linux-kernel - Re: [PATCH -tip] x86: cpu/intel_cacheinfo.c fix compilation warnings

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Date:	Tue, 14 Apr 2009 22:16:21 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mark Langsdorf <mark.langsdorf@....com>,
	Andreas Herrmann <andreas.herrmann3@....com>
Subject: Re: [PATCH -tip] x86: cpu/intel_cacheinfo.c fix compilation
 warnings

On Tue, 2009-04-14 at 15:32 +0200, Ingo Molnar wrote:
> * Jaswinder Singh Rajput <jaswinder@...nel.org> wrote:
> 
> > fix:
> >   arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘show_cache_disable’:
> >   arch/x86/kernel/cpu/intel_cacheinfo.c:712: warning: unused variable ‘node’
> >   arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
> >   arch/x86/kernel/cpu/intel_cacheinfo.c:739: warning: unused variable ‘node’
> 
> you again 'fixed' a warning.
> 
> this made you fail to analyze and miss the real reason for this for 
> example:
> 
> >   arch/x86/kernel/cpu/intel_cacheinfo.c:739: warning: unused variable ‘node’
> 
> > -	int node = cpu_to_node(cpu);
> 
> the local variable is clearly initialized.
> 
> The problem is not with that variable - the problem is most likely 
> with the cpu_to_node() macro not creating a reference to the 'cpu' 
> variable in a compiler-visible way, in the !NUMA case.
> 
> The typical way to solve this is to add a dummy:
> 
> 	(void)(cpu)
> 
> use to the 'cpu' parameter to the macro definition - or, (which is a 
> much better solution), to convert it to an inline function.
> 

OK send patch:
[PATCH -tip] x86: k8.h reference to node in node_to_k8_nb_misc for !CONFIG_K8_NB

Thanks,

--
JSR

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