This is a note to let you know that I've just added the patch titled
s390/entry: align system call table on 8 bytes
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:
s390-entry-align-system-call-table-on-8-bytes.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 378ca2d2ad410a1cd5690d06b46c5e2297f4c8c0 Mon Sep 17 00:00:00 2001
From: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
Date: Tue, 26 Mar 2024 18:12:13 +0100
Subject: s390/entry: align system call table on 8 bytes
From: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
commit 378ca2d2ad410a1cd5690d06b46c5e2297f4c8c0 upstream.
Align system call table on 8 bytes. With sys_call_table entry size
of 8 bytes that eliminates the possibility of a system call pointer
crossing cache line boundary.
Cc: stable@xxxxxxxxxx
Suggested-by: Ulrich Weigand <ulrich.weigand@xxxxxxxxxx>
Reviewed-by: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Signed-off-by: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/entry.S | 1 +
1 file changed, 1 insertion(+)
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -685,6 +685,7 @@ ENDPROC(stack_overflow)
.Lthis_cpu: .short 0
.Lstosm_tmp: .byte 0
.section .rodata, "a"
+ .balign 8
#define SYSCALL(esame,emu) .quad __s390x_ ## esame
.globl sys_call_table
sys_call_table:
Patches currently in stable-queue which might be from sumanthk@xxxxxxxxxxxxx are
queue-5.15/s390-entry-align-system-call-table-on-8-bytes.patch
