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s390/traps: do not test MONITOR CALL without CONFIG_BUG
author
Ilya Leoshkevich
<iii@linux.ibm.com>
Fri, 2 Jul 2021 13:54:55 +0000
(15:54 +0200)
committer
Vasily Gorbik
<gor@linux.ibm.com>
Thu, 8 Jul 2021 13:37:27 +0000
(15:37 +0200)
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
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diff --git
a/arch/s390/kernel/traps.c
b/arch/s390/kernel/traps.c
index
019c574
..
3a6d08d
100644
(file)
--- 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"