[ARM] for_each_possible_cpu

for_each_cpu() actually iterates across all possible CPUs.  We've had mistakes
in the past where people were using for_each_cpu() where they should have been
iterating across only online or present CPUs.  This is inefficient and
possibly buggy.

We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the
future.

This patch replaces for_each_cpu with for_each_possible_cpu.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/setup.c

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 673cab2..9fc9af8 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -807,7 +807,7 @@
 {
 	int cpu;
 
-	for_each_cpu(cpu)
+	for_each_possible_cpu(cpu)
 		register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL);
 
 	return 0;