diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index fe8e54b9ef7d..12640f7e726b 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -50,24 +50,14 @@ do
 	done
 
 	# ignore register save/restore funcitons
-	if [ "${UNDEF:0:9}" = "_restgpr_" ]; then
+	case $UNDEF in
+	_restgpr_*|_restgpr0_*|_rest32gpr_*)
 		OK=1
-	fi
-	if [ "${UNDEF:0:10}" = "_restgpr0_" ]; then
+		;;
+	_savegpr_*|_savegpr0_*|_save32gpr_*)
 		OK=1
-	fi
-	if [ "${UNDEF:0:11}" = "_rest32gpr_" ]; then
-		OK=1
-	fi
-	if [ "${UNDEF:0:9}" = "_savegpr_" ]; then
-		OK=1
-	fi
-	if [ "${UNDEF:0:10}" = "_savegpr0_" ]; then
-		OK=1
-	fi
-	if [ "${UNDEF:0:11}" = "_save32gpr_" ]; then
-		OK=1
-	fi
+		;;
+	esac
 
 	if [ $OK -eq 0 ]; then
 		ERROR=1