rxe_pool_get_index
ah = rxe_pool_get_index(&pkt->rxe->ah_pool, ah_num);
mr = rxe_pool_get_index(&rxe->mr_pool, index);
mr = rxe_pool_get_index(&rxe->mr_pool, key >> 8);
mw = rxe_pool_get_index(&rxe->mw_pool, mw_rkey >> 8);
mr = rxe_pool_get_index(&rxe->mr_pool, mr_lkey >> 8);
mw = rxe_pool_get_index(&rxe->mw_pool, rkey >> 8);
mw = rxe_pool_get_index(&rxe->mw_pool, index);
void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
qp = rxe_pool_get_index(&rxe->qp_pool, index);
mw = rxe_pool_get_index(&rxe->mw_pool, rkey >> 8);
mr = rxe_pool_get_index(&rxe->mr_pool, rkey >> 8);