nfsd4: use local variable in nfs4svc_encode_compoundres

'cs' is already computed, re-use it.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 05bc5bd..b27bcf3 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3310,9 +3310,9 @@
 		if (cs->status != nfserr_replay_cache) {
 			nfsd4_store_cache_entry(resp);
 			dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
-			resp->cstate.slot->sl_inuse = false;
+			cs->slot->sl_inuse = false;
 		}
-		nfsd4_put_session(resp->cstate.session);
+		nfsd4_put_session(cs->session);
 	}
 	return 1;
 }