linux-kernel - Re: [PATCH 1/2] cpufreq: Remove extra variables

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Date:	Tue, 30 Jul 2013 15:58:39 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] cpufreq: Remove extra variables

On Tuesday, July 30, 2013 07:06:33 PM Viresh Kumar wrote:
> We call cpufreq_cpu_get() in cpufreq_add_dev_symlink() to increase usage
> refcount of policy and not to get policy for a cpu. So, we don't really need to
> capture the return value of this routine and call put for it later for failure
> cases. We can simply use policy passed as an argument to this routine.
> 
> Moreover debug print is rewritten to make it more clear.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Both [1-2/2] look good, but what do they apply to?  Mainline, linux-next,
my bleeding-edge branch?

Rafael


> ---
>  drivers/cpufreq/cpufreq.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 170d344..35e1a03 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -813,19 +813,18 @@ static int cpufreq_add_dev_symlink(unsigned int cpu,
>  	int ret = 0;
>  
>  	for_each_cpu(j, policy->cpus) {
> -		struct cpufreq_policy *managed_policy;
>  		struct device *cpu_dev;
>  
>  		if (j == cpu)
>  			continue;
>  
> -		pr_debug("CPU %u already managed, adding link\n", j);
> -		managed_policy = cpufreq_cpu_get(cpu);
> +		pr_debug("Adding link for CPU: %u\n", j);
> +		cpufreq_cpu_get(cpu);
>  		cpu_dev = get_cpu_device(j);
>  		ret = sysfs_create_link(&cpu_dev->kobj, &policy->kobj,
>  					"cpufreq");
>  		if (ret) {
> -			cpufreq_cpu_put(managed_policy);
> +			cpufreq_cpu_put(policy);
>  			return ret;
>  		}
>  	}
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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