Index: linux-2.6.20.3/fs/filesystems.c
===================================================================
--- linux-2.6.20.3.orig/fs/filesystems.c	2007-08-15 20:12:11.000000000 +0200
+++ linux-2.6.20.3/fs/filesystems.c	2007-08-15 20:12:26.000000000 +0200
@@ -29,7 +29,9 @@
  */
 
 static struct file_system_type *file_systems;
-static DEFINE_RWLOCK(file_systems_lock);
+DEFINE_RWLOCK(file_systems_lock);
+
+EXPORT_SYMBOL(file_systems_lock);
 
 /* WARNING: This can be used only if we _already_ own a reference */
 void get_filesystem(struct file_system_type *fs)
Index: linux-2.6.20.3/include/linux/fs.h
===================================================================
--- linux-2.6.20.3.orig/include/linux/fs.h	2007-08-15 20:12:12.000000000 +0200
+++ linux-2.6.20.3/include/linux/fs.h	2007-08-15 20:15:06.000000000 +0200
@@ -1813,6 +1813,7 @@
 
 extern const struct file_operations generic_ro_fops;
 
+extern rwlock_t file_systems_lock;
 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
 
 extern int vfs_readlink(struct dentry *, char __user *, int, const char *);
Index: linux-2.6.20.3/fs/namespace.c
===================================================================
--- linux-2.6.20.3.orig/fs/namespace.c	2007-08-15 20:12:12.000000000 +0200
+++ linux-2.6.20.3/fs/namespace.c	2007-08-15 20:12:26.000000000 +0200
@@ -1627,6 +1627,7 @@
 		mntput(old_pwdmnt);
 	}
 }
+EXPORT_SYMBOL(set_fs_pwd);
 
 static void chroot_fs_refs(struct nameidata *old_nd, struct nameidata *new_nd)
 {
Index: linux-2.6.20.3/fs/dcache.c
===================================================================
--- linux-2.6.20.3.orig/fs/dcache.c	2007-08-15 20:12:11.000000000 +0200
+++ linux-2.6.20.3/fs/dcache.c	2007-08-15 20:16:42.000000000 +0200
@@ -1508,7 +1508,7 @@
  * Update the dcache to reflect the move of a file name. Negative
  * dcache entries should not be moved in this way.
  */
-static void d_move_locked(struct dentry * dentry, struct dentry * target)
+void d_move_locked(struct dentry * dentry, struct dentry * target)
 {
 	struct hlist_head *list;
 
@@ -1567,6 +1567,8 @@
 	write_sequnlock(&rename_lock);
 }
 
+EXPORT_SYMBOL(d_move_locked);
+
 /**
  * d_move - move a dentry
  * @dentry: entry to move
@@ -1966,6 +1968,7 @@
 
 	return result;
 }
+EXPORT_SYMBOL(is_subdir);
 
 void d_genocide(struct dentry *root)
 {