lf_advlockasync
error = lf_advlockasync(ap, &(vp->v_lockf), size);
return (lf_advlockasync(&a, statep, size));
return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size));
error = lf_advlockasync(&a, &vp->v_lockf, size);
int lf_advlockasync(struct vop_advlockasync_args *, struct lockf **, u_quad_t);