linux-kernel - [tip:x86/urgent] x86, UV: Fix APICID shift for Westmere processors

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Message-ID: <tip-990a32d1e54b3c0f7304bec95fb883404589b3f0@git.kernel.org>
Date:	Tue, 11 Jan 2011 12:28:13 GMT
From:	tip-bot for Jack Steiner <steiner@....com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	steiner@....com, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/urgent] x86, UV: Fix APICID shift for Westmere processors

Commit-ID:  990a32d1e54b3c0f7304bec95fb883404589b3f0
Gitweb:     http://git.kernel.org/tip/990a32d1e54b3c0f7304bec95fb883404589b3f0
Author:     Jack Steiner <steiner@....com>
AuthorDate: Mon, 10 Jan 2011 13:52:11 -0600
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 11 Jan 2011 12:44:45 +0100

x86, UV: Fix APICID shift for Westmere processors

Westmere processors use a different algorithm for
assigning APICIDs on SGI UV systems. The location of the
node number within the apicid is now a function of the
processor type.

Signed-off-by: Jack Steiner <steiner@....com>
LKML-Reference: <20110110195210.GA18737@....com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/kernel/apic/x2apic_uv_x.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 2a3f2a7..f4f9e95 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -378,7 +378,7 @@ struct apic __refdata apic_x2apic_uv_x = {
 
 static __cpuinit void set_x2apic_extra_bits(int pnode)
 {
-	__get_cpu_var(x2apic_extra_bits) = (pnode << 6);
+	__get_cpu_var(x2apic_extra_bits) = (pnode << uvh_apicid.s.pnode_shift);
 }
 
 /*
--
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