From: Yasunori Goto <y-goto@jp.fujitsu.com>

Refresh NODE_DATA() for generic archs.  In this case, NODE_DATA(nid) ==
node_data[nid].  node_data[] is array of address of pgdat.  So, refresh is
quite simple.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 arch/ia64/Kconfig              |    4 ++++
 include/linux/memory_hotplug.h |   12 ++++++++++++
 2 files changed, 16 insertions(+)

diff -puN arch/ia64/Kconfig~pgdat-allocation-for-new-node-add-refresh-node_data arch/ia64/Kconfig
--- 25/arch/ia64/Kconfig~pgdat-allocation-for-new-node-add-refresh-node_data	Fri May 26 15:55:04 2006
+++ 25-akpm/arch/ia64/Kconfig	Fri May 26 15:55:04 2006
@@ -375,6 +375,10 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
 	def_bool y
 	depends on NEED_MULTIPLE_NODES
 
+config HAVE_ARCH_NODEDATA_EXTENSION
+	def_bool y
+	depends on NUMA
+
 config IA32_SUPPORT
 	bool "Support for Linux/x86 binaries"
 	help
diff -puN include/linux/memory_hotplug.h~pgdat-allocation-for-new-node-add-refresh-node_data include/linux/memory_hotplug.h
--- 25/include/linux/memory_hotplug.h~pgdat-allocation-for-new-node-add-refresh-node_data	Fri May 26 15:55:04 2006
+++ 25-akpm/include/linux/memory_hotplug.h	Fri May 26 15:55:09 2006
@@ -91,6 +91,9 @@ static inline pg_data_t *arch_alloc_node
 static inline void arch_free_nodedata(pg_data_t *pgdat)
 {
 }
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+}
 
 #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
 
@@ -114,6 +117,12 @@ static inline void arch_free_nodedata(pg
  */
 #define generic_free_nodedata(pgdat)	kfree(pgdat)
 
+extern pg_data_t *node_data[];
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+	node_data[nid] = pgdat;
+}
+
 #else /* !CONFIG_NUMA */
 
 /* never called */
@@ -125,6 +134,9 @@ static inline pg_data_t *generic_alloc_n
 static inline void generic_free_nodedata(pg_data_t *pgdat)
 {
 }
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+}
 #endif /* CONFIG_NUMA */
 #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
 
_