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

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Message-ID: <377c1b4f-9357-112c-009c-fd6a757665b9@quicinc.com>
Date: Wed, 28 Feb 2024 10:46:19 +0530
From: Sibi Sankar <quic_sibis@...cinc.com>
To: Trilok Soni <quic_tsoni@...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 2/28/24 01:02, Trilok Soni wrote:
> 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.

Hey Trilok,

Thanks for catching this. Will fix it in the re-spin.

-Sibi

> 
>>   
>>   /**
>>    * 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;