[PATCH] x86-64: Only allocate per cpu data for possible CPUs, not compiled in CPUs.

Saves some memory except for hotplug situations.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c
index e8b54dc..bd33be2 100644 (file)
--- a/arch/x86_64/kernel/setup64.c
+++ b/arch/x86_64/kernel/setup64.c
@@ -94,7 +94,7 @@ void __init setup_per_cpu_areas(void)
                size = PERCPU_ENOUGH_ROOM;
 #endif
 
-       for (i = 0; i < NR_CPUS; i++) { 
+       for_each_cpu_mask (i, cpu_possible_map) {
                char *ptr;
 
                if (!NODE_DATA(cpu_to_node(i))) {