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