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-rw-r--r--include/linux/irqnr.h40
1 files changed, 31 insertions, 9 deletions
diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index 452c280c8115..86af92e9e84c 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -1,24 +1,46 @@
#ifndef _LINUX_IRQNR_H
#define _LINUX_IRQNR_H
+/*
+ * Generic irq_desc iterators:
+ */
+#ifdef __KERNEL__
+
#ifndef CONFIG_GENERIC_HARDIRQS
#include <asm/irq.h>
-# define nr_irqs NR_IRQS
+
+/*
+ * Wrappers for non-genirq architectures:
+ */
+#define nr_irqs NR_IRQS
+#define irq_to_desc(irq) (&irq_desc[irq])
# define for_each_irq_desc(irq, desc) \
for (irq = 0; irq < nr_irqs; irq++)
-#else
+
+# define for_each_irq_desc_reverse(irq, desc) \
+ for (irq = nr_irqs - 1; irq >= 0; irq--)
+#else /* CONFIG_GENERIC_HARDIRQS */
+
extern int nr_irqs;
+extern struct irq_desc *irq_to_desc(unsigned int irq);
+
+# define for_each_irq_desc(irq, desc) \
+ for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs; \
+ irq++, desc = irq_to_desc(irq)) \
+ if (desc)
-# define for_each_irq_desc(irq, desc) \
- for (irq = 0, desc = irq_desc; irq < nr_irqs; irq++, desc++)
# define for_each_irq_desc_reverse(irq, desc) \
- for (irq = nr_irqs - 1, desc = irq_desc + (nr_irqs - 1); \
- irq >= 0; irq--, desc--)
-#endif
+ for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0; \
+ irq--, desc = irq_to_desc(irq)) \
+ if (desc)
-#define for_each_irq_nr(irq) \
- for (irq = 0; irq < nr_irqs; irq++)
+#endif /* CONFIG_GENERIC_HARDIRQS */
+
+#define for_each_irq_nr(irq) \
+ for (irq = 0; irq < nr_irqs; irq++)
+
+#endif /* __KERNEL__ */
#endif
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