commit 69d81fcde7797342417591ba7affb372b9c86eae
author Andi Kleen <ak@suse.de> Sat Nov 05 17:25:53 2005 +0100
committer Linus Torvalds <torvalds@g5.osdl.org> Mon Nov 14 19:55:14 2005 -0800
tree 97fbc73fd20f8ebc313b2bc41367a8efe36c2c3d
parent 50895c5d76e15d8af480eff1aaab5770cabbc2c2

[PATCH] x86_64: Speed up numa_node_id by putting it directly into the PDA

Not go from the CPU number to an mapping array.
Mode number is often used now in fast paths.

This also adds a generic numa_node_id to all the topology includes

Suggested by Eric Dumazet

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

include/linux/mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 57fc99c..f3cffc3 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -435,7 +435,9 @@
 
 #include <linux/topology.h>
 /* Returns the number of the current Node. */
+#ifndef numa_node_id
 #define numa_node_id()		(cpu_to_node(raw_smp_processor_id()))
+#endif
 
 #ifndef CONFIG_NEED_MULTIPLE_NODES