[PATCH] for_each_possible_cpu: x86_64

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>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-x86_64/percpu.h

@@ -26,7 +26,7 @@
 #define percpu_modcopy(pcpudst, src, size)			\
 do {								\
 	unsigned int __i;					\
-	for_each_cpu(__i)					\
+	for_each_possible_cpu(__i)				\
 		memcpy((pcpudst)+__per_cpu_offset(__i),		\
 		       (src), (size));				\
 } while (0)