[PATCH 07/15] cpufreq: ondemand: Simplify idle cputime granularity test
From: Frederic Weisbecker <frederic@kernel.org>
Date: 2026-01-16 14:53:11
Also in:
linux-pm, linux-s390, lkml
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
cpufreq calls get_cpu_idle_time_us() just to know if idle cputime accounting has a nanoseconds granularity. Use the appropriate indicator instead to make that deduction. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> --- drivers/cpufreq/cpufreq_ondemand.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index a6ecc203f7b7..2d52ee035702 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c@@ -334,17 +334,12 @@ static void od_free(struct policy_dbs_info *policy_dbs) static int od_init(struct dbs_data *dbs_data) { struct od_dbs_tuners *tuners; - u64 idle_time; - int cpu; tuners = kzalloc(sizeof(*tuners), GFP_KERNEL); if (!tuners) return -ENOMEM; - cpu = get_cpu(); - idle_time = get_cpu_idle_time_us(cpu, NULL); - put_cpu(); - if (idle_time != -1ULL) { + if (tick_nohz_enabled) { /* Idle micro accounting is supported. Use finer thresholds */ dbs_data->up_threshold = MICRO_FREQUENCY_UP_THRESHOLD; } else {
--
2.51.1