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Date: Mon, 25 Jul 2005 20:27:37 -0700
From: Andrew Morton <akpm@osdl.org>
To: linux-kernel@vger.kernel.org
Subject: Fw: [PATCH] x86_64: fix SMP boot lockup on some machines
Message-Id: <20050725202737.4e6bd029.akpm@osdl.org>
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People who are experiencing early-boot lockups on x86_64
might find this useful..


Don't compare linux processor index with APICID

Fixes boot up lockups on some machines where CPU apic ids
don't start with 0

Signed-off-by: Andi Kleen <ak@suse.de>

Index: linux/arch/x86_64/kernel/smpboot.c
===================================================================
--- linux.orig/arch/x86_64/kernel/smpboot.c
+++ linux/arch/x86_64/kernel/smpboot.c
@@ -211,7 +211,7 @@ static __cpuinit void sync_master(void *
 {
 	unsigned long flags, i;
 
-	if (smp_processor_id() != boot_cpu_id)
+	if (smp_processor_id() != 0)
 		return;
 
 	go[MASTER] = 0;