linux-kernel - [PATCH 08/12] x86: Don't assume boot cpu is #0

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Date:	Mon, 26 Jan 2009 01:15:28 -0500
From:	Brian Gerst <brgerst@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 08/12] x86: Don't assume boot cpu is #0

Impact: minor cleanup

Signed-off-by: Brian Gerst <brgerst@...il.com>
---
 arch/x86/kernel/setup_percpu.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 36c2e81..be77f1a 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -15,6 +15,7 @@
 #include <asm/highmem.h>
 #include <asm/proto.h>
 #include <asm/cpumask.h>
+#include <asm/cpu.h>
 
 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
 # define DBG(x...) printk(KERN_DEBUG x)
@@ -37,7 +38,7 @@ EXPORT_PER_CPU_SYMBOL(this_cpu_off);
 #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
 
 unsigned long __per_cpu_offset[NR_CPUS] __read_mostly = {
-	[0] = BOOT_PERCPU_OFFSET,
+	[0 ... NR_CPUS-1] = BOOT_PERCPU_OFFSET,
 };
 EXPORT_SYMBOL(__per_cpu_offset);
 
@@ -101,10 +102,10 @@ void __init setup_per_cpu_areas(void)
 				early_per_cpu_map(x86_cpu_to_node_map, cpu);
 #endif
 		/*
-		 * Up to this point, CPU0 has been using .data.init
-		 * area.  Reload %gs offset for CPU0.
+		 * Up to this point, the boot CPU has been using .data.init
+		 * area.  Reload %gs offset for the boot CPU.
 		 */
-		if (cpu == 0)
+		if (cpu == boot_cpu_id)
 			load_gs_base(cpu);
 #endif
 
-- 
1.6.1

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