This is a note to let you know that I've just added the patch titled
s390/vdso: copy tod_steering_delta value to vdso_data page
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-vdso-copy-tod_steering_delta-value-to-vdso_data-page.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 72bbc226ed2ef0a46c165a482861fff00dd6d4e1 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@xxxxxxxxxxxxx>
Date: Tue, 23 Mar 2021 21:40:11 +0100
Subject: s390/vdso: copy tod_steering_delta value to vdso_data page
From: Heiko Carstens <hca@xxxxxxxxxxxxx>
commit 72bbc226ed2ef0a46c165a482861fff00dd6d4e1 upstream.
When converting the vdso assembler code to C it was forgotten to
actually copy the tod_steering_delta value to vdso_data page.
Which in turn means that tod clock steering will not work correctly.
Fix this by simply copying the value whenever it is updated.
Fixes: 4bff8cb54502 ("s390: convert to GENERIC_VDSO")
Cc: <stable@xxxxxxxxxxxxxxx> # 5.10
Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/time.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -398,6 +398,7 @@ static void clock_sync_global(unsigned l
tod_steering_delta);
tod_steering_end = now + (abs(tod_steering_delta) << 15);
vdso_data->arch_data.tod_steering_end = tod_steering_end;
+ vdso_data->arch_data.tod_steering_delta = tod_steering_delta;
/* Update LPAR offset. */
if (ptff_query(PTFF_QTO) && ptff(&qto, sizeof(qto), PTFF_QTO) == 0)
Patches currently in stable-queue which might be from hca@xxxxxxxxxxxxx are
queue-5.10/s390-vdso-copy-tod_steering_delta-value-to-vdso_data-page.patch
queue-5.10/s390-vdso-fix-tod_steering_delta-type.patch
