unsigned int cpu = smp_processor_id();
unsigned int cpu;  cpu = smp_processor_id();
int start_secondary(void *unused){	unsigned int cpu = smp_processor_id();	atomic_inc(&init_mm.mm_count);	current->active_mm = &init_mm;	smp_store_cpu_info(cpu);	__smp_slave_init(cpu);	per_cpu_trap_init();		atomic_inc(&cpus_booted);	cpu_idle();	return 0;}