irqhandler.h
#ifndef _LINUX_IRQHANDLER_H
#define _LINUX_IRQHANDLER_H
/*
* Interrupt flow handler typedefs are defined here to avoid circular
* include dependencies.
*/
struct irq_desc;
struct irq_data;
typedef void (*irq_flow_handler_t)(unsigned int irq, struct irq_desc *desc);
typedef void (*irq_preflow_handler_t)(struct irq_data *data);
#endif