group_cpus_evenly
masks = group_cpus_evenly(qmap->nr_queues, &nr_masks);
struct cpumask *result = group_cpus_evenly(this_vecs, &nr_masks);
masks = group_cpus_evenly(fs->num_request_queues, &nr_masks);
struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks);
struct cpumask *result = group_cpus_evenly(this_vecs, &nr_masks);
EXPORT_SYMBOL_GPL(group_cpus_evenly);