do_semop
return do_semop(l, SCARG(uap, semid), SCARG(uap, sops),
return do_semop(l, semid, sops, nsops, utimeout, retval, copyin);
return do_semop(l, semid, sops, nsops, NULL, retval, copyin);
int do_semop(struct lwp *, int, struct sembuf *, size_t, void *, register_t *,