[PATCH] cpufreq: remove setting of policy->cpu in policy->cpus during init

[PATCH] cpufreq: remove setting of policy->cpu in policy->cpus during init

[Sudeep Holla]

policy->cpu is copied into policy->cpus in cpufreq_online() before
calling into cpufreq_driver->init(). So there's no need to set the
same in the individual driver init() functions again.

This patch removes the redundant setting of policy->cpu in policy->cpus
in intel_pstate and cppc drivers.

Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Reported-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/cpufreq/cppc_cpufreq.c | 1 -
 drivers/cpufreq/intel_pstate.c | 1 -
 2 files changed, 2 deletions(-)

Hi Viresh,

I had copied the cpumask_set_cpu from one of these drivers and when you
pointed out I thought it's better to remove the reference too. Let me
know if it makes sense.

Regards,
Sudeep

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 10be285c9055..a1c3025f9df7 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -172,7 +172,6 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		return -EFAULT;
 	}

-	cpumask_set_cpu(policy->cpu, policy->cpus);
 	cpu->cur_policy = policy;

 	/* Set policy->cur to max now. The governors will adjust later. */
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 0566455f233e..d82429859103 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2133,7 +2133,6 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
 	policy->cpuinfo.max_freq *= cpu->pstate.scaling;

 	intel_pstate_init_acpi_perf_limits(policy);
-	cpumask_set_cpu(policy->cpu, policy->cpus);

 	policy->fast_switch_possible = true;

--
2.7.4

Re: [PATCH] cpufreq: remove setting of policy->cpu in policy->cpus during init

[Viresh Kumar]

On 10-08-17, 15:58, Sudeep Holla wrote:
> policy->cpu is copied into policy->cpus in cpufreq_online() before
> calling into cpufreq_driver->init(). So there's no need to set the
> same in the individual driver init() functions again.
> 
> This patch removes the redundant setting of policy->cpu in policy->cpus
> in intel_pstate and cppc drivers.
> 
> Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Reported-by: Viresh Kumar <viresh.kumar@linaro.org>
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  drivers/cpufreq/cppc_cpufreq.c | 1 -
>  drivers/cpufreq/intel_pstate.c | 1 -
>  2 files changed, 2 deletions(-)
> 
> Hi Viresh,
> 
> I had copied the cpumask_set_cpu from one of these drivers and when you
> pointed out I thought it's better to remove the reference too. Let me
> know if it makes sense.
> 
> Regards,
> Sudeep
> 
> diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
> index 10be285c9055..a1c3025f9df7 100644
> --- a/drivers/cpufreq/cppc_cpufreq.c
> +++ b/drivers/cpufreq/cppc_cpufreq.c
> @@ -172,7 +172,6 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
>  		return -EFAULT;
>  	}
> 
> -	cpumask_set_cpu(policy->cpu, policy->cpus);
>  	cpu->cur_policy = policy;
> 
>  	/* Set policy->cur to max now. The governors will adjust later. */
> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> index 0566455f233e..d82429859103 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -2133,7 +2133,6 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
>  	policy->cpuinfo.max_freq *= cpu->pstate.scaling;
> 
>  	intel_pstate_init_acpi_perf_limits(policy);
> -	cpumask_set_cpu(policy->cpu, policy->cpus);
> 
>  	policy->fast_switch_possible = true;

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh

Re: [PATCH] cpufreq: remove setting of policy->cpu in policy->cpus during init

[Rafael J. Wysocki]

On Friday, August 11, 2017 7:09:02 AM CEST Viresh Kumar wrote:
> On 10-08-17, 15:58, Sudeep Holla wrote:
> > policy->cpu is copied into policy->cpus in cpufreq_online() before
> > calling into cpufreq_driver->init(). So there's no need to set the
> > same in the individual driver init() functions again.
> > 
> > This patch removes the redundant setting of policy->cpu in policy->cpus
> > in intel_pstate and cppc drivers.
> > 
> > Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
> > Cc: Viresh Kumar <viresh.kumar@linaro.org>
> > Reported-by: Viresh Kumar <viresh.kumar@linaro.org>
> > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> > ---
> >  drivers/cpufreq/cppc_cpufreq.c | 1 -
> >  drivers/cpufreq/intel_pstate.c | 1 -
> >  2 files changed, 2 deletions(-)
> > 
> > Hi Viresh,
> > 
> > I had copied the cpumask_set_cpu from one of these drivers and when you
> > pointed out I thought it's better to remove the reference too. Let me
> > know if it makes sense.
> > 
> > Regards,
> > Sudeep
> > 
> > diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
> > index 10be285c9055..a1c3025f9df7 100644
> > --- a/drivers/cpufreq/cppc_cpufreq.c
> > +++ b/drivers/cpufreq/cppc_cpufreq.c
> > @@ -172,7 +172,6 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
> >  		return -EFAULT;
> >  	}
> > 
> > -	cpumask_set_cpu(policy->cpu, policy->cpus);
> >  	cpu->cur_policy = policy;
> > 
> >  	/* Set policy->cur to max now. The governors will adjust later. */
> > diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> > index 0566455f233e..d82429859103 100644
> > --- a/drivers/cpufreq/intel_pstate.c
> > +++ b/drivers/cpufreq/intel_pstate.c
> > @@ -2133,7 +2133,6 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
> >  	policy->cpuinfo.max_freq *= cpu->pstate.scaling;
> > 
> >  	intel_pstate_init_acpi_perf_limits(policy);
> > -	cpumask_set_cpu(policy->cpu, policy->cpus);
> > 
> >  	policy->fast_switch_possible = true;
> 
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> 
> 

Applied, thanks!