s390/mcck: fix calculation of SIE critical section size

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>

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 81c458e..963e8cb 100644 (file)
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -1284,7 +1284,7 @@ ENDPROC(stack_overflow)
        je      1f
        larl    %r13,.Lsie_entry
        slgr    %r9,%r13
-       larl    %r13,.Lsie_skip
+       lghi    %r13,.Lsie_skip - .Lsie_entry
        clgr    %r9,%r13
        jh      1f
        oi      __LC_CPU_FLAGS+7, _CIF_MCCK_GUEST