per_cpu_index_dev
#define per_cache_index_dev(cpu, idx) ((per_cpu_index_dev(cpu))[idx])
if (per_cpu_index_dev(cpu)) {
kfree(per_cpu_index_dev(cpu));
per_cpu_index_dev(cpu) = NULL;
per_cpu_index_dev(cpu) = kzalloc_objs(struct device *,
if (unlikely(per_cpu_index_dev(cpu) == NULL))