linux-kernel - Re: [PATCH V3 1/2] cpufreq: Export cpufreq_update

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Message-ID: <2b68e15b-71ce-cf3b-a42d-e3e18aeb5ef2@quicinc.com>
Date: Tue, 27 Feb 2024 11:32:49 -0800
From: Trilok Soni <quic_tsoni@...cinc.com>
To: Sibi Sankar <quic_sibis@...cinc.com>, <sudeep.holla@....com>,
        <cristian.marussi@....com>, <rafael@...nel.org>,
        <viresh.kumar@...aro.org>, <morten.rasmussen@....com>,
        <dietmar.eggemann@....com>, <lukasz.luba@....com>,
        <pierre.gondois@....com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <quic_mdtipton@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH V3 1/2] cpufreq: Export cpufreq_update_pressure

On 2/27/2024 10:16 AM, Sibi Sankar wrote:
> The SCMI cpufreq driver doesn't require any additional signal
> smoothing provided by arch_update_hw_pressure interface, export
> cpufreq_update_pressure so that it can be called upon directly
> instead.
> 
> Suggested-by: Lukasz Luba <lukasz.luba@....com>
> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
> ---
>  drivers/cpufreq/cpufreq.c | 3 ++-
>  include/linux/cpufreq.h   | 2 ++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 76002aa3d12d..bdec2dfd77eb 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -2573,7 +2573,7 @@ DEFINE_PER_CPU(unsigned long, cpufreq_pressure);
>   *
>   * Update the value of cpufreq pressure for all @cpus in the policy.
>   */
> -static void cpufreq_update_pressure(struct cpufreq_policy *policy)
> +void cpufreq_update_pressure(struct cpufreq_policy *policy)
>  {
>  	unsigned long max_capacity, capped_freq, pressure;
>  	u32 max_freq;
> @@ -2598,6 +2598,7 @@ static void cpufreq_update_pressure(struct cpufreq_policy *policy)
>  	for_each_cpu(cpu, policy->related_cpus)
>  		WRITE_ONCE(per_cpu(cpufreq_pressure, cpu), pressure);
>  }
> +EXPORT_SYMBOL(cpufreq_update_pressure);

EXPORT_SYMBOL_GPL please. Other symbols in this file are _GPL as well. 

>  
>  /**
>   * cpufreq_set_policy - Modify cpufreq policy parameters.
> diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
> index 414bfc976b30..957bf8e4ca0d 100644
> --- a/include/linux/cpufreq.h
> +++ b/include/linux/cpufreq.h
> @@ -241,6 +241,7 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
>  void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
>  void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
>  bool has_target_index(void);
> +void cpufreq_update_pressure(struct cpufreq_policy *policy);
>  
>  DECLARE_PER_CPU(unsigned long, cpufreq_pressure);
>  static inline unsigned long cpufreq_get_pressure(int cpu)
> @@ -270,6 +271,7 @@ static inline bool cpufreq_supports_freq_invariance(void)
>  }
>  static inline void disable_cpufreq(void) { }
>  static inline void cpufreq_update_limits(unsigned int cpu) { }
> +static inline void cpufreq_update_pressure(struct cpufreq_policy *policy) { }
>  static inline unsigned long cpufreq_get_pressure(int cpu)
>  {
>  	return 0;
-- 
---Trilok Soni