linux-kernel - [PATCH] x86/process: define cpu_tss_rw in same section as declaration

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Date:   Wed,  3 Jan 2018 12:39:52 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     tj@...nel.org, cl@...ux.com, mingo@...hat.com, hpa@...or.com,
        bp@...e.de, luto@...nel.org, kirill.shutemov@...ux.intel.com,
        thgarnie@...gle.com, jpoimboe@...hat.com, minipli@...glemail.com,
        me@...ehuey.com, namit@...are.com, tklauser@...tanz.ch,
        thomas.lendacky@....com, linux-kernel@...r.kernel.org,
        x86@...nel.org, Nick Desaulniers <ndesaulniers@...gle.com>,
        Borislav Petkov <bpetkov@...e.de>
Subject: [PATCH] x86/process: define cpu_tss_rw in same section as declaration

cpu_tss_rw was declared with the macro

DECLARE_PER_CPU_PAGE_ALIGNED

but then defined with the macro

DEFINE_PER_CPU_SHARED_ALIGNED

leading to section mismatch warnings. Prefer the macro

DEFINE_PER_CPU_PAGE_ALIGNED

Suggested-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
---
 arch/x86/kernel/process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index aed9d94bd46f..832a6acd730f 100644
--- 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
-- 
2.16.0.rc0.223.g4a4ac83678-goog