+Y_LOFF_T yaffs_freespace_reldev(struct yaffs_dev *dev);
+Y_LOFF_T yaffs_totalspace_reldev(struct yaffs_dev *dev);
+
+int yaffs_sync_reldev(struct yaffs_dev *dev);
+int yaffs_unmount_reldev(struct yaffs_dev *dev);
+int yaffs_unmount2_reldev(struct yaffs_dev *dev, int force);
+int yaffs_remount_reldev(struct yaffs_dev *dev, int force, int read_only);
+