int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no);
int nandmtd1_query_block(struct yaffs_dev *dev, int block_no,
int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no);
int nandmtd1_query_block(struct yaffs_dev *dev, int block_no,