#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;typedefvoid(*irq_flow_handler_t)(struct irq_desc *desc);typedefvoid(*irq_preflow_handler_t)(struct irq_data *data);#endif