long written;
	decompress_fn decompress;
	const char *compress_name;
	static __initdata char msg_buf[64];

	header_buf = kmalloc(110, GFP_KERNEL);
	symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL);
	name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);

	if (!header_buf || !symlink_buf || !name_buf)
		panic("can't allocate buffers");

	state = Start;
	this_header = 0;
	message = NULL;
	while (!message && len) {
		loff_t saved_offset = this_header;
		if (*buf == '0' && !(this_header & 3)) {
			state = Start;
			written = write_buffer(buf, len);
			buf += written;
			len -= written;
			continue;
		}
		if (!*buf) {
			buf++;
			len--;
			this_header++;
			continue;
		}
		this_header = 0;
		decompress = decompress_method(buf, len, &compress_name);
		pr_debug("Detected %s compressed data\n", compress_name);
		if (decompress) {
			int res = decompress(buf, len, NULL, flush_buffer, NULL,
				   &my_inptr, error);
			if (res)
				error("decompressor failed");
		} else if (compress_name) {
			if (!message) {
				snprintf(msg_buf, sizeof msg_buf,
					 "compression method %s not configured",
					 compress_name);
				message = msg_buf;
			}
		} else
			error("junk in compressed archive");
		if (state != Reset)
			error("junk in compressed archive");
		this_header = saved_offset + my_inptr;
		buf += my_inptr;
		len -= my_inptr;
	}
	dir_utime();
	kfree(name_buf);
	kfree(symlink_buf);
	kfree(header_buf);
	return message;
}