for(;;) __asm__("hlt");
for(;;) halt();
static void stop_this_cpu (void * dummy){	/*	 * Remove this CPU:	 */	cpu_clear(smp_processor_id(), cpu_online_map);	local_irq_disable();	disable_local_APIC();	if (cpu_data[smp_processor_id()].hlt_works_ok)		for(;;) __asm__("hlt");	for (;;);}