Index: kernel/generic/include/ipc/irq.h
===================================================================
--- kernel/generic/include/ipc/irq.h	(revision f044e96c50752824a763e9b11ea00b026e7c0772)
+++ kernel/generic/include/ipc/irq.h	(revision 472d813eb1dc68bae20fc6383ca3221f169fd0b7)
@@ -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