Messages in this thread | | | Date | Sat, 10 Jul 2004 02:52:08 +0200 | From | Andrea Arcangeli <> | Subject | Re: [announce] [patch] Voluntary Kernel Preemption Patch |
| |
On Sat, Jul 10, 2004 at 01:50:17AM +0200, Andrea Arcangeli wrote: > agreed. might_sleep() just like BUG() can be defined to noop.
BTW, this reminded me a related topic that I can't recall being ever mentioned on l-k: BUG_ON can also be optimized away. So people should be careful not to do write this:
BUG_ON(test_and_set_bit(p))
but to write this instead:
if (unlikely(test_and_set_bit(p)) BUG()
(in short the check inside a BUG_ON must be strictly read-only since it's not guaranteed to be computed) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |