1. 根目录:
2. arch
3. cris
4. include
5. asm
6. smp.h

#ifndef __ASM_SMP_H
#define __ASM_SMP_H

#include <linux/cpumask.h>

extern cpumask_t phys_cpu_present_map;

#define raw_smp_processor_id() (current_thread_info()->cpu)

#endif