#undef TRACE_SYSTEM
  #define TRACE_SYSTEM irq
  
  #if !defined(_TRACE_IRQ_H) || defined(TRACE_HEADER_MULTI_READ)
  #define _TRACE_IRQ_H
  
  #include <linux/tracepoint.h>
  
  struct irqaction;
  struct softirq_action;
  
  #define softirq_name(sirq) { sirq##_SOFTIRQ, #sirq }
  #define show_softirq_name(val)				\
  	__print_symbolic(val,				\
  			 softirq_name(HI),		\
  			 softirq_name(TIMER),		\
  			 softirq_name(NET_TX),		\
  			 softirq_name(NET_RX),		\
  			 softirq_name(BLOCK),		\
  			 softirq_name(BLOCK_IOPOLL),	\
  			 softirq_name(TASKLET),		\
  			 softirq_name(SCHED),		\
  			 softirq_name(HRTIMER),		\
  			 softirq_name(RCU))
  
  /**
   * irq_handler_entry - called immediately before the irq action handler
   * @irq: irq number
   * @action: pointer to struct irqaction
   *
   * The struct irqaction pointed to by @action contains various
   * information about the handler, including the device name,
   * @action->name, and the device id, @action->dev_id. When used in
   * conjunction with the irq_handler_exit tracepoint, we can figure
   * out irq handler latencies.
   */
  TRACE_EVENT(irq_handler_entry,
  
  	TP_PROTO(int irq, struct irqaction *action),
  
  	TP_ARGS(irq, action),
  
  	TP_STRUCT__entry(
  		__field(	int,	irq		)
  		__string(	name,	action->name	)
  	),
  
  	TP_fast_assign(
  		__entry->irq = irq;
  		__assign_str(name, action->name);
  	),
  
  	TP_printk("irq=%d name=%s", __entry->irq, __get_str(name))
  );
  
  /**
   * irq_handler_exit - called immediately after the irq action handler returns
   * @irq: irq number
   * @action: pointer to struct irqaction
   * @ret: return value
   *
   * If the @ret value is set to IRQ_HANDLED, then we know that the corresponding
   * @action->handler scuccessully handled this irq. Otherwise, the irq might be
   * a shared irq line, or the irq was not handled successfully. Can be used in
   * conjunction with the irq_handler_entry to understand irq handler latencies.
   */
  TRACE_EVENT(irq_handler_exit,
  
  	TP_PROTO(int irq, struct irqaction *action, int ret),
  
  	TP_ARGS(irq, action, ret),
  
  	TP_STRUCT__entry(
  		__field(	int,	irq	)
  		__field(	int,	ret	)
  	),
  
  	TP_fast_assign(
  		__entry->irq	= irq;
  		__entry->ret	= ret;
  	),
  
  	TP_printk("irq=%d ret=%s",
  		  __entry->irq, __entry->ret ? "handled" : "unhandled")
  );
  
  DECLARE_EVENT_CLASS(softirq,
  
  	TP_PROTO(unsigned int vec_nr),
  
  	TP_ARGS(vec_nr),
  
  	TP_STRUCT__entry(
  		__field(	unsigned int,	vec	)
  	),
  
  	TP_fast_assign(
  		__entry->vec = vec_nr;
  	),
  
  	TP_printk("vec=%u [action=%s]", __entry->vec,
  		  show_softirq_name(__entry->vec))
  );
  
  /**
   * softirq_entry - called immediately before the softirq handler
   * @vec_nr:  softirq vector number
   *
   * When used in combination with the softirq_exit tracepoint
   * we can determine the softirq handler runtine.
   */
  DEFINE_EVENT(softirq, softirq_entry,
  
  	TP_PROTO(unsigned int vec_nr),
  
  	TP_ARGS(vec_nr)
  );
  
  /**
   * softirq_exit - called immediately after the softirq handler returns
   * @vec_nr:  softirq vector number
   *
   * When used in combination with the softirq_entry tracepoint
   * we can determine the softirq handler runtine.
   */
  DEFINE_EVENT(softirq, softirq_exit,
  
  	TP_PROTO(unsigned int vec_nr),
  
  	TP_ARGS(vec_nr)
  );
  
  /**
   * softirq_raise - called immediately when a softirq is raised
   * @vec_nr:  softirq vector number
   *
   * When used in combination with the softirq_entry tracepoint
   * we can determine the softirq raise to run latency.
   */
  DEFINE_EVENT(softirq, softirq_raise,
  
  	TP_PROTO(unsigned int vec_nr),
  
  	TP_ARGS(vec_nr)
  );
  
  #endif /*  _TRACE_IRQ_H */
  
  /* This part must be outside protection */
  #include <trace/define_trace.h>