Index: kernel/generic/include/ipc/irq.h
===================================================================
--- kernel/generic/include/ipc/irq.h	(revision 96b02eb9b2f96f3843b8275c254c43a9cb6c8c88)
+++ kernel/generic/include/ipc/irq.h	(revision 00aece0f4f90a094c54cb53169457a54b87db366)
@@ -36,5 +36,8 @@
 #define KERN_IPC_IRQ_H_
 
-/** Maximum length of IPC IRQ program */
+/** Maximum number of IPC IRQ programmed I/O ranges. */
+#define IRQ_MAX_RANGE_COUNT	8
+
+/** Maximum length of IPC IRQ program. */
 #define IRQ_MAX_PROG_SIZE  20