From 2f3778be288b454f98c1c3fee44fb4bf7f9d299f Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Thu, 14 Oct 2021 17:30:15 +0800 Subject: [PATCH] s390/traps: do not test MONITOR CALL without CONFIG_BUG stable inclusion from stable-5.10.53 commit be10fff3a4612c21e92405bce52132bad39c093a bugzilla: 175574 https://gitee.com/openeuler/kernel/issues/I4DTUX Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=be10fff3a4612c21e92405bce52132bad39c093a -------------------------------- [ Upstream commit b8e9cc20b808e26329090c19ff80b7f5098e98ff ] 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 Reviewed-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin Signed-off-by: Chen Jun Acked-by: Weilong Chen Signed-off-by: Chen Jun Signed-off-by: Zheng Zengkai --- 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 8d1e8a1a97df..16934fa19069 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -272,6 +272,8 @@ 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" -- GitLab