linux-kernel - Re: [PATCH v2 10/18] cpufreq: s5pv210: Use __free(put_cpufreq

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Message-ID: <20250829061313.bloyct5htjym6b3j@vireshk-i7>
Date: Fri, 29 Aug 2025 11:43:13 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Zihuan Zhang <zhangzihuan@...inos.cn>
Cc: "Rafael J . wysocki" <rafael@...nel.org>,
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Subject: Re: [PATCH v2 10/18] cpufreq: s5pv210: Use
 __free(put_cpufreq_policy) for policy reference

On 27-08-25, 10:31, Zihuan Zhang 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/s5pv210-cpufreq.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
> index 76c888ed8d16..95f1568e9530 100644
> --- a/drivers/cpufreq/s5pv210-cpufreq.c
> +++ b/drivers/cpufreq/s5pv210-cpufreq.c
> @@ -555,7 +555,7 @@ static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
>  						 unsigned long event, void *ptr)
>  {
>  	int ret;
> -	struct cpufreq_policy *policy;
> +	struct cpufreq_policy *policy __free(put_cpufreq_policy);
>  
>  	policy = cpufreq_cpu_get(0);
>  	if (!policy) {
> @@ -564,7 +564,6 @@ static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
>  	}
>  
>  	ret = cpufreq_driver_target(policy, SLEEP_FREQ, 0);
> -	cpufreq_cpu_put(policy);
>  
>  	if (ret < 0)
>  		return NOTIFY_BAD;

Merged with minor change:

diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c
index 95f1568e9530..4215621deb3f 100644
--- a/drivers/cpufreq/s5pv210-cpufreq.c
+++ b/drivers/cpufreq/s5pv210-cpufreq.c
@@ -554,10 +554,9 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy)
 static int s5pv210_cpufreq_reboot_notifier_event(struct notifier_block *this,
                                                 unsigned long event, void *ptr)
 {
+       struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(0);
        int ret;
-       struct cpufreq_policy *policy __free(put_cpufreq_policy);

-       policy = cpufreq_cpu_get(0);
        if (!policy) {
                pr_debug("cpufreq: get no policy for cpu0\n");
                return NOTIFY_BAD;

-- 
viresh