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Prerequisite commit for Add support for AArch64 AMUv1-based average freq #155

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base: opensource-lts_upgrade_6.6.151-2026-08-21_20-50-15
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Prerequisite commit for Add support for AArch64 AMUv1-based average freq #155

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22 changes: 10 additions & 12 deletions arch/arm64/kernel/topology.c
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Original file line number Diff line number Diff line change
Expand Up @@ -356,12 +356,19 @@ static void amu_fie_setup(const struct cpumask *cpus)
int cpu;

/* We are already set since the last insmod of cpufreq driver */
if (unlikely(cpumask_subset(cpus, amu_fie_cpus)))
if (cpumask_available(amu_fie_cpus) &&
unlikely(cpumask_subset(cpus, amu_fie_cpus)))
return;

for_each_cpu(cpu, cpus) {
for_each_cpu(cpu, cpus)
if (!freq_counters_valid(cpu))
return;

if (!cpumask_available(amu_fie_cpus) &&
!zalloc_cpumask_var(&amu_fie_cpus, GFP_KERNEL)) {
WARN_ONCE(1, "Failed to allocate FIE cpumask for CPUs[%*pbl]\n",
cpumask_pr_args(cpus));
return;
}

cpumask_or(amu_fie_cpus, amu_fie_cpus, cpus);
Expand Down Expand Up @@ -399,17 +406,8 @@ static struct notifier_block init_amu_fie_notifier = {

static int __init init_amu_fie(void)
{
int ret;

if (!zalloc_cpumask_var(&amu_fie_cpus, GFP_KERNEL))
return -ENOMEM;

ret = cpufreq_register_notifier(&init_amu_fie_notifier,
return cpufreq_register_notifier(&init_amu_fie_notifier,
CPUFREQ_POLICY_NOTIFIER);
if (ret)
free_cpumask_var(amu_fie_cpus);

return ret;
}
core_initcall(init_amu_fie);

Expand Down