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Unix_Linux

softirq.h：源码内容

							#ifndef __M68K_SOFTIRQ_H
#define __M68K_SOFTIRQ_H
/*
 * Software interrupts.. no SMP here either.
 */
#include <asm/atomic.h>
#define cpu_bh_disable(cpu)	do { local_bh_count(cpu)++; barrier(); } while (0)
#define cpu_bh_enable(cpu)	do { barrier(); local_bh_count(cpu)--; } while (0)
#define local_bh_disable()	cpu_bh_disable(smp_processor_id())
#define local_bh_enable()	cpu_bh_enable(smp_processor_id())
#define __local_bh_enable()     local_bh_enable()			  
#define in_softirq() (local_bh_count(smp_processor_id()) != 0)
#endif

						