linux-kernel - Re: [PATCH] x86: fix missing cpu

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Date:	Fri, 31 Oct 2008 00:45:29 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86: fix missing cpu_index initialisation


* Ingo Molnar <mingo@...e.hu> wrote:

> > Depends on [VOYAGER] x86: add ability to test for boot CPU
> 
> applied both to tip/x86/urgent:
> 
>  6b5496e: x86/voyager: fix missing cpu_index initialisation
>  3b25aec: x86/voyager: fix compile breakage caused by dc1e35c6e95e8923cf1d35104

this broke the x86 build:

 arch/x86/kernel/cpu/common.c: In function 'early_identify_cpu':
 arch/x86/kernel/cpu/common.c:553: error: 'struct cpuinfo_x86' has no member named 'cpu_index'

fixed via the patch below.

	Ingo

---------->
>From 1c4acdb467f8a6704855a5670ff3d82e3c18eb0b Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@...e.hu>
Date: Fri, 31 Oct 2008 00:43:03 +0100
Subject: [PATCH] x86: cpu_index build fix

fix:

 arch/x86/kernel/cpu/common.c: In function 'early_identify_cpu':
 arch/x86/kernel/cpu/common.c:553: error: 'struct cpuinfo_x86' has no member named 'cpu_index'

as cpu_index is only available on SMP.

Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/cpu/common.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index da8f15a..003a653 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -550,7 +550,9 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
 
 	validate_pat_support(c);
 
+#ifdef CONFIG_SMP
 	c->cpu_index = boot_cpu_id;
+#endif
 }
 
 void __init early_cpu_init(void)
--
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