nfsrv_updatelock
static void nfsrv_updatelock(struct nfsstate *stp, struct nfslock **new_lopp,
nfsrv_updatelock(stp, new_lopp, &other_lop, lfp);
nfsrv_updatelock(lckstp, new_lopp, &other_lop, lfp);
nfsrv_updatelock(NULL, &new_lop, &other_lop, lfp);