[PATCH] cpu_down() warning fix

Fix (harmless?) smp_processor_id() usage in preemptible section of
cpu_down.
Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/cpu.c

@@ -132,7 +132,8 @@ int cpu_down(unsigned int cpu)
 	__cpu_die(cpu);
 
 	/* Move it here so it can run. */
-	kthread_bind(p, smp_processor_id());
+	kthread_bind(p, get_cpu());
+	put_cpu();
 
 	/* CPU is completely dead: tell everyone.  Too late to complain. */
 	if (notifier_call_chain(&cpu_chain, CPU_DEAD, (void *)(long)cpu)