diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index ab70d9b..ca114fe 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -1348,7 +1348,7 @@
 /*
  * Reset STP attachment.
  */
-static void stp_reset(void)
+static void __init stp_reset(void)
 {
 	int rc;