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diff --git a/target/linux/ar7/files/include/asm-mips/ar7/mmzone.h b/target/linux/ar7/files/include/asm-mips/ar7/mmzone.h
new file mode 100644
index 000000000..885fdb0cb
--- /dev/null
+++ b/target/linux/ar7/files/include/asm-mips/ar7/mmzone.h
@@ -0,0 +1,29 @@
+/*
+ * $Id$
+ * 
+ * Copyright (C) 2007 OpenWrt.org
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _ASM_MACH_MMZONE_H
+#define _ASM_MACH_MMZONE_H
+
+extern pg_data_t __node_data[];
+#define NODE_DATA(nid)          (&__node_data[nid])
+#define NODE_MEM_MAP(nid)       (NODE_DATA(nid)->node_mem_map)
+#define pa_to_nid(addr) (((addr) >= ARCH_PFN_OFFSET << PAGE_SHIFT) ? 0 : -1)
+
+#endif /* _ASM_MACH_MMZONE_H */