This is a note to let you know that I've just added the patch titled
Revert "s390/smp: enforce lowcore protection on CPU restart"
to the 5.15-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:
revert-s390-smp-enforce-lowcore-protection-on-cpu-restart.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 953503751a426413ea8aee2299ae3ee971b70d9b Mon Sep 17 00:00:00 2001
From: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Date: Sat, 6 Aug 2022 09:29:46 +0200
Subject: Revert "s390/smp: enforce lowcore protection on CPU restart"
From: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
commit 953503751a426413ea8aee2299ae3ee971b70d9b upstream.
This reverts commit 6f5c672d17f583b081e283927f5040f726c54598.
This breaks normal crash dump when CPU0 is offline.
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/setup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -507,8 +507,8 @@ static void __init setup_lowcore_dat_on(
S390_lowcore.svc_new_psw.mask |= PSW_MASK_DAT;
S390_lowcore.program_new_psw.mask |= PSW_MASK_DAT;
S390_lowcore.io_new_psw.mask |= PSW_MASK_DAT;
- __ctl_set_bit(0, 28);
__ctl_store(S390_lowcore.cregs_save_area, 0, 15);
+ __ctl_set_bit(0, 28);
put_abs_lowcore(restart_flags, RESTART_FLAG_CTLREGS);
put_abs_lowcore(program_new_psw, lc->program_new_psw);
for (cr = 0; cr < ARRAY_SIZE(lc->cregs_save_area); cr++)
Patches currently in stable-queue which might be from agordeev@xxxxxxxxxxxxx are
queue-5.15/s390-crash-fix-incorrect-number-of-bytes-to-copy-to-.patch
queue-5.15/s390-dump-fix-old-lowcore-virtual-vs-physical-addres.patch
queue-5.15/s390-smp-cleanup-control-register-update-routines.patch
queue-5.15/s390-smp-cleanup-target-cpu-callback-starting.patch
queue-5.15/s390-maccess-fix-semantics-of-memcpy_real-and-its-ca.patch
queue-5.15/revert-s390-smp-enforce-lowcore-protection-on-cpu-restart.patch
queue-5.15/s390-smp-enforce-lowcore-protection-on-cpu-restart.patch
queue-5.15/s390-zcore-fix-race-when-reading-from-hardware-syste.patch
queue-5.15/s390-dump-fix-os_info-virtual-vs-physical-address-co.patch
queue-5.15/s390-maccess-rework-absolute-lowcore-accessors.patch
