diff --git a/arch/mips/au1000/pb1550/irqmap.c b/arch/mips/au1000/pb1550/irqmap.c
index 47c7a1c..24a9d18 100644
--- a/arch/mips/au1000/pb1550/irqmap.c
+++ b/arch/mips/au1000/pb1550/irqmap.c
@@ -52,9 +52,9 @@
  [13] =	{ -1, INTA, INTB, INTC, INTD},   /* IDSEL 13 - PCI slot 1 (right) */
 };
 
-au1xxx_irq_map_t au1xxx_irq_map[] = {
+au1xxx_irq_map_t __initdata au1xxx_irq_map[] = {
 	{ AU1000_GPIO_0, INTC_INT_LOW_LEVEL, 0 },
 	{ AU1000_GPIO_1, INTC_INT_LOW_LEVEL, 0 },
 };
 
-int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
+int __initdata au1xxx_nr_irqs = ARRAY_SIZE(au1xxx_irq_map);