softirq.h

嵌入式系统设计与实例开发实验教材二源码 多线程应用程序设计 串行端口程序设计 AD接口实验 CAN总线通信实验 GPS通信实验 Linux内核移植与编译实验 IC卡读写实验 SD驱动使

#ifndef __ASM_SOFTIRQ_H
#define __ASM_SOFTIRQ_H

#include <asm/atomic.h>
#include <asm/hardirq.h>

#define __cpu_bh_enable(cpu) \
		do { barrier(); local_bh_count(cpu)--; } while (0)
#define cpu_bh_disable(cpu) \
		do { local_bh_count(cpu)++; barrier(); } while (0)

#define local_bh_disable()	cpu_bh_disable(smp_processor_id())
#define __local_bh_enable()	__cpu_bh_enable(smp_processor_id())

#define in_softirq()		(local_bh_count(smp_processor_id()) != 0)

#define local_bh_enable()						\
do {									\
	unsigned int *ptr = &local_bh_count(smp_processor_id());	\
	if (!--*ptr && ptr[-2])						\
		__asm__("bl%? __do_softirq": : : "lr");/* out of line */\
} while (0)

#endif	/* __ASM_SOFTIRQ_H */