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Avoid warning when CPU hotplug isn't enabled 

Commit e9fb7631eb ("cpu-hotplug: introduce cpu_notify(),
__cpu_notify(), cpu_notify_nofail()") also introduced this annoying
warning:

  kernel/cpu.c:157: warning: 'cpu_notify_nofail' defined but not used

when CONFIG_HOTPLUG_CPU wasn't set.

So move that helper inside the #ifdef CONFIG_HOTPLUG_CPU region, and
simplify it while at it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2010-05-27 10:32:08 -07:00
parent e2e2400bd4
commit 00b9b0af58
1 changed files with 3 additions and 6 deletions
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9
kernel/cpu.c
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@ -154,16 +154,13 @@ static int cpu_notify(unsigned long val, void *v)
return __cpu_notify(val, v, -1, NULL);
}
#ifdef CONFIG_HOTPLUG_CPU
static void cpu_notify_nofail(unsigned long val, void *v)
{
int err;
err = cpu_notify(val, v);
BUG_ON(err);
BUG_ON(cpu_notify(val, v));
}
#ifdef CONFIG_HOTPLUG_CPU
EXPORT_SYMBOL(register_cpu_notifier);
void __ref unregister_cpu_notifier(struct notifier_block *nb)