#ifndef _LINUX_IRQRETURN_H#define _LINUX_IRQRETURN_H/** * enum irqreturn * @IRQ_NONE interrupt was not from this device * @IRQ_HANDLED interrupt was handled by this device */enumirqreturn{IRQ_NONE,IRQ_HANDLED,};typedefenumirqreturnirqreturn_t;#define IRQ_RETVAL(x) ((x) != IRQ_NONE)#endif