if (cpu) set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);
__cpuinit void numa_add_cpu(int cpu){	/* BP is initialized elsewhere */	if (cpu) 		set_bit(cpu, &node_to_cpumask[cpu_to_node(cpu)]);} 