Patch "x86/process: Define cpu_tss_rw in same section as declaration" has been added to the 4.14-stable tree

Patch "x86/process: Define cpu_tss_rw in same section as declaration" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    x86/process: Define cpu_tss_rw in same section as declaration

to the 4.14-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:
     x86-process-define-cpu_tss_rw-in-same-section-as-declaration.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2fd9c41aea47f4ad071accf94b94f94f2c4d31eb Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers@google.com>
Date: Wed, 3 Jan 2018 12:39:52 -0800
Subject: x86/process: Define cpu_tss_rw in same section as declaration

From: Nick Desaulniers <ndesaulniers@google.com>

commit 2fd9c41aea47f4ad071accf94b94f94f2c4d31eb upstream.

cpu_tss_rw is declared with DECLARE_PER_CPU_PAGE_ALIGNED
but then defined with DEFINE_PER_CPU_SHARED_ALIGNED
leading to section mismatch warnings.

Use DEFINE_PER_CPU_PAGE_ALIGNED consistently. This is necessary because
it's mapped to the cpu entry area and must be page aligned.

[ tglx: Massaged changelog a bit ]

Fixes: 1a935bc3d4ea ("x86/entry: Move SYSENTER_stack to the beginning of struct tss_struct")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: thomas.lendacky@amd.com
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: tklauser@distanz.ch
Cc: minipli@googlemail.com
Cc: me@kylehuey.com
Cc: namit@vmware.com
Cc: luto@kernel.org
Cc: jpoimboe@redhat.com
Cc: tj@kernel.org
Cc: cl@linux.com
Cc: bp@suse.de
Cc: thgarnie@google.com
Cc: kirill.shutemov@linux.intel.com
Link: https://lkml.kernel.org/r/20180103203954.183360-1-ndesaulniers@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kernel/process.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -47,7 +47,7 @@
  * section. Since TSS's are completely CPU-local, we want them
  * on exact cacheline boundaries, to eliminate cacheline ping-pong.
  */
-__visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss_rw) = {
+__visible DEFINE_PER_CPU_PAGE_ALIGNED(struct tss_struct, cpu_tss_rw) = {
 	.x86_tss = {
 		/*
 		 * .sp0 is only used when entering ring 0 from a lower


Patches currently in stable-queue which might be from ndesaulniers@google.com are

queue-4.14/x86-process-define-cpu_tss_rw-in-same-section-as-declaration.patch