[PATCH 5.12 137/178] s390/mcck: fix calculation of SIE critical section size

Greg Kroah-Hartman
2021-06-21T16:52:38Z

From: Alexander Gordeev <agordeev@linux.ibm.com>

commit 5bcbe3285fb614c49db6b238253f7daff7e66312 upstream.

The size of SIE critical section is calculated wrongly
as result of a missed subtraction in commit 0b0ed657fe00
("s390: remove critical section cleanup from entry.S")

Fixes: 0b0ed657fe00 ("s390: remove critical section cleanup from entry.S")
Cc: <stable@vger.kernel.org>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/s390/kernel/entry.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -651,7 +651,7 @@ ENDPROC(stack_overflow)
.Lcleanup_sie_mcck:
larl %r13,.Lsie_entry
slgr %r9,%r13
- larl %r13,.Lsie_skip
+ lghi %r13,.Lsie_skip - .Lsie_entry
clgr %r9,%r13
jhe .Lcleanup_sie_int
oi __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST