Index: uspace/srv/fs/exfat/exfat_fat.c
===================================================================
--- uspace/srv/fs/exfat/exfat_fat.c	(revision 4c3c4a59feab5e527616518e61e77606aae07ba6)
+++ uspace/srv/fs/exfat/exfat_fat.c	(revision 4c3c4a59feab5e527616518e61e77606aae07ba6)
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2008 Jakub Jermar
+ * Copyright (c) 2011 Oleg Romanenko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup fs
+ * @{
+ */
+
+/**
+ * @file	exfat_fat.c
+ * @brief	Functions that manipulate the File Allocation Tables.
+ */
+
+#include "exfat_fat.h"
+#include "exfat.h"
+#include "../../vfs/vfs.h"
+#include <libfs.h>
+#include <libblock.h>
+#include <errno.h>
+#include <byteorder.h>
+#include <align.h>
+#include <assert.h>
+#include <fibril_synch.h>
+#include <malloc.h>
+#include <mem.h>
+
+
+/**
+ * The fat_alloc_lock mutex protects all copies of the File Allocation Table
+ * during allocation of clusters. The lock does not have to be held durring
+ * deallocation of clusters.
+ */
+static FIBRIL_MUTEX_INITIALIZE(fat_alloc_lock);
+
+
+
+/** Perform basic sanity checks on the file system.
+ *
+ * Verify if values of boot sector fields are sane. Also verify media
+ * descriptor. This is used to rule out cases when a device obviously
+ * does not contain a exfat file system.
+ */
+int exfat_sanity_check(exfat_bs_t *bs, devmap_handle_t devmap_handle)
+{
+	return EOK;
+}
+
+/**
+ * @}
+ */