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s390/traps: do not test MONITOR CALL without CONFIG_BUG

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[ Upstream commit b8e9cc20b8 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ilya Leoshkevich 2021-07-02 15:54:55 +02:00 • committed by Greg Kroah-Hartman
commit be10fff3a4
1 changed files with 2 additions and 0 deletions
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2
arch/s390/kernel/traps.c
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@ -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"