
> Hannes
>
