From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 27 May 2010 17:32:08 +0000 (-0700)
Subject: Avoid warning when CPU hotplug isn't enabled
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=00b9b0af5887fed54e899e3b7f5c2ccf5e739def;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Avoid warning when CPU hotplug isn't enabled

Commit e9fb7631ebcd ("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>
---

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 63e8de13c948..3097382eb44a 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -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)