for (i = 0; i < NR_CPUS; i++) if (cpu_possible(i)) arch_register_cpu(i);
for_each_cpu(i) arch_register_cpu(i);
static int __init topology_init(void){	int i;	for (i = 0; i < NR_CPUS; i++)		if (cpu_possible(i)) arch_register_cpu(i);	return 0;}