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i386: no need to make enable_cpu_hotplug a variable

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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>
This commit is contained in:
Adrian Bunk 2007-10-17 18:04:38 +02:00 committed by Thomas Gleixner
parent fb7ae26df0
commit a850cef77f
2 changed files with 3 additions and 6 deletions
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6
arch/x86/kernel/topology.c
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@ -44,15 +44,15 @@ int arch_register_cpu(int num)
* Also certain PCI quirks require not to enable hotplug control * Also certain PCI quirks require not to enable hotplug control
* for all CPU's. * for all CPU's.
*/ */
if (num && enable_cpu_hotplug) #ifdef CONFIG_HOTPLUG_CPU
if (num)
cpu_devices[num].cpu.hotpluggable = 1; cpu_devices[num].cpu.hotpluggable = 1;
#endif
return register_cpu(&cpu_devices[num].cpu, num); return register_cpu(&cpu_devices[num].cpu, num);
} }
#ifdef CONFIG_HOTPLUG_CPU #ifdef CONFIG_HOTPLUG_CPU
int enable_cpu_hotplug = 1;
void arch_unregister_cpu(int num) { void arch_unregister_cpu(int num) {
return unregister_cpu(&cpu_devices[num].cpu); return unregister_cpu(&cpu_devices[num].cpu);
} }

3
include/asm-x86/cpu.h
View File

@ -13,9 +13,6 @@ struct i386_cpu {
extern int arch_register_cpu(int num); extern int arch_register_cpu(int num);
#ifdef CONFIG_HOTPLUG_CPU #ifdef CONFIG_HOTPLUG_CPU
extern void arch_unregister_cpu(int); extern void arch_unregister_cpu(int);
extern int enable_cpu_hotplug;
#else
#define enable_cpu_hotplug 0
#endif #endif
DECLARE_PER_CPU(int, cpu_state); DECLARE_PER_CPU(int, cpu_state);