mlx4_av
memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
struct mlx4_av av;
memcpy(dseg->av, &to_mah(wr->ah)->av, sizeof (struct mlx4_av));
struct mlx4_av sqp_av = {0};
memcpy(dseg->av, &sqp_av, sizeof (struct mlx4_av));
struct mlx4_av ib;