xdr_decode_array2
err = xdr_decode_array2(buf, base + 4, &nfsacl_desc.desc);
if (xdr_decode_array2(xdr->buf, base, &nfsacl_desc.desc))
extern int xdr_decode_array2(const struct xdr_buf *buf, unsigned int base,
EXPORT_SYMBOL_GPL(xdr_decode_array2);