nfsd4: use helper for copying delegation filehandle

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index c464181..c6804db3 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -218,7 +218,7 @@
 encode_cb_recall(struct xdr_stream *xdr, struct nfs4_cb_recall *cb_rec)
 {
 	__be32 *p;
-	int len = cb_rec->cbr_fhlen;
+	int len = cb_rec->cbr_fh.fh_size;
 
 	RESERVE_SPACE(12+sizeof(cb_rec->cbr_stateid) + len);
 	WRITE32(OP_CB_RECALL);
@@ -226,7 +226,7 @@
 	WRITEMEM(&cb_rec->cbr_stateid.si_opaque, sizeof(stateid_opaque_t));
 	WRITE32(cb_rec->cbr_trunc);
 	WRITE32(len);
-	WRITEMEM(cb_rec->cbr_fhval, len);
+	WRITEMEM(&cb_rec->cbr_fh.fh_base, len);
 	return 0;
 }