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SubjectRe: BUGed to death
On Tue, Apr 15 2003, Duncan Sands wrote:
> On Monday 14 April 2003 22:19, Martin J. Bligh wrote:
> > Seems all these bug checks are fairly expensive. I can get 1%
> > back on system time for kernel compiles by changing BUG to
> > "do {} while (0)" to make them all compile away. Profiles aren't
> > very revealing though ... seems to be within experimental error ;-(
>
> What happens if you just turn BUG_ON into "do {} while (0)"?

If you do that, you must audit every single BUG_ON to make sure the
expression doesn't have any side effects.

BUG_ON(do_the_good_stuff());

--
Jens Axboe, proud inventer of BUG_ON :-)

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