int yramdisk_initialise(yaffs_dev_t *dev);
int yramdisk_mark_block_bad(yaffs_dev_t *dev,int blockNumber);
int yramdisk_query_block(yaffs_dev_t *dev, int block_no, yaffs_block_state_t *state, int *seq_number);
int yramdisk_initialise(yaffs_dev_t *dev);
int yramdisk_mark_block_bad(yaffs_dev_t *dev,int blockNumber);
int yramdisk_query_block(yaffs_dev_t *dev, int block_no, yaffs_block_state_t *state, int *seq_number);