Index: kernel/generic/include/ipc/irq.h
===================================================================
--- kernel/generic/include/ipc/irq.h	(revision 69114714b32f8575a7def8ac202a1d78e12f43f1)
+++ kernel/generic/include/ipc/irq.h	(revision 2cc7f1601bf37a38c6fbe566c6f941f3ffef337e)
@@ -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