From b8e9cc20b808e26329090c19ff80b7f5098e98ff Mon Sep 17 00:00:00 2001
From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Fri, 2 Jul 2021 15:54:55 +0200
Subject: [PATCH] s390/traps: do not test MONITOR CALL without CONFIG_BUG
tinyconfig fails to boot, because without CONFIG_BUG report_bug()
always returns BUG_TRAP_TYPE_BUG, which causes mc 0,0 in
test_monitor_call() to panic. Fix by skipping the test without
CONFIG_BUG.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
arch/s390/kernel/traps.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 019c5748b6073..3a6d08d6df6f0 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -277,6 +277,8 @@ static void __init test_monitor_call(void)
{
int val = 1;
+ if (!IS_ENABLED(CONFIG_BUG))
+ return;
asm volatile(
" mc 0,0\n"
"0: xgr %0,%0\n"
--
2.30.2