linux-kernel - [PATCH] show right output for cpuinfo

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Date:	Thu,  1 Nov 2007 06:56:00 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, glommer@...il.com, tglx@...utronix.de,
	mingo@...e.hu, Glauber de Oliveira Costa <gcosta@...hat.com>
Subject: [PATCH] show right output for cpuinfo

in x86_64 smp systems, a regression was introduced a few days after 2.6.23,
on its way to 2.6.23. Bisection leads me to commit
92cb7612aee39642d109b8d935ad265e602c0563.

The problem is that the output of 'cat /proc/cpuinfo' shows 0 as the id of
all cpus of a smp system. As far as I know, this only happens on x86_64
systems.

This problem was first noticed by Ravikiran. A simple patch follows

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
Cc: Ravikiran Thirumalai <kiran@...lemp.com>
---
 arch/x86/kernel/setup_64.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 0f0d9d4..eb41c99 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -858,7 +858,6 @@ void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 
 #ifdef CONFIG_SMP
 	c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
-	c->cpu_index = 0;
 #endif
 }
 
-- 
1.4.4.2

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