exfat_free_cluster
exfat_free_cluster(inode, &dir);
int exfat_free_cluster(struct inode *inode, struct exfat_chain *p_chain);
if (exfat_free_cluster(inode, &clu))
exfat_free_cluster(inode, &clu);
if (exfat_free_cluster(new_inode, &new_clu_to_free)) {