VOP_NMKNOD
error = VOP_NMKNOD(&nd->nl_nch, nd->nl_dvp,
error = VOP_NMKNOD(&nd->nl_nch, nd->nl_dvp, &vp, nd->nl_cred, &vattr);
error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap);
error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap);