linux-kernel - [tip:x86/cpu] x86: Use hard_smp_processor

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Date:	Fri, 4 Sep 2009 07:59:22 GMT
From:	tip-bot for Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	gorcunov@...nvz.org, yinghai@...nel.org, andreas.herrmann3@....com,
	suresh.b.siddha@...el.com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/cpu] x86: Use hard_smp_processor_id() to get apic id for AMD K8 cpus

Commit-ID:  0d96b9ff748b5f57d6f1d6d21209f5745245aadc
Gitweb:     http://git.kernel.org/tip/0d96b9ff748b5f57d6f1d6d21209f5745245aadc
Author:     Yinghai Lu <yinghai@...nel.org>
AuthorDate: Sat, 29 Aug 2009 13:17:14 -0700
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 4 Sep 2009 09:55:29 +0200

x86: Use hard_smp_processor_id() to get apic id for AMD K8 cpus

Otherwise, system with apci id lifting will have wrong apicid in
/proc/cpuinfo.

and use that in srat_detect_node().

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Andreas Herrmann <andreas.herrmann3@....com>
Cc: Suresh Siddha <suresh.b.siddha@...el.com>
Cc: Cyrill Gorcunov <gorcunov@...nvz.org>
LKML-Reference: <4A998CCA.1040407@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/cpu/amd.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index a76d2c1..e1600c7 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -336,7 +336,7 @@ static void __cpuinit srat_detect_node(struct cpuinfo_x86 *c)
 #if defined(CONFIG_NUMA) && defined(CONFIG_X86_64)
 	int cpu = smp_processor_id();
 	int node;
-	unsigned apicid = cpu_has_apic ? hard_smp_processor_id() : c->apicid;
+	unsigned apicid = c->apicid;
 
 	node = per_cpu(cpu_llc_id, cpu);
 
@@ -481,6 +481,9 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	}
 	if (c->x86 == 0x10 || c->x86 == 0x11)
 		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+
+	/* get apicid instead of initial apic id from cpuid */
+	c->apicid = hard_smp_processor_id();
 #else
 
 	/*
--
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