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diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h
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+/*
+ * (C) Copyright 2011 - 2012 Samsung Electronics
+ * EXT4 filesystem implementation in Uboot by
+ * Uma Shankar <uma.shankar@samsung.com>
+ * Manjunatha C Achar <a.manjunatha@samsung.com>
+ *
+ * ext4ls and ext4load : based on ext2 ls load support in Uboot.
+ *
+ * (C) Copyright 2004
+ * esd gmbh <www.esd-electronics.com>
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * based on code from grub2 fs/ext2.c and fs/fshelp.c by
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ *
+ * ext4write : Based on generic ext4 protocol.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __EXT4_COMMON__
+#define __EXT4_COMMON__
+#include <malloc.h>
+#include <errno.h>
+#include <dma.h>
+#include "ext4fs.h"
+#include "ext_common.h"
+
+static inline void *zalloc(size_t size)
+{
+ void *p = dma_alloc(size);
+
+ if (p)
+ memset(p, 0, size);
+
+ return p;
+}
+
+int ext4fs_read_inode(struct ext2_data *data, int ino,
+ struct ext2_inode *inode);
+int ext4fs_read_file(struct ext2fs_node *node, int pos,
+ unsigned int len, char *buf);
+int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
+ struct ext2fs_node **foundnode, int *foundtype);
+int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
+ struct ext2fs_node **fnode, int *ftype);
+
+#endif