include/linux/irqnr.h

   1 #ifndef _LINUX_IRQNR_H
   2 #define _LINUX_IRQNR_H
   3
   4 /*
   5  * Generic irq_desc iterators:
   6  */
   7 #ifdef __KERNEL__
   8
   9 #ifndef CONFIG_GENERIC_HARDIRQS
  10 #include <asm/irq.h>
  11 # define nr_irqs                NR_IRQS
  12
  13 # define for_each_irq_desc(irq, desc)           \
  14         for (irq = 0; irq < nr_irqs; irq++)
  15
  16 # define for_each_irq_desc_reverse(irq, desc)                          \
  17         for (irq = nr_irqs - 1; irq >= 0; irq--)
  18 #else /* CONFIG_GENERIC_HARDIRQS */
  19
  20 extern int nr_irqs;
  21 extern struct irq_desc *irq_to_desc(unsigned int irq);
  22
  23 # define for_each_irq_desc(irq, desc)                                   \
  24         for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
  25              irq++, desc = irq_to_desc(irq))                            \
  26                 if (desc)
  27
  28
  29 # define for_each_irq_desc_reverse(irq, desc)                           \
  30         for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0;      \
  31              irq--, desc = irq_to_desc(irq))                            \
  32                 if (desc)
  33
  34 #endif /* CONFIG_GENERIC_HARDIRQS */
  35
  36 #define for_each_irq_nr(irq)                   \
  37        for (irq = 0; irq < nr_irqs; irq++)
  38
  39 #endif /* __KERNEL__ */
  40
  41 #endif