linux-kernel - Re: [PATCH 0/7] x86/UV/KDB/NMI: Updates for NMI/KDB handler for SGI UV

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Date:	Tue, 24 Sep 2013 16:59:11 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Mike Travis <travis@....com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Jason Wessel <jason.wessel@...driver.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dimitri Sivanich <sivanich@....com>,
	Hedi Berriche <hedi@....com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/7] x86/UV/KDB/NMI: Updates for NMI/KDB handler for SGI
 UV


* Mike Travis <travis@....com> wrote:

> On 9/24/2013 12:52 AM, Ingo Molnar wrote:
> > 
> > Hm, do you test-build your patches? 
> 
> Both build and test incessantly...
> 
> This series produces the following
> > annoying warning:
> > 
> >  arch/x86/platform/uv/uv_nmi.c: In function ‘uv_nmi_setup’:
> >  arch/x86/platform/uv/uv_nmi.c:664:2: warning: the address of ‘uv_nmi_cpu_mask’ will always evaluate as ‘true’ [-Waddress]
> 
> I didn't hit the above warning since I never tried building without 
> CONFIG_CPUMASK_OFFSTACK defined. [...]

Ok, that explains it!

> [...]  I wonder if uv_nmi.c should not be built if not on an enterprise 
> sized system?

I don't think so - the config variations help root out such bugs.

Thanks,

	Ingo
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