linux-kernel - [Patch1/2] fix wrong proc cpuinfo on x64

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Message-Id: <1194333939.3046.36.camel@linux-znh>
Date:	06 Nov 2007 15:25:39 +0800
From:	Zou Nan hai <nanhai.zou@...el.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>
Subject: [Patch1/2] fix wrong proc cpuinfo on x64


in 2.6.24-rc1 kernel, 
The /proc/cpuinfo display is wrong.

One issue is every processor id appears to be 0.

That is because smp_store_cpu_info will set cpuinfo_x86->cpu_index
to cpu id then call identify_cpu
identify_cpu will call early_identify_cpu which set c->cpu_index back to
0.

This patch set cpu_index after identify_cpu to fix the issue.

Signed-off-by: Zou Nan hai <nanhai.zou@...el.com>

--- linux-2.6.24-rc1/arch/x86/kernel/smpboot_64.c	2007-10-29 22:03:05.000000000 -0400
+++ b/arch/x86/kernel/smpboot_64.c	2007-11-05 22:12:57.000000000 -0500
@@ -141,8 +141,8 @@ static void __cpuinit smp_store_cpu_info
 	struct cpuinfo_x86 *c = &cpu_data(id);
 
 	*c = boot_cpu_data;
-	c->cpu_index = id;
 	identify_cpu(c);
+	c->cpu_index = id;
 	print_cpu_info(c);
 }
 

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