linux-kernel - Re: Definition of BUG on x86

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Message-ID: <499D89AF.5010406@goop.org>
Date:	Thu, 19 Feb 2009 08:32:47 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Petr Tesarik <ptesarik@...e.cz>, "H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Definition of BUG on x86

Ingo Molnar wrote:
> could we just do:
>
> 	__builtin_trap();
> 	for (;;);
>
> and _now_ GCC would optimize away the infinite loop? And if it 
> does something silly in a future release, we'd either get a 
> build error or we'd run into the infinite loop for sure.
>   

I guess that would work.  And we have plenty of infrastructure and 
precedent for compiler-dependent defines like this.

    J
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