linux-kernel - Re: [PATCH] x86 - Enhance DEBUG_RODATA support

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Message-ID: <20080306162123.GA27163@one.firstfloor.org>
Date:	Thu, 6 Mar 2008 17:21:23 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	pageexec@...email.hu
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Ingo Molnar <mingo@...e.hu>,
	Srinivasa DS <srinivasa@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, ananth@...ibm.com,
	Jim Keniston <jkenisto@...ibm.com>, srikar@...ux.vnet.ibm.com,
	SystemTAP <systemtap@...rces.redhat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH] x86 - Enhance DEBUG_RODATA support - alternatives

> you probably want a BUG_ON instead (or some graceful recovery) else
> the NULL deref will trigger with IRQs off...

FWIW oopses don't have any trouble with interrupts being off.
So BUG_ON wouldn't add much value.

-Andi

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