--- linux-2.4.21.orig/arch/ia64/kernel/acpi.c	Thu Jul 31 13:14:21 2003
+++ linux-2.4.21/arch/ia64/kernel/acpi.c	Thu Jul 31 13:42:36 2003
@@ -643,8 +643,9 @@
 		return 0;
 
 	/* Turn it on */
-	vector = iosapic_register_intr(gsi, polarity ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
-			mode ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
+	vector = iosapic_register_intr(gsi,
+		       	(polarity == ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
+			(mode == ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
 	return vector;
 }