linux-kernel - [tip:x86/urgent] x86: Fix 32-bit *_cpu

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Message-ID: <tip-7ae184e4b97158629d657ab5c0eca2ea06d1c5a9@git.kernel.org>
Date:	Wed, 6 Mar 2013 06:31:43 -0800
From:	tip-bot for Krzysztof Mazur <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	krzysiek@...lesie.net, tglx@...utronix.de, bp@...e.de
Subject: [tip:x86/urgent] x86: Fix 32-bit *_cpu_data initializers

Commit-ID:  7ae184e4b97158629d657ab5c0eca2ea06d1c5a9
Gitweb:     http://git.kernel.org/tip/7ae184e4b97158629d657ab5c0eca2ea06d1c5a9
Author:     Krzysztof Mazur <krzysiek@...lesie.net>
AuthorDate: Sun, 3 Mar 2013 00:14:42 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 6 Mar 2013 11:17:09 +0100

x86: Fix 32-bit *_cpu_data initializers

The commit 27be457000211a6903968dfce06d5f73f051a217
('x86 idle: remove 32-bit-only "no-hlt" parameter, hlt_works_ok
flag') removed the hlt_works_ok flag from struct cpuinfo_x86, but
boot_cpu_data and new_cpu_data initializers were not changed
causing setting f00f_bug flag, instead of fdiv_bug.

If CONFIG_X86_F00F_BUG is not set the f00f_bug flag is never
cleared.

To avoid such problems in future C99-style initialization is now
used.

Signed-off-by: Krzysztof Mazur <krzysiek@...lesie.net>
Acked-by: Borislav Petkov <bp@...e.de>
Cc: len.brown@...el.com
Link: http://lkml.kernel.org/r/1362266082-2227-1-git-send-email-krzysiek@podlesie.net
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/setup.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 84d3285..90d8cc9 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -171,9 +171,15 @@ static struct resource bss_resource = {
 
 #ifdef CONFIG_X86_32
 /* cpu data as detected by the assembly code in head.S */
-struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
+struct cpuinfo_x86 new_cpu_data __cpuinitdata = {
+	.wp_works_ok = -1,
+	.fdiv_bug = -1,
+};
 /* common cpu data for all cpus */
-struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
+struct cpuinfo_x86 boot_cpu_data __read_mostly = {
+	.wp_works_ok = -1,
+	.fdiv_bug = -1,
+};
 EXPORT_SYMBOL(boot_cpu_data);
 
 unsigned int def_to_bigsmp;
--
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