On Wed, 3 Sep 2025 21:17:27 +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 one is a little more weak wrt to justification. Kernel style
isn't to use __free() where there isn't a significant benefit.
Up to maintainer of the driver on this one so I'll not offer
a tag.
> ---
> drivers/cpufreq/powernv-cpufreq.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
> index 7d9a5f656de8..811fdbf398fa 100644
> --- a/drivers/cpufreq/powernv-cpufreq.c
> +++ b/drivers/cpufreq/powernv-cpufreq.c
> @@ -892,15 +892,15 @@ static int powernv_cpufreq_reboot_notifier(struct notifier_block *nb,
> unsigned long action, void *unused)
> {
> int cpu;
> - struct cpufreq_policy *cpu_policy;
>
> rebooting = true;
> for_each_online_cpu(cpu) {
> - cpu_policy = cpufreq_cpu_get(cpu);
> + struct cpufreq_policy *cpu_policy __free(put_cpufreq_policy) =
> + cpufreq_cpu_get(cpu);
> +
> if (!cpu_policy)
> continue;
> powernv_cpufreq_target_index(cpu_policy, get_nominal_index());
> - cpufreq_cpu_put(cpu_policy);
> }
>
> return NOTIFY_DONE;
> @@ -913,7 +913,6 @@ static struct notifier_block powernv_cpufreq_reboot_nb = {
> static void powernv_cpufreq_work_fn(struct work_struct *work)
> {
> struct chip *chip = container_of(work, struct chip, throttle);
> - struct cpufreq_policy *policy;
> unsigned int cpu;
> cpumask_t mask;
>
> @@ -928,14 +927,14 @@ static void powernv_cpufreq_work_fn(struct work_struct *work)
> chip->restore = false;
> for_each_cpu(cpu, &mask) {
> int index;
> + struct cpufreq_policy *policy __free(put_cpufreq_policy) =
> + cpufreq_cpu_get(cpu);
>
> - policy = cpufreq_cpu_get(cpu);
> if (!policy)
> continue;
> index = cpufreq_table_find_index_c(policy, policy->cur, false);
> powernv_cpufreq_target_index(policy, index);
> cpumask_andnot(&mask, &mask, policy->cpus);
> - cpufreq_cpu_put(policy);
> }
> out:
> cpus_read_unlock();