jfs_lookup(): don't bother with . or ..

	ino_t inum;

	struct inode *ip;

	struct component_name key;

	const char *name = dentry->d_name.name;

	int len = dentry->d_name.len;

	int rc;

	jfs_info("jfs_lookup: name = %s", name);

	jfs_info("jfs_lookup: name = %s", dentry->d_name.name);

	if ((name[0] == '.') && (len == 1))

		inum = dip->i_ino;

	else if (strcmp(name, "..") == 0)

		inum = PARENT(dip);

	else {

	if ((rc = get_UCSname(&key, dentry)))

		return ERR_PTR(rc);

	rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);

	free_UCSname(&key);

	if (rc == -ENOENT) {

			d_add(dentry, NULL);

			return NULL;

		ip = NULL;

	} else if (rc) {

		jfs_err("jfs_lookup: dtSearch returned %d", rc);

			return ERR_PTR(rc);

		}

	}

		ip = ERR_PTR(rc);

	} else {

		ip = jfs_iget(dip->i_sb, inum);

		if (IS_ERR(ip))

			jfs_err("jfs_lookup: iget failed on inum %d", (uint)inum);

	}

	return d_splice_alias(ip, dentry);

}