linux-kernel - Re: [PATCH][RFC] getting rid of stupid loop in BUG()

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Date:	Tue, 24 Jul 2007 23:24:55 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Keith Owens <kaos@....com.au>, Trent Piepho <xyzzy@...akeasy.org>,
	Al Viro <viro@....linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH][RFC] getting rid of stupid loop in BUG()

H. Peter Anvin wrote:
> INT 6 is #UD, so the __builtin_trap() replaces the ud2a as well as the loop.
>   

__builtin_trap() emits an actual ud2a; the effect is an int 6, of course.

> How far back was __builtin_trap() supported?

I think its relatively recent, but it might be within our supported
compiler window.

    J
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