Subject: Re: linux-next: build failure after merge of the block tree

From: kernel test robot <[email-masked]>
Date: Wed, 15 Apr 2026 19:31:49 +0800

Hi Mark,

kernel test robot noticed the following build errors:

[auto build test ERROR on axboe/for-next]
[also build test ERROR on isilence/zcrx/for-next]
[cannot apply to linus/master v7.0 next-20260414]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Mark-Brown/linux-next-build-failure-after-merge-of-the-block-tree/20260415-013341
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git for-next
patch link:    https://lore.kernel.org/r/adjrVagmLJaozz5o%40sirena.co.uk
patch subject: linux-next: build failure after merge of the block tree
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20260415/[email-masked]/config)
compiler: sh4-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260415/[email-masked]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All errors (new ones prefixed by >>):

   io_uring/zcrx.c: In function 'zcrx_register_netdev':
>> io_uring/zcrx.c:812:15: error: implicit declaration of function 'netif_mp_open_rxq'; did you mean 'net_mp_open_rxq'? [-Wimplicit-function-declaration]
     812 |         ret = netif_mp_open_rxq(ifq->netdev, if_rxq, &mp_param, NULL);
         |               ^~~~~~~~~~~~~~~~~
         |               net_mp_open_rxq

vim +812 io_uring/zcrx.c

   781	
   782	static int zcrx_register_netdev(struct io_zcrx_ifq *ifq,
   783					struct io_uring_zcrx_ifq_reg *reg,
   784					struct io_uring_zcrx_area_reg *area)
   785	{
   786		struct pp_memory_provider_params mp_param = {};
   787		unsigned if_rxq = reg->if_rxq;
   788		int ret;
   789	
   790		ifq->netdev = netdev_get_by_index_lock(current->nsproxy->net_ns,
   791							reg->if_idx);
   792		if (!ifq->netdev)
   793			return -ENODEV;
   794	
   795		netdev_hold(ifq->netdev, &ifq->netdev_tracker, GFP_KERNEL);
   796	
   797		ifq->dev = netdev_queue_get_dma_dev(ifq->netdev, if_rxq);
   798		if (!ifq->dev) {
   799			ret = -EOPNOTSUPP;
   800			goto netdev_put_unlock;
   801		}
   802		get_device(ifq->dev);
   803	
   804		ret = io_zcrx_create_area(ifq, area, reg);
   805		if (ret)
   806			goto netdev_put_unlock;
   807	
   808		if (reg->rx_buf_len)
   809			mp_param.rx_page_size = 1U << ifq->niov_shift;
   810		mp_param.mp_ops = &io_uring_pp_zc_ops;
   811		mp_param.mp_priv = ifq;
 > 812		ret = netif_mp_open_rxq(ifq->netdev, if_rxq, &mp_param, NULL);
   813		if (ret)
   814			goto netdev_put_unlock;
   815	
   816		ifq->if_rxq = if_rxq;
   817		ret = 0;
   818	netdev_put_unlock:
   819		netdev_unlock(ifq->netdev);
   820		return ret;
   821	}
   822	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki