| Message ID | 20220123183925.1052919-17-yury.norov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On Sun, Jan 23, 2022 at 10:38:47AM -0800, Yury Norov wrote: > drivers/cpufreq calls cpumask_weight() to check if any bit of a given > cpumask is set. We can do it more efficiently with cpumask_empty() because > cpumask_empty() stops traversing the cpumask as soon as it finds first set > bit, while cpumask_weight() counts all bits unconditionally. > Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> (for SCMI cpufreq driver)
On 23-01-22, 10:38, Yury Norov wrote: > drivers/cpufreq calls cpumask_weight() to check if any bit of a given > cpumask is set. We can do it more efficiently with cpumask_empty() because > cpumask_empty() stops traversing the cpumask as soon as it finds first set > bit, while cpumask_weight() counts all bits unconditionally. > > Signed-off-by: Yury Norov <yury.norov@gmail.com> > --- > drivers/cpufreq/qcom-cpufreq-hw.c | 2 +- > drivers/cpufreq/scmi-cpufreq.c | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) Applied. Thanks.
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index 05f3d7876e44..95a0c57ab5bb 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -482,7 +482,7 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) } qcom_get_related_cpus(index, policy->cpus); - if (!cpumask_weight(policy->cpus)) { + if (cpumask_empty(policy->cpus)) { dev_err(dev, "Domain-%d failed to get related CPUs\n", index); ret = -ENOENT; goto error; diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 1e0cd4d165f0..919fa6e3f462 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -154,7 +154,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) * table and opp-shared. */ ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, priv->opp_shared_cpus); - if (ret || !cpumask_weight(priv->opp_shared_cpus)) { + if (ret || cpumask_empty(priv->opp_shared_cpus)) { /* * Either opp-table is not set or no opp-shared was found. * Use the CPU mask from SCMI to designate CPUs sharing an OPP
drivers/cpufreq calls cpumask_weight() to check if any bit of a given cpumask is set. We can do it more efficiently with cpumask_empty() because cpumask_empty() stops traversing the cpumask as soon as it finds first set bit, while cpumask_weight() counts all bits unconditionally. Signed-off-by: Yury Norov <yury.norov@gmail.com> --- drivers/cpufreq/qcom-cpufreq-hw.c | 2 +- drivers/cpufreq/scmi-cpufreq.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)