#ifndef __ASM_SOFTIRQ_H #define __ASM_SOFTIRQ_H #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) /* * NOTE: this assembly code assumes: * * (char *)&local_bh_count - 8 == (char *)&softirq_pending * * If you change the offsets in irq_stat then you have to * update this code as well. */ #define local_bh_enable() \ do { \ unsigned int *ptr = &local_bh_count(smp_processor_id()); \ \ barrier(); \ if (!--*ptr) \ __asm__ __volatile__ ( \ "cmpl $0, -8(%0);" \ "jnz 2f;" \ "1:;" \ LOCK_SECTION_START("") \ "2:" \ "call do_softirq_thunk;" \ "" \ "jmp 1b;" \ LOCK_SECTION_END \ : /* no output */ \ : "r" (ptr) \ /* no registers clobbered */ ); \ } while (0) #endif /* __ASM_SOFTIRQ_H */