linux-kernel - Re: [PATCH v3 03/12] cpufreq: intel_pstate: Use scope-based cleanup helper

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Message-ID: <CAJZ5v0hu48NrMr6Vkjn_UyHywJMx7F5N6yWf2LiXxykZF79EKA@mail.gmail.com>
Date: Mon, 1 Sep 2025 17:17:05 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Zihuan Zhang <zhangzihuan@...inos.cn>
Cc: "Rafael J . wysocki" <rafael@...nel.org>, Viresh Kumar <viresh.kumar@...aro.org>, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Michael Ellerman <mpe@...erman.id.au>, 
	Krzysztof Kozlowski <krzk@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
	Thierry Reding <thierry.reding@...il.com>, MyungJoo Ham <myungjoo.ham@...sung.com>, 
	Kyungmin Park <kyungmin.park@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com>, 
	Jani Nikula <jani.nikula@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>, 
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Subject: Re: [PATCH v3 03/12] cpufreq: intel_pstate: Use scope-based cleanup helper

On Mon, Sep 1, 2025 at 10:58 AM Zihuan Zhang <zhangzihuan@...inos.cn> wrote:
>
> Replace the manual cpufreq_cpu_put() with __free(put_cpufreq_policy)
> annotation for policy references. This reduces the risk of reference
> counting mistakes and aligns the code with the latest kernel style.
>
> No functional change intended.
>
> Signed-off-by: Zihuan Zhang <zhangzihuan@...inos.cn>
> ---
>  drivers/cpufreq/intel_pstate.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
> index f366d35c5840..4abc1ef2d2b0 100644
> --- a/drivers/cpufreq/intel_pstate.c
> +++ b/drivers/cpufreq/intel_pstate.c
> @@ -1502,9 +1502,8 @@ static void __intel_pstate_update_max_freq(struct cpufreq_policy *policy,
>
>  static bool intel_pstate_update_max_freq(struct cpudata *cpudata)
>  {
> -       struct cpufreq_policy *policy __free(put_cpufreq_policy);
> +       struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpudata->cpu);
>
> -       policy = cpufreq_cpu_get(cpudata->cpu);
>         if (!policy)
>                 return false;

The structure of the code is intentional here and there's no reason to
change it.