linux-kernel - Re: [patch 2/2] x2apic: use x2apic id reported by cpuid during topology discovery

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Message-ID: <20080827070427.GH6255@elte.hu>
Date:	Wed, 27 Aug 2008 09:04:27 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	hpa@...or.com, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	yhlu.kernel@...il.com
Subject: Re: [patch 2/2] x2apic: use x2apic id reported by cpuid during
	topology discovery


applied the delta patch below to tip/x86/x2apic - thanks Suresh.

	Ingo

>From 11c231a962c740b3216eb6565149ae5a7944cba7 Mon Sep 17 00:00:00 2001
From: Suresh Siddha <suresh.b.siddha@...el.com>
Date: Sat, 23 Aug 2008 17:47:11 +0200
Subject: [PATCH] x86: use x2apic id reported by cpuid during topology discovery, fix

v2: Fix for !SMP build

Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/cpu/addon_cpuid_features.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index aa9641a..a2d1a54 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -69,6 +69,7 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
  */
 void __cpuinit detect_extended_topology(struct cpuinfo_x86 *c)
 {
+#ifdef CONFIG_SMP
 	unsigned int eax, ebx, ecx, edx, sub_index;
 	unsigned int ht_mask_width, core_plus_mask_width;
 	unsigned int core_select_mask, core_level_siblings;
@@ -132,6 +133,7 @@ void __cpuinit detect_extended_topology(struct cpuinfo_x86 *c)
 		printk(KERN_INFO  "CPU: Processor Core ID: %d\n",
 		       c->cpu_core_id);
 	return;
+#endif
 }
 
 #ifdef CONFIG_X86_PAT
--
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