linux-kernel - Re: [PATCH v8 4/8] cpufreq: amd-pstate: Remove amd_get_{min,max,nominal,lowest_nonlinear}

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Date: Mon, 18 Mar 2024 13:36:49 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Perry Yuan <perry.yuan@....com>
Cc: rafael.j.wysocki@...el.com, Mario.Limonciello@....com, 
	viresh.kumar@...aro.org, Ray.Huang@....com, gautham.shenoy@....com, 
	Borislav.Petkov@....com, Alexander.Deucher@....com, Xinmei.Huang@....com, 
	Xiaojian.Du@....com, Li.Meng@....com, linux-pm@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 4/8] cpufreq: amd-pstate: Remove amd_get_{min,max,nominal,lowest_nonlinear}_freq()

On Mon, Mar 18, 2024 at 10:49 AM Perry Yuan <perry.yuan@....com> wrote:
>
> From: "Gautham R. Shenoy" <gautham.shenoy@....com>
>
> amd_get_{min,max,nominal,lowest_nonlinear}_freq() functions merely
> return cpudata->{min,max,nominal,lowest_nonlinear}_freq values.
>
> There is no loss in readability in replacing their invocations by
> accesses to the corresponding members of cpudata.
>
> Do so and remove these helper functions.
>
> Signed-off-by: Gautham R. Shenoy <gautham.shenoy@....com>

Sender sign-off missing (when sending somebody else's patch, you need
to add your S-o-b tag to it).

> ---
>  drivers/cpufreq/amd-pstate.c | 40 +++++++++---------------------------
>  1 file changed, 10 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index ba1baa6733e6..132330b4942f 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -604,26 +604,6 @@ static void amd_pstate_adjust_perf(unsigned int cpu,
>         cpufreq_cpu_put(policy);
>  }
>
> -static int amd_get_min_freq(struct amd_cpudata *cpudata)
> -{
> -       return READ_ONCE(cpudata->min_freq);
> -}
> -
> -static int amd_get_max_freq(struct amd_cpudata *cpudata)
> -{
> -       return READ_ONCE(cpudata->max_freq);
> -}
> -
> -static int amd_get_nominal_freq(struct amd_cpudata *cpudata)
> -{
> -       return READ_ONCE(cpudata->nominal_freq);
> -}
> -
> -static int amd_get_lowest_nonlinear_freq(struct amd_cpudata *cpudata)
> -{
> -       return READ_ONCE(cpudata->lowest_nonlinear_freq);
> -}
> -
>  static int amd_pstate_set_boost(struct cpufreq_policy *policy, int state)
>  {
>         struct amd_cpudata *cpudata = policy->driver_data;
> @@ -854,10 +834,10 @@ static int amd_pstate_cpu_init(struct cpufreq_policy *policy)
>         if (ret)
>                 goto free_cpudata1;
>
> -       min_freq = amd_get_min_freq(cpudata);
> -       max_freq = amd_get_max_freq(cpudata);
> -       nominal_freq = amd_get_nominal_freq(cpudata);
> -       lowest_nonlinear_freq = amd_get_lowest_nonlinear_freq(cpudata);
> +       min_freq = READ_ONCE(cpudata->min_freq);
> +       max_freq = READ_ONCE(cpudata->max_freq);
> +       nominal_freq = READ_ONCE(cpudata->nominal_freq);
> +       lowest_nonlinear_freq = READ_ONCE(cpudata->lowest_nonlinear_freq);
>
>         if (min_freq < 0 || max_freq < 0 || min_freq > max_freq) {
>                 dev_err(dev, "min_freq(%d) or max_freq(%d) value is incorrect\n",
> @@ -960,7 +940,7 @@ static ssize_t show_amd_pstate_max_freq(struct cpufreq_policy *policy,
>         int max_freq;
>         struct amd_cpudata *cpudata = policy->driver_data;
>
> -       max_freq = amd_get_max_freq(cpudata);
> +       max_freq = READ_ONCE(cpudata->max_freq);
>         if (max_freq < 0)
>                 return max_freq;
>
> @@ -973,7 +953,7 @@ static ssize_t show_amd_pstate_lowest_nonlinear_freq(struct cpufreq_policy *poli
>         int freq;
>         struct amd_cpudata *cpudata = policy->driver_data;
>
> -       freq = amd_get_lowest_nonlinear_freq(cpudata);
> +       freq = READ_ONCE(cpudata->lowest_nonlinear_freq);
>         if (freq < 0)
>                 return freq;
>
> @@ -1315,10 +1295,10 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
>         if (ret)
>                 goto free_cpudata1;
>
> -       min_freq = amd_get_min_freq(cpudata);
> -       max_freq = amd_get_max_freq(cpudata);
> -       nominal_freq = amd_get_nominal_freq(cpudata);
> -       lowest_nonlinear_freq = amd_get_lowest_nonlinear_freq(cpudata);
> +       min_freq = READ_ONCE(cpudata->min_freq);
> +       max_freq = READ_ONCE(cpudata->max_freq);
> +       nominal_freq = READ_ONCE(cpudata->nominal_freq);
> +       lowest_nonlinear_freq = READ_ONCE(cpudata->lowest_nonlinear_freq);
>         if (min_freq < 0 || max_freq < 0 || min_freq > max_freq) {
>                 dev_err(dev, "min_freq(%d) or max_freq(%d) value is incorrect\n",
>                                 min_freq, max_freq);
> --
> 2.34.1
>
>