linux-kernel - [tip:x86/pti] x86/pti: Mark constant arrays as _

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Date:   Fri, 2 Feb 2018 14:18:51 -0800
From:   tip-bot for Arnd Bergmann <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dwmw@...zon.co.uk, thgarnie@...gle.com, hpa@...or.com,
        linux-kernel@...r.kernel.org,
        ricardo.neri-calderon@...ux.intel.com, tglx@...utronix.de,
        mingo@...nel.org, luto@...nel.org, arnd@...db.de, bp@...e.de
Subject: [tip:x86/pti] x86/pti: Mark constant arrays as __initconst

Commit-ID:  4bf5d56d429cbc96c23d809a08f63cd29e1a702e
Gitweb:     https://git.kernel.org/tip/4bf5d56d429cbc96c23d809a08f63cd29e1a702e
Author:     Arnd Bergmann <arnd@...db.de>
AuthorDate: Fri, 2 Feb 2018 22:39:23 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 2 Feb 2018 23:13:56 +0100

x86/pti: Mark constant arrays as __initconst

I'm seeing build failures from the two newly introduced arrays that
are marked 'const' and '__initdata', which are mutually exclusive:

arch/x86/kernel/cpu/common.c:882:43: error: 'cpu_no_speculation' causes a section type conflict with 'e820_table_firmware_init'
arch/x86/kernel/cpu/common.c:895:43: error: 'cpu_no_meltdown' causes a section type conflict with 'e820_table_firmware_init'

The correct annotation is __initconst.

Fixes: fec9434a12f3 ("x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...e.de>
Cc: Thomas Garnier <thgarnie@...gle.com>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Link: https://lkml.kernel.org/r/20180202213959.611210-1-arnd@arndb.de

---
 arch/x86/kernel/cpu/common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index dd09270..d63f4b57 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -900,7 +900,7 @@ static void identify_cpu_without_cpuid(struct cpuinfo_x86 *c)
 #endif
 }
 
-static const __initdata struct x86_cpu_id cpu_no_speculation[] = {
+static const __initconst struct x86_cpu_id cpu_no_speculation[] = {
 	{ X86_VENDOR_INTEL,	6, INTEL_FAM6_ATOM_CEDARVIEW,	X86_FEATURE_ANY },
 	{ X86_VENDOR_INTEL,	6, INTEL_FAM6_ATOM_CLOVERVIEW,	X86_FEATURE_ANY },
 	{ X86_VENDOR_INTEL,	6, INTEL_FAM6_ATOM_LINCROFT,	X86_FEATURE_ANY },
@@ -913,7 +913,7 @@ static const __initdata struct x86_cpu_id cpu_no_speculation[] = {
 	{}
 };
 
-static const __initdata struct x86_cpu_id cpu_no_meltdown[] = {
+static const __initconst struct x86_cpu_id cpu_no_meltdown[] = {
 	{ X86_VENDOR_AMD },
 	{}
 };