linux-kernel - Re: [tip:x86/cpu] x86: cacheinfo: replace sysfs interface for cache

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Date:	Mon, 13 Apr 2009 10:22:04 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	andreas.herrmann3@....com, akpm@...ux-foundation.org,
	mark.langsdorf@....com, tglx@...utronix.de, mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/cpu] x86: cacheinfo: replace sysfs interface for
 cache_disable feature

Hello Mark,

On Fri, 2009-04-10 at 12:37 +0000, Mark Langsdorf wrote:
> Commit-ID:  f8b201fc7110c3673437254e8ba02451461ece0b
> Gitweb:     http://git.kernel.org/tip/f8b201fc7110c3673437254e8ba02451461ece0b
> Author:     Mark Langsdorf <mark.langsdorf@....com>
> AuthorDate: Thu, 9 Apr 2009 15:18:49 +0200
> Committer:  Ingo Molnar <mingo@...e.hu>
> CommitDate: Fri, 10 Apr 2009 14:21:53 +0200
> 
> x86: cacheinfo: replace sysfs interface for cache_disable feature
> 
> Impact: replace sysfs attribute
> 
> Current interface violates against "one-value-per-sysfs-attribute
> rule". This patch replaces current attribute with two attributes --
> one for each L3 Cache Index Disable register.
> 
> Signed-off-by: Mark Langsdorf <mark.langsdorf@....com>
> Signed-off-by: Andreas Herrmann <andreas.herrmann3@....com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> LKML-Reference: <20090409131849.GJ31527@...erich.amd.com>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> 
> 
> ---
>  arch/x86/kernel/cpu/intel_cacheinfo.c |   90 ++++++++++++++++----------------
>  1 files changed, 45 insertions(+), 45 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
> index 0cde071..fc28291 100644
> --- a/arch/x86/kernel/cpu/intel_cacheinfo.c
> +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
> @@ -697,73 +697,69 @@ static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf)
>  #define to_object(k)	container_of(k, struct _index_kobject, kobj)
>  #define to_attr(a)	container_of(a, struct _cache_attr, attr)
>  
> -static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf)
> +static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
> +				  unsigned int index)
>  {
> -	const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
> -	int node = cpu_to_node(cpumask_first(mask));
> -	struct pci_dev *dev = NULL;
> -	ssize_t ret = 0;
> -	int i;
> +	int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
> +	int node = cpu_to_node(cpu);
> +	struct pci_dev *dev = node_to_k8_nb_misc(node);
> +	unsigned int reg = 0;

This leads to compilation warnings:
  CC      arch/x86/kernel/cpu/intel_cacheinfo.o
arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘show_cache_disable’:
arch/x86/kernel/cpu/intel_cacheinfo.c:712: warning: unused variable ‘node’

>  
> -static ssize_t
> -store_cache_disable(struct _cpuid4_info *this_leaf, const char *buf,
> -		    size_t count)
> +static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
> +	const char *buf, size_t count, unsigned int index)
>  {
> -	const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
> -	int node = cpu_to_node(cpumask_first(mask));
> -	struct pci_dev *dev = NULL;
> -	unsigned int ret, index, val;
> +	int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
> +	int node = cpu_to_node(cpu);
> +	struct pci_dev *dev = node_to_k8_nb_misc(node);
> +	unsigned long val = 0;
>  

  CC      arch/x86/kernel/cpu/intel_cacheinfo.o
arch/x86/kernel/cpu/intel_cacheinfo.c: In function ‘store_cache_disable’:
arch/x86/kernel/cpu/intel_cacheinfo.c:737: warning: unused variable ‘cpu’

Thanks,
--
JSR


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