From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

This patch is necessary for ia64

drivers/built-in.o(.text+0x6c661): In function `acpi_memory_enable_device':
: undefined reference to `memory_add_physaddr_to_nid'

ia64 has to define memory_add_physaddr_to_nid()

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Keith Mannthey <kmannth@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 arch/ia64/mm/numa.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff -puN arch/ia64/mm/numa.c~hot-add-mem-x86_64-memory_add_physaddr_to_nid-node-fixup-fix arch/ia64/mm/numa.c
--- a/arch/ia64/mm/numa.c~hot-add-mem-x86_64-memory_add_physaddr_to_nid-node-fixup-fix
+++ a/arch/ia64/mm/numa.c
@@ -69,4 +69,20 @@ int early_pfn_to_nid(unsigned long pfn)
 
 	return 0;
 }
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ *  SRAT information is stored in node_memblk[], then we can use SRAT
+ *  information at memory-hot-add if necessary.
+ */
+
+int memory_add_physaddr_to_nid(u64 addr)
+{
+	int nid = paddr_to_nid(addr);
+	if (nid < 0)
+		return 0;
+	return nid;
+}
+
+#endif
 #endif
_