[PATCH 3/4] Memory Add Fixes for ppc64

[Mike Kravetz <kravetz@us.ibm.com>]

This is a temporary kludge that supports adding all new memory to
node 0.  I will provide a more complete solution similar to that
used for dynamically added CPUs in a few days.

Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>

diff -Naupr linux-2.6.14-git7/include/asm-ppc64/mmzone.h linux-2.6.14-git7.work/include/asm-ppc64/mmzone.h
--- linux-2.6.14-git7/include/asm-ppc64/mmzone.h	2005-11-04 21:21:09.000000000 +0000
+++ linux-2.6.14-git7.work/include/asm-ppc64/mmzone.h	2005-11-04 22:10:44.000000000 +0000
@@ -33,6 +33,9 @@ extern int numa_cpu_lookup_table[];
 extern char *numa_memory_lookup_table;
 extern cpumask_t numa_cpumask_lookup_table[];
 extern int nr_cpus_in_node[];
+#ifdef CONFIG_MEMORY_HOTPLUG
+extern unsigned long max_pfn;
+#endif
 
 /* 16MB regions */
 #define MEMORY_INCREMENT_SHIFT 24
@@ -45,6 +48,11 @@ static inline int pa_to_nid(unsigned lon
 {
 	int nid;
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+	/* kludge hot added sections default to node 0 */
+	if (pa >= (max_pfn << PAGE_SHIFT))
+		return 0;
+#endif
 	nid = numa_memory_lookup_table[pa >> MEMORY_INCREMENT_SHIFT];
 
 #ifdef DEBUG_NUMA