From: Adrian Bunk <bunk@stusta.de>
Date: Wed, 17 Oct 2007 16:04:38 +0000 (+0200)
Subject: i386: no need to make enable_cpu_hotplug a variable
X-Git-Tag: v2.6.24-rc1~476^2~65
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a850cef77f148c2e305022a1ed86ca6cff5ee300;p=linux-2.6

i386: no need to make enable_cpu_hotplug a variable

As long as there's no write access to this variable there's no reason to
let gcc check it at runtime.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
index c25f23eb39..8caa0b7774 100644
--- a/arch/x86/kernel/topology.c
+++ b/arch/x86/kernel/topology.c
@@ -44,15 +44,15 @@ int arch_register_cpu(int num)
 	 * Also certain PCI quirks require not to enable hotplug control
 	 * for all CPU's.
 	 */
-	if (num && enable_cpu_hotplug)
+#ifdef CONFIG_HOTPLUG_CPU
+	if (num)
 		cpu_devices[num].cpu.hotpluggable = 1;
+#endif
 
 	return register_cpu(&cpu_devices[num].cpu, num);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-int enable_cpu_hotplug = 1;
-
 void arch_unregister_cpu(int num) {
 	return unregister_cpu(&cpu_devices[num].cpu);
 }
diff --git a/include/asm-x86/cpu.h b/include/asm-x86/cpu.h
index 9d914e1e4a..b1bc7b1b64 100644
--- a/include/asm-x86/cpu.h
+++ b/include/asm-x86/cpu.h
@@ -13,9 +13,6 @@ struct i386_cpu {
 extern int arch_register_cpu(int num);
 #ifdef CONFIG_HOTPLUG_CPU
 extern void arch_unregister_cpu(int);
-extern int enable_cpu_hotplug;
-#else
-#define enable_cpu_hotplug	0
 #endif
 
 DECLARE_PER_CPU(int, cpu_state);