Re: [PATCH 05/17] thermal: cpu_cooling: remove cpufreq_cooling_get_level()
From: Eduardo Valentin
Date: Tue Apr 11 2017 - 13:43:55 EST
On Thu, Mar 16, 2017 at 10:59:40AM +0530, Viresh Kumar wrote:
> There is only one user of cpufreq_cooling_get_level() and that already
> has pointer to the cpufreq_dev structure. It can directly call
> get_level() instead and we can get rid of cpufreq_cooling_get_level().
>
> Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
> drivers/thermal/cpu_cooling.c | 33 +--------------------------------
> include/linux/cpu_cooling.h | 6 ------
> 2 files changed, 1 insertion(+), 38 deletions(-)
>
> diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
> index e2931c20c309..99dc6833de75 100644
> --- a/drivers/thermal/cpu_cooling.c
> +++ b/drivers/thermal/cpu_cooling.c
> @@ -137,37 +137,6 @@ static unsigned long get_level(struct cpufreq_cooling_device *cpufreq_dev,
> }
>
> /**
> - * cpufreq_cooling_get_level - for a given cpu, return the cooling level.
> - * @cpu: cpu for which the level is required
> - * @freq: the frequency of interest
> - *
> - * This function will match the cooling level corresponding to the
> - * requested @freq and return it.
> - *
> - * Return: The matched cooling level on success or THERMAL_CSTATE_INVALID
> - * otherwise.
> - */
> -unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
> -{
> - struct cpufreq_cooling_device *cpufreq_dev;
> -
> - mutex_lock(&cooling_list_lock);
> - list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) {
> - if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) {
> - unsigned long level = get_level(cpufreq_dev, freq);
> -
> - mutex_unlock(&cooling_list_lock);
> - return level;
> - }
> - }
> - mutex_unlock(&cooling_list_lock);
> -
> - pr_err("%s: cpu:%d not part of any cooling device\n", __func__, cpu);
> - return THERMAL_CSTATE_INVALID;
> -}
> -EXPORT_SYMBOL_GPL(cpufreq_cooling_get_level);
> -
> -/**
> * cpufreq_thermal_notifier - notifier callback for cpufreq policy change.
> * @nb: struct notifier_block * with callback info.
> * @event: value showing cpufreq event for which this function invoked.
> @@ -698,7 +667,7 @@ static int cpufreq_power2state(struct thermal_cooling_device *cdev,
> normalised_power = (dyn_power * 100) / last_load;
> target_freq = cpu_power_to_freq(cpufreq_dev, normalised_power);
>
> - *state = cpufreq_cooling_get_level(cpu, target_freq);
> + *state = get_level(cpufreq_dev, target_freq);
Did I miss something or we are loosing semantics here?
I guess the idea at this point is to get the level corresponding to the
frequency on a specific cpu. Let's have a look on get_level()..
I guess now we can rely on the freq table held in the
cpufreq_cooling_device..
> if (*state == THERMAL_CSTATE_INVALID) {
> dev_err_ratelimited(&cdev->device,
> "Failed to convert %dKHz for cpu %d into a cdev state\n",
> diff --git a/include/linux/cpu_cooling.h b/include/linux/cpu_cooling.h
> index c156f5082758..96c5e4c2f9c8 100644
> --- a/include/linux/cpu_cooling.h
> +++ b/include/linux/cpu_cooling.h
> @@ -82,7 +82,6 @@ of_cpufreq_power_cooling_register(struct device_node *np,
> */
> void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
>
> -unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
> #else /* !CONFIG_CPU_THERMAL */
> static inline struct thermal_cooling_device *
> cpufreq_cooling_register(const struct cpumask *clip_cpus)
> @@ -117,11 +116,6 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
> {
> return;
> }
> -static inline
> -unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
> -{
> - return THERMAL_CSTATE_INVALID;
> -}
> #endif /* CONFIG_CPU_THERMAL */
>
> #endif /* __CPU_COOLING_H__ */
> --
> 2.7.1.410.g6faf27b
>
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