On Wed, Jul 25, 2007 at 09:56:12AM -0700, Linus Torvalds wrote: > > > On Tue, 24 Jul 2007, David Miller wrote: > > > > From: Jeremy Fitzhardinge <[EMAIL PROTECTED]> > > Date: Tue, 24 Jul 2007 23:24:55 -0700 > > > > > H. Peter Anvin wrote: > > > > How far back was __builtin_trap() supported? > > > > > > I think its relatively recent, but it might be within our supported > > > compiler window. > > > > I'm pretty sure it is. > > .. and I'm pretty sure it's immaterial. > > We don't just do the "ud2" instruction - we also do the file and line > number information after it. Which means that __builtin_trap() is useless. > > So we might as well keep the loop, since both are two-byte instructions > that tell gcc that it will never continue.
Umm... Actually, we might be able to do something like { l: __builtin_trap(); static struct ... v __attribute__((section(...))) = { &&l, n, file }; } except that it would need block-local labels and those are ugly (so's &&<label>, while we are at it)... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/