LXR linux/include/linux/irqreturn.h

   1/* irqreturn.h */
   2#ifndef _LINUX_IRQRETURN_H
   3#define _LINUX_IRQRETURN_H
   4
   5/*
   6 * For 2.4.x compatibility, 2.4.x can use
   7 *
   8 *      typedef void irqreturn_t;
   9 *      #define IRQ_NONE
  10 *      #define IRQ_HANDLED
  11 *      #define IRQ_RETVAL(x)
  12 *
  13 * To mix old-style and new-style irq handler returns.
  14 *
  15 * IRQ_NONE means we didn't handle it.
  16 * IRQ_HANDLED means that we did have a valid interrupt and handled it.
  17 * IRQ_RETVAL(x) selects on the two depending on x being non-zero (for handled)
  18 */
  19typedef int irqreturn_t;
  20
  21#define IRQ_NONE        (0)
  22#define IRQ_HANDLED     (1)
  23#define IRQ_RETVAL(x)   ((x) != 0)
  24
  25#endif
  26