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 c25f23e..8caa0b7 100644 (file)
--- 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 9d914e1..b1bc7b1 100644 (file)
--- 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);