On Wed, 3 Sep 2025 21:17:31 +0800
Zihuan Zhang <zhangzihuan@kylinos.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@kylinos.cn>
This radically changes the lifetime of the reference to policy.
If that is valid, then I'd expect a lot more description of why!
> ---
> drivers/thermal/imx_thermal.c | 14 +++++---------
> 1 file changed, 5 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
> index 38c993d1bcb3..cd1d9d419275 100644
> --- a/drivers/thermal/imx_thermal.c
> +++ b/drivers/thermal/imx_thermal.c
> @@ -201,7 +201,6 @@ static struct thermal_soc_data thermal_imx7d_data = {
>
> struct imx_thermal_data {
> struct device *dev;
> - struct cpufreq_policy *policy;
> struct thermal_zone_device *tz;
> struct thermal_cooling_device *cdev;
> struct regmap *tempmon;
> @@ -541,22 +540,20 @@ MODULE_DEVICE_TABLE(of, of_imx_thermal_match);
> static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
> {
> struct device_node *np;
> + struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(0);
> int ret = 0;
>
> - data->policy = cpufreq_cpu_get(0);
> - if (!data->policy) {
> + if (!policy) {
> pr_debug("%s: CPUFreq policy not found\n", __func__);
> return -EPROBE_DEFER;
> }
>
> - np = of_get_cpu_node(data->policy->cpu, NULL);
> + np = of_get_cpu_node(policy->cpu, NULL);
>
> if (!np || !of_property_present(np, "#cooling-cells")) {
> - data->cdev = cpufreq_cooling_register(data->policy);
> - if (IS_ERR(data->cdev)) {
> + data->cdev = cpufreq_cooling_register(policy);
> + if (IS_ERR(data->cdev))
> ret = PTR_ERR(data->cdev);
> - cpufreq_cpu_put(data->policy);
> - }
> }
>
> of_node_put(np);
> @@ -567,7 +564,6 @@ static int imx_thermal_register_legacy_cooling(struct imx_thermal_data *data)
> static void imx_thermal_unregister_legacy_cooling(struct imx_thermal_data *data)
> {
> cpufreq_cooling_unregister(data->cdev);
> - cpufreq_cpu_put(data->policy);
> }
>
> #else