+void lustre_swab_batch_update_request(struct batch_update_request *bur);
+void lustre_swab_but_update_header(struct but_update_header *buh);
+void lustre_swab_but_update_buffer(struct but_update_buffer *bub);
+void lustre_swab_batch_update_reply(struct batch_update_reply *bur);