tree:   https://github.com/dsahern/linux nvme-tcp-offload
head:   b9ae3391dc24a401030b31ad5363e0471ae386e0
commit: cd0edfa1a5a01a42b609ffcf907dd3d52cba8045 [12/15] net/mlx5e: NVMEoTCP DDP offload control path
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/dsahern/linux/commit/cd0edfa1a5a01a42b609ffcf907dd3d52cba8045
        git remote add dsahern-linux https://github.com/dsahern/linux
        git fetch --no-tags dsahern-linux nvme-tcp-offload
        git checkout cd0edfa1a5a01a42b609ffcf907dd3d52cba8045
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c: In function 'mlx5e_napi_poll':
>> drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c:163:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
     163 |  struct list_head *cur;
         |  ^~~~~~

vim +163 drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c

   116	
   117	int mlx5e_napi_poll(struct napi_struct *napi, int budget)
   118	{
   119		struct mlx5e_channel *c = container_of(napi, struct mlx5e_channel,
   120						       napi);
   121		struct mlx5e_ch_stats *ch_stats = c->stats;
   122		struct mlx5e_xdpsq *xsksq = &c->xsksq;
   123		struct mlx5e_rq *xskrq = &c->xskrq;
   124		struct mlx5e_rq *rq = &c->rq;
   125		bool aff_change = false;
   126		bool busy_xsk = false;
   127		bool busy = false;
   128		int work_done = 0;
   129		bool xsk_open;
   130		int i;
   131	
   132		rcu_read_lock();
   133	
   134		xsk_open = test_bit(MLX5E_CHANNEL_STATE_XSK, c->state);
   135	
   136		ch_stats->poll++;
   137	
   138		for (i = 0; i < c->num_tc; i++)
   139			busy |= mlx5e_poll_tx_cq(&c->sq[i].cq, budget);
   140	
   141		busy |= mlx5e_poll_xdpsq_cq(&c->xdpsq.cq);
   142	
   143		if (c->xdp)
   144			busy |= mlx5e_poll_xdpsq_cq(&c->rq_xdpsq.cq);
   145	
   146		if (likely(budget)) { /* budget=0 means: don't poll rx rings */
   147			if (xsk_open)
   148				work_done = mlx5e_poll_rx_cq(&xskrq->cq, budget);
   149	
   150			if (likely(budget - work_done))
   151				work_done += mlx5e_poll_rx_cq(&rq->cq, budget - work_done);
   152	
   153			busy |= work_done == budget;
   154		}
   155	
   156		mlx5e_poll_ico_cq(&c->icosq.cq);
   157		if (mlx5e_poll_ico_cq(&c->async_icosq.cq))
   158			/* Don't clear the flag if nothing was polled to prevent
   159			 * queueing more WQEs and overflowing the async ICOSQ.
   160			 */
   161			clear_bit(MLX5E_SQ_STATE_PENDING_XSK_TX, &c->async_icosq.state);
   162	#ifdef CONFIG_MLX5_EN_NVMEOTCP
 > 163		struct list_head *cur;
   164		struct mlx5e_nvmeotcp_sq *nvmeotcp_sq;
   165	
   166		list_for_each(cur, &c->list_nvmeotcpsq) {
   167			nvmeotcp_sq = list_entry(cur, struct mlx5e_nvmeotcp_sq, list);
   168			mlx5e_poll_ico_cq(&nvmeotcp_sq->icosq.cq);
   169		}
   170	#endif
   171	
   172		busy |= INDIRECT_CALL_2(rq->post_wqes,
   173					mlx5e_post_rx_mpwqes,
   174					mlx5e_post_rx_wqes,
   175					rq);
   176		if (xsk_open) {
   177			busy |= mlx5e_poll_xdpsq_cq(&xsksq->cq);
   178			busy_xsk |= mlx5e_napi_xsk_post(xsksq, xskrq);
   179		}
   180	
   181		busy |= busy_xsk;
   182	
   183		if (busy) {
   184			if (likely(mlx5e_channel_no_affinity_change(c))) {
   185				work_done = budget;
   186				goto out;
   187			}
   188			ch_stats->aff_change++;
   189			aff_change = true;
   190			if (budget && work_done == budget)
   191				work_done--;
   192		}
   193	
   194		if (unlikely(!napi_complete_done(napi, work_done)))
   195			goto out;
   196	
   197		ch_stats->arm++;
   198	
   199		for (i = 0; i < c->num_tc; i++) {
   200			mlx5e_handle_tx_dim(&c->sq[i]);
   201			mlx5e_cq_arm(&c->sq[i].cq);
   202		}
   203	
   204		mlx5e_handle_rx_dim(rq);
   205	
   206		mlx5e_cq_arm(&rq->cq);
   207		mlx5e_cq_arm(&c->icosq.cq);
   208		mlx5e_cq_arm(&c->async_icosq.cq);
   209	#ifdef CONFIG_MLX5_EN_NVMEOTCP
   210		list_for_each(cur, &c->list_nvmeotcpsq) {
   211			nvmeotcp_sq = list_entry(cur, struct mlx5e_nvmeotcp_sq, list);
   212			mlx5e_cq_arm(&nvmeotcp_sq->icosq.cq);
   213		}
   214	#endif
   215		mlx5e_cq_arm(&c->xdpsq.cq);
   216	
   217		if (xsk_open) {
   218			mlx5e_handle_rx_dim(xskrq);
   219			mlx5e_cq_arm(&xsksq->cq);
   220			mlx5e_cq_arm(&xskrq->cq);
   221		}
   222	
   223		if (unlikely(aff_change && busy_xsk)) {
   224			mlx5e_trigger_irq(&c->icosq);
   225			ch_stats->force_irq++;
   226		}
   227	
   228	out:
   229		rcu_read_unlock();
   230	
   231		return work_done;
   232	}
   233	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org