hardirq.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- #ifndef __ASM_HARDIRQ_H
- #define __ASM_HARDIRQ_H
- /* only non-SMP supported */
- #include <linux/threads.h>
- /* entry.S is sensitive to the offsets of these fields */
- typedef struct {
- unsigned int __softirq_pending;
- unsigned int __local_irq_count;
- unsigned int __local_bh_count;
- unsigned int __syscall_count;
- struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
- } ____cacheline_aligned irq_cpustat_t;
- #include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
- /*
- * Are we in an interrupt context? Either doing bottom half
- * or hardware interrupt processing?
- */
- #define in_interrupt() ((local_irq_count(smp_processor_id()) +
- local_bh_count(smp_processor_id())) != 0)
- #define in_irq() (local_irq_count(smp_processor_id()) != 0)
- #define hardirq_trylock(cpu) (local_irq_count(cpu) == 0)
- #define hardirq_endlock(cpu) do { (void)(cpu); } while (0)
- #define irq_enter(cpu) (local_irq_count(cpu)++)
- #define irq_exit(cpu) (local_irq_count(cpu)--)
- #define synchronize_irq() barrier()
- #endif /* __ASM_HARDIRQ_H */