ib_create_user_ah
ah = ib_create_user_ah(agent->qp->pd, &ah_attr, NULL);
ah = ib_create_user_ah(pd, &attr, &attrs->driver_udata);
EXPORT_SYMBOL(ib_create_user_ah);
struct ib_ah *ib_create_user_ah(struct ib_pd *pd,