From: Andi Kleen <ak@suse.de>
Date: Mon, 12 Sep 2005 16:49:24 +0000 (+0200)
Subject: [PATCH] x86-64: Only allocate per cpu data for possible CPUs, not compiled in CPUs.
X-Git-Tag: v2.6.14-rc1~52
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=e99b861a3e9ec93a48b985519e09b2515c201e8d;hp=2b4a08150e0ce2f6eb5d0987fdfe3524ec799313;ds=sidebyside

[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 e8b54dccb3ee..bd33be24a386 100644
--- 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))) {