diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index ab19ddb09d65..2ec5f1e0312f 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -507,6 +507,7 @@ static void __init setup_lowcore_dat_on(void)
 {
 	struct lowcore *abs_lc;
 	unsigned long flags;
+	int i;
 
 	__ctl_clear_bit(0, 28);
 	S390_lowcore.external_new_psw.mask |= PSW_MASK_DAT;
@@ -521,8 +522,8 @@ static void __init setup_lowcore_dat_on(void)
 	abs_lc = get_abs_lowcore(&flags);
 	abs_lc->restart_flags = RESTART_FLAG_CTLREGS;
 	abs_lc->program_new_psw = S390_lowcore.program_new_psw;
-	memcpy(abs_lc->cregs_save_area, S390_lowcore.cregs_save_area,
-	       sizeof(abs_lc->cregs_save_area));
+	for (i = 0; i < 16; i++)
+		abs_lc->cregs_save_area[i] = S390_lowcore.cregs_save_area[i];
 	put_abs_lowcore(abs_lc, flags);
 }