diff --git a/arch/ia64/include/asm/hw_irq.h b/arch/ia64/include/asm/hw_irq.h
index 91619b31dbf5f45221cebd092d738426dfbd4da2..bf2e37493e04c6b28544779377cc72d8ce21a2e2 100644
--- a/arch/ia64/include/asm/hw_irq.h
+++ b/arch/ia64/include/asm/hw_irq.h
@@ -59,7 +59,13 @@ typedef u16 ia64_vector;
 extern int ia64_first_device_vector;
 extern int ia64_last_device_vector;
 
+#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_DIG))
+/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
+#define IA64_IRQ_MOVE_VECTOR		0x30	/* "move IRQ" IPI */
+#define IA64_DEF_FIRST_DEVICE_VECTOR	0x31
+#else
 #define IA64_DEF_FIRST_DEVICE_VECTOR	0x30
+#endif
 #define IA64_DEF_LAST_DEVICE_VECTOR	0xe7
 #define IA64_FIRST_DEVICE_VECTOR	ia64_first_device_vector
 #define IA64_LAST_DEVICE_VECTOR		ia64_last_device_vector
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index dd9d7b54f1a1f59f0a04a10a3ad6386d94f16472..181a9344e67b2182f1b573e66bcea4354b8a5dca 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -260,7 +260,6 @@ void __setup_vector_irq(int cpu)
 }
 
 #if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG))
-#define IA64_IRQ_MOVE_VECTOR	IA64_DEF_FIRST_DEVICE_VECTOR
 
 static enum vector_domain_type {
 	VECTOR_DOMAIN_NONE,
@@ -659,11 +658,8 @@ init_IRQ (void)
 	register_percpu_irq(IA64_SPURIOUS_INT_VECTOR, NULL);
 #ifdef CONFIG_SMP
 #if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_DIG)
-	if (vector_domain_type != VECTOR_DOMAIN_NONE) {
-		BUG_ON(IA64_FIRST_DEVICE_VECTOR != IA64_IRQ_MOVE_VECTOR);
-		IA64_FIRST_DEVICE_VECTOR++;
+	if (vector_domain_type != VECTOR_DOMAIN_NONE)
 		register_percpu_irq(IA64_IRQ_MOVE_VECTOR, &irq_move_irqaction);
-	}
 #endif
 #endif
 #ifdef CONFIG_PERFMON