linux-kernel - Re: [PATCH] powerpc: Avoid pointless WARN_ON(irqs

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Message-ID: <alpine.LFD.0.999.0709180535470.8863@enigma.security.iitk.ac.in>
Date:	Tue, 18 Sep 2007 05:38:57 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Paul Mackerras <paulus@...ba.org>
cc:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	linuxppc-dev@...abs.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] powerpc: Avoid pointless WARN_ON(irqs_disabled()) from
 panic codepath



On Tue, 18 Sep 2007, Satyam Sharma wrote:
> 
> > ------------[ cut here ]------------
> > Badness at arch/powerpc/kernel/smp.c:202
> 
> comes when smp_call_function_map() has been called with irqs disabled,
> which is illegal. However, there is a special case, the panic() codepath,
> when we do not want to warn about this -- warning at that time is pointless
> anyway, and only serves to scroll away the *real* cause of the panic and
> distracts from the real bug.

BTW arch/ppc/ has same issue, but that's gonna be removed by next year
anyways, so I think there's no point making a patch for that (?)
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