linux-kernel - Re: [PATCH v5 02/23] PM: EM: Refactor em_cpufreq_update

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Message-ID: <89df2982-5492-43db-8e25-d974ff19fda2@arm.com>
Date: Tue, 19 Dec 2023 10:30:32 +0000
From: Lukasz Luba <lukasz.luba@....com>
To: Qais Yousef <qyousef@...alina.io>
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
 rafael@...nel.org, dietmar.eggemann@....com, rui.zhang@...el.com,
 amit.kucheria@...durent.com, amit.kachhap@...il.com,
 daniel.lezcano@...aro.org, viresh.kumar@...aro.org, len.brown@...el.com,
 pavel@....cz, mhiramat@...nel.org, wvw@...gle.com
Subject: Re: [PATCH v5 02/23] PM: EM: Refactor
 em_cpufreq_update_efficiencies() arguments



On 12/17/23 17:58, Qais Yousef wrote:
> On 11/29/23 11:08, Lukasz Luba wrote:
>> In order to prepare the code for the modifiable EM perf_state table,
>> refactor existing function em_cpufreq_update_efficiencies().
> 
> nit: What is being refactored here? The description is not adding much info
> about the change.

The function takes the ptr to the table now as its argument. You have
missed that in the code below?

> 
> 
> Cheers
> 
> --
> Qais Yousef
> 
>>
>> Signed-off-by: Lukasz Luba <lukasz.luba@....com>
>> ---
>>   kernel/power/energy_model.c | 8 +++-----
>>   1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
>> index 8b9dd4a39f63..42486674b834 100644
>> --- a/kernel/power/energy_model.c
>> +++ b/kernel/power/energy_model.c
>> @@ -237,10 +237,10 @@ static int em_create_pd(struct device *dev, int nr_states,
>>   	return 0;
>>   }
>>   
>> -static void em_cpufreq_update_efficiencies(struct device *dev)
>> +static void
>> +em_cpufreq_update_efficiencies(struct device *dev, struct em_perf_state *table)
>>   {
>>   	struct em_perf_domain *pd = dev->em_pd;
>> -	struct em_perf_state *table;
>>   	struct cpufreq_policy *policy;
>>   	int found = 0;
>>   	int i;
>> @@ -254,8 +254,6 @@ static void em_cpufreq_update_efficiencies(struct device *dev)
>>   		return;
>>   	}
>>   
>> -	table = pd->table;
>> -
>>   	for (i = 0; i < pd->nr_perf_states; i++) {
>>   		if (!(table[i].flags & EM_PERF_STATE_INEFFICIENT))
>>   			continue;
>> @@ -397,7 +395,7 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
>>   
>>   	dev->em_pd->flags |= flags;
>>   
>> -	em_cpufreq_update_efficiencies(dev);
>> +	em_cpufreq_update_efficiencies(dev, dev->em_pd->table);
>>   
>>   	em_debug_create_pd(dev);
>>   	dev_info(dev, "EM: created perf domain\n");
>> -- 
>> 2.25.1
>>
>