extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
				     const struct svc_rdma_recv_ctxt *rctxt,
				     const struct xdr_buf *xdr)
extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
				     const struct svc_rdma_recv_ctxt *rctxt,
				     struct svc_rdma_send_ctxt *sctxt,
				     const struct xdr_buf *xdr)