From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Eduardo Valentin <edubezval@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:CPU FREQUENCY SCALING FRAMEWORK"
<linux-pm@vger.kernel.org>
Subject: Re: [PATCH 1/6] cpufreq: Use existing stub functions instead of IS_ENABLED macro
Date: Mon, 24 Jun 2019 11:37:17 +0200 [thread overview]
Message-ID: <225a3a6e-94d8-f801-6388-5ec90ca19e11@linaro.org> (raw)
In-Reply-To: <2097869.93pjHihJNk@kreacher>
On 24/06/2019 11:30, Rafael J. Wysocki wrote:
> On Monday, June 24, 2019 11:22:19 AM CEST Daniel Lezcano wrote:
>> On 22/06/2019 11:12, Rafael J. Wysocki wrote:
>>> On Fri, Jun 21, 2019 at 3:23 PM Daniel Lezcano
>>> <daniel.lezcano@linaro.org> wrote:
>>>>
>>>> The functions stub already exist for the condition the IS_ENABLED
>>>> is trying to avoid.
>>>>
>>>> Remove the IS_ENABLED macros as they are pointless.
>>>
>>> AFAICS, the IS_ENABLED checks are an optimization to avoid generating
>>> pointless code (including a branch) in case CONFIG_CPU_THERMAL is not
>>> set.
>>>
>>> Why do you think that it is not useful?
>>
>> I agree but I'm not a big fan of IS_ENABLED macros in the code when it
>> is possible to avoid them.
>>
>> What about adding a stub for that like:
>
> Well,
>
>> #ifdef CPU_THERMAL
>> static inline int cpufreq_is_cooling_dev(struct cpufreq_driver *drv)
>> {
>> return drv->flags & CPUFREQ_IS_COOLING_DEV;
>> }
>> #else
>> static inline int cpufreq_is_cooling_dev(struct cpufreq_driver *drv)
>> {
>> return 0;
>> }
>> #endif
>
> This may as well be defined as
>
> static inline int cpufreq_is_cooling_dev(struct cpufreq_driver *drv)
> {
> return IS_ENABLED(CPU_THERMAL) && drv->flags & CPUFREQ_IS_COOLING_DEV;
> }
>
> which is fewer lines of code.
Ah yes, even better.
> And I would call it something like cpufreq_thermal_control_enabled().
Ok, thanks!
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next prev parent reply other threads:[~2019-06-24 9:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-21 13:22 [PATCH 1/6] cpufreq: Use existing stub functions instead of IS_ENABLED macro Daniel Lezcano
2019-06-21 13:22 ` [PATCH 2/6] thermal/drivers/cpu_cooling: Unregister with the policy Daniel Lezcano
2019-06-24 6:03 ` Viresh Kumar
2019-06-24 7:30 ` Daniel Lezcano
2019-06-24 7:37 ` Viresh Kumar
2019-06-24 7:45 ` Daniel Lezcano
2019-06-24 9:39 ` Viresh Kumar
2019-06-21 13:22 ` [PATCH 3/6] cpufreq/drivers/arm_big_little: Remove cooling device usage Daniel Lezcano
2019-06-24 6:04 ` Viresh Kumar
2019-06-21 13:23 ` [PATCH 4/6] cpufreq: " Daniel Lezcano
2019-06-24 6:05 ` Viresh Kumar
2019-06-21 13:23 ` [PATCH 5/6] thermal/drivers/imx: " Daniel Lezcano
2019-06-24 6:06 ` Viresh Kumar
2019-06-21 13:23 ` [PATCH 6/6] thermal/drivers/ti: " Daniel Lezcano
2019-06-24 6:06 ` Viresh Kumar
2019-06-22 9:12 ` [PATCH 1/6] cpufreq: Use existing stub functions instead of IS_ENABLED macro Rafael J. Wysocki
2019-06-24 9:22 ` Daniel Lezcano
2019-06-24 9:30 ` Rafael J. Wysocki
2019-06-24 9:37 ` Daniel Lezcano [this message]
2019-06-24 8:53 ` Daniel Lezcano
2019-06-24 9:00 ` Rafael J. Wysocki
2019-06-24 9:07 ` Daniel Lezcano
2019-06-24 9:08 ` Viresh Kumar
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