sched_numa_find_nth_cpu
int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node);
EXPORT_SYMBOL_GPL(sched_numa_find_nth_cpu);
cpu = sched_numa_find_nth_cpu(mask, 0, cpu_to_node(cpu));
cpu = sched_numa_find_nth_cpu(cpu_online_mask, i, node);