ARM 嵌入式 系统 设计与实例开发 实验教材 二源码
源代码在线查看： softirq.h
/* * include/asm-s390/softirq.h * * S390 version * * Derived from "include/asm-i386/softirq.h" */ #ifndef __ASM_SOFTIRQ_H #define __ASM_SOFTIRQ_H #ifndef __LINUX_SMP_H #include #endif #include #include #include #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) extern void do_call_softirq(void); #define local_bh_enable() \ do { \ unsigned int *ptr = &local_bh_count(smp_processor_id()); \ barrier(); \ if (!--*ptr) \ if (softirq_pending(smp_processor_id())) \ /* Use the async. stack for softirq */ \ do_call_softirq(); \ } while (0) #endif /* __ASM_SOFTIRQ_H */
