[PATCH v1 06/10] cpufreq: Use locking guard and __free() in cpufreq_update_policy()

Rafael J. Wysocki
2025-03-28T20:58:49Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Instead of using cpufreq_cpu_acquire() and cpufreq_cpu_release() in
cpufreq_update_policy(), which is the last user of these functions,
make it use __free() for policy reference counting cleanup and the
"write" locking guard for policy locking.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpufreq/cpufreq.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -2752,23 +2752,23 @@
*/
void cpufreq_update_policy(unsigned int cpu)
{
- struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
+ struct cpufreq_policy *policy __free(put_cpufreq_policy);

+ policy = cpufreq_cpu_get(cpu);
if (!policy)
return;

+ guard(cpufreq_policy_write)(policy);
+
/*
* BIOS might change freq behind our back
* -> ask driver for current freq and notify governors about a change
*/
if (cpufreq_driver->get && has_target() &&
(cpufreq_suspended || WARN_ON(!cpufreq_verify_current_freq(policy, false))))
- goto unlock;
+ return;

refresh_frequency_limits(policy);
-
-unlock:
- cpufreq_cpu_release(policy);
}
EXPORT_SYMBOL(cpufreq_update_policy);