nfsd: Cleanup nfs4svc_encode_compoundres

Move the slot return, put session etc into a helper in fs/nfsd/nfs4state.c
instead of open coding in nfs4svc_encode_compoundres.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9388a43..21ffb9b 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -4000,7 +4000,6 @@
 	/*
 	 * All that remains is to write the tag and operation count...
 	 */
-	struct nfsd4_compound_state *cs = &resp->cstate;
 	struct xdr_buf *buf = resp->xdr.buf;
 
 	WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
@@ -4014,19 +4013,7 @@
 	p += XDR_QUADLEN(resp->taglen);
 	*p++ = htonl(resp->opcnt);
 
-	if (nfsd4_has_session(cs)) {
-		struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
-		struct nfs4_client *clp = cs->session->se_client;
-		if (cs->status != nfserr_replay_cache) {
-			nfsd4_store_cache_entry(resp);
-			cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
-		}
-		/* Renew the clientid on success and on replay */
-		spin_lock(&nn->client_lock);
-		nfsd4_put_session(cs->session);
-		spin_unlock(&nn->client_lock);
-		put_client_renew(clp);
-	}
+	nfsd4_sequence_done(resp);
 	return 1;
 }