[PATCH 1/2] powerpc: implement pcibus_to_node and pcibus_to_cpumask

[Christoph Hellwig]

On 64bit powerpc we can find out what node a pci bus hangs off, so
implement the topology.h macros that export this information.

For 32bit this seems a little more difficult, but I don't know of 32bit
powerpc NUMA machines either, so let's leave it out for now.


Signed-off-by: Christoph Hellwig <hch at lst.de>

Index: linux-2.6/include/asm-powerpc/topology.h
===================================================================
--- linux-2.6.orig/include/asm-powerpc/topology.h	2006-05-02 16:26:14.000000000 +0200
+++ linux-2.6/include/asm-powerpc/topology.h	2006-05-30 14:42:18.000000000 +0200
@@ -32,8 +32,13 @@
 
 int of_node_to_nid(struct device_node *device);
 
+#ifdef CONFIG_PPC64
+#define pcibus_to_node(bus)	(of_node_to_nid(bus->sysdata))
+#define pcibus_to_cpumask(bus)	(node_to_cpumask(of_node_to_nid(bus->sysdata)))
+#else
 #define pcibus_to_node(node)    (-1)
 #define pcibus_to_cpumask(bus)	(cpu_online_map)
+#endif
 
 /* sched_domains SD_NODE_INIT for PPC64 machines */
 #define SD_NODE_INIT (struct sched_domain) {		\