BUG_ON and gcc don't mix

[Alan Modra]

On Tue, Aug 20, 2013 at 02:02:11PM +0930, Alan Modra wrote:
> On Tue, Aug 20, 2013 at 12:37:50PM +1000, Anton Blanchard wrote:
> > address of the trap instruction for our bug exception table. Maybe
> > we need a gcc builtin in which we can get a label on the trap
> > instruction. Would that be possible?
> 
> Not your actual _EMIT_BUG_ENTRY, but something like this ought to work.
> The only trick here is not putting anything after __builtin_trap()..

Doh!  I guess the whole point was to get the condition folded into the
trap, which is foiled by emitting an asm between the condition and
buildin_trap().

-- 
Alan Modra
Australia Development Lab, IBM