ext2_find_entry
de = ext2_find_entry(dir, child, &folio);
struct ext2_dir_entry_2 *ext2_find_entry(struct inode *, const struct qstr *,
de = ext2_find_entry(dir, &dentry->d_name, &folio);
old_de = ext2_find_entry(old_dir, &old_dentry->d_name, &old_folio);
new_de = ext2_find_entry(new_dir, &new_dentry->d_name,