diff --git a/include/asm-ia64/sn/arch.h b/include/asm-ia64/sn/arch.h
index 7c349f0..e6d9aa6 100644
--- a/include/asm-ia64/sn/arch.h
+++ b/include/asm-ia64/sn/arch.h
@@ -5,7 +5,7 @@
  *
  * SGI specific setup.
  *
- * Copyright (C) 1995-1997,1999,2001-2004 Silicon Graphics, Inc.  All rights reserved.
+ * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc.  All rights reserved.
  * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
  */
 #ifndef _ASM_IA64_SN_ARCH_H
@@ -47,6 +47,15 @@
 #define MAX_COMPACT_NODES	2048
 #define CPUS_PER_NODE		4
 
+
+/*
+ * Compact node ID to nasid mappings kept in the per-cpu data areas of each
+ * cpu.
+ */
+DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_NUMNODES]);
+#define sn_cnodeid_to_nasid	(&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
+
+
 extern void sn_flush_all_caches(long addr, long bytes);
 
 #endif /* _ASM_IA64_SN_ARCH_H */
diff --git a/include/asm-ia64/sn/pda.h b/include/asm-ia64/sn/pda.h
index cd19f17..a5340cf 100644
--- a/include/asm-ia64/sn/pda.h
+++ b/include/asm-ia64/sn/pda.h
@@ -49,7 +49,6 @@
 
 	unsigned long	sn_soft_irr[4];
 	unsigned long	sn_in_service_ivecs[4];
-	short		cnodeid_to_nasid_table[MAX_NUMNODES];
 	int		sn_lb_int_war_ticks;
 	int		sn_last_irq;
 	int		sn_first_irq;
diff --git a/include/asm-ia64/sn/sn_cpuid.h b/include/asm-ia64/sn/sn_cpuid.h
index 685435a..6b44290 100644
--- a/include/asm-ia64/sn/sn_cpuid.h
+++ b/include/asm-ia64/sn/sn_cpuid.h
@@ -4,7 +4,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 
@@ -123,11 +123,8 @@
 
 /*
  * cnodeid_to_nasid - convert a cnodeid to a NASID
- *	Macro relies on pg_data for a node being on the node itself.
- *	Just extract the NASID from the pointer.
- *
  */
-#define cnodeid_to_nasid(cnodeid)	pda->cnodeid_to_nasid_table[cnodeid]
+#define cnodeid_to_nasid(cnodeid)	(sn_cnodeid_to_nasid[cnodeid])
  
 /*
  * nasid_to_cnodeid - convert a NASID to a cnodeid