linux-kernel - Re: [PATCH 02/10] x86: Convert BUG() to use unreachable()

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Message-Id: <20090911013743.1CF13AEF@magilla.sf.frob.com>
Date:	Thu, 10 Sep 2009 18:37:43 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	David Daney <ddaney@...iumnetworks.com>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org
Subject: Re: [PATCH 02/10] x86: Convert BUG() to use unreachable()

> There are other cases where that kind of config-time testing could be 
> useful, and we could avoid doing various gcc checks dynamically from 
> within 'make' (along with checking for known-buggy versions etc).

I quite agree that this would be an improvement for many sorts of compiler
feature (and other tool detail) conditionalization.


Thanks,
Roland
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