exfat_bytes_to_dentries
unsigned int dentries_per_page = exfat_bytes_to_dentries(PAGE_SIZE);
unsigned int dentry = exfat_bytes_to_dentries(*cpos) & 0xFFFFFFFF;
exfat_bytes_to_dentries(exfat_block_to_bytes(es->sb, es->num_bh) - es->start_off);
int total_entries = exfat_bytes_to_dentries(i_size_read(&ei->vfs_inode));
if (exfat_bytes_to_dentries(i_size_read(inode)) >= MAX_EXFAT_DENTRIES) {