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Unix_Linux

softirq.h：源码内容

							#ifndef _ALPHA_SOFTIRQ_H
#define _ALPHA_SOFTIRQ_H
#include <linux/stddef.h>
#include <asm/atomic.h>
#include <asm/hardirq.h>
extern inline void cpu_bh_disable(int cpu)
{
	local_bh_count(cpu)++;
	barrier();
}
extern inline void __cpu_bh_enable(int cpu)
{
	barrier();
	local_bh_count(cpu)--;
}
#define __local_bh_enable()	__cpu_bh_enable(smp_processor_id())
#define local_bh_disable()	cpu_bh_disable(smp_processor_id())
#define local_bh_enable()					
do {								
	int cpu;						
								
	barrier();						
	cpu = smp_processor_id();				
	if (!--local_bh_count(cpu) && softirq_pending(cpu))	
		do_softirq();					
} while (0)
#define in_softirq() (local_bh_count(smp_processor_id()) != 0)
#endif /* _ALPHA_SOFTIRQ_H */

						