[PATCHv2 2/5] nvme: simplify passthrough bio cleanup

[kernel test robot]

Hi Keith,

kernel test robot noticed the following build warnings:

[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on next-20230406]
[cannot apply to linus/master v6.3-rc6]
[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/Keith-Busch/block-add-request-polling-helper/20230408-031926
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20230407191636.2631046-3-kbusch%40meta.com
patch subject: [PATCHv2 2/5] nvme: simplify passthrough bio cleanup
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20230411/202304110443.e026C3nq-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/9a32e7ca02dd8cff559b273fe161b5347b5b5c97
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Keith-Busch/block-add-request-polling-helper/20230408-031926
        git checkout 9a32e7ca02dd8cff559b273fe161b5347b5b5c97
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/nvme/host/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304110443.e026C3nq-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/nvme/host/ioctl.c: In function 'nvme_submit_user_cmd':
   drivers/nvme/host/ioctl.c:232:21: warning: variable 'bio' set but not used [-Wunused-but-set-variable]
     232 |         struct bio *bio;
         |                     ^~~
   drivers/nvme/host/ioctl.c: In function 'nvme_uring_cmd_end_io_meta':
>> drivers/nvme/host/ioctl.c:528:36: warning: unused variable 'pdu' [-Wunused-variable]
     528 |         struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
         |                                    ^~~


vim +/pdu +528 drivers/nvme/host/ioctl.c

c0a7ba77e81b84 Jens Axboe    2022-09-21  523  
c0a7ba77e81b84 Jens Axboe    2022-09-21  524  static enum rq_end_io_ret nvme_uring_cmd_end_io_meta(struct request *req,
c0a7ba77e81b84 Jens Axboe    2022-09-21  525  						     blk_status_t err)
c0a7ba77e81b84 Jens Axboe    2022-09-21  526  {
c0a7ba77e81b84 Jens Axboe    2022-09-21  527  	struct io_uring_cmd *ioucmd = req->end_io_data;
c0a7ba77e81b84 Jens Axboe    2022-09-21 @528  	struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd);
c0a7ba77e81b84 Jens Axboe    2022-09-21  529  	void *cookie = READ_ONCE(ioucmd->cookie);
c0a7ba77e81b84 Jens Axboe    2022-09-21  530  
c0a7ba77e81b84 Jens Axboe    2022-09-21  531  	/*
c0a7ba77e81b84 Jens Axboe    2022-09-21  532  	 * For iopoll, complete it directly.
c0a7ba77e81b84 Jens Axboe    2022-09-21  533  	 * Otherwise, move the completion to task work.
c0a7ba77e81b84 Jens Axboe    2022-09-21  534  	 */
c0a7ba77e81b84 Jens Axboe    2022-09-21  535  	if (cookie != NULL && blk_rq_is_poll(req))
9d2789ac9d60c0 Jens Axboe    2023-03-20  536  		nvme_uring_task_meta_cb(ioucmd, IO_URING_F_UNLOCKED);
c0a7ba77e81b84 Jens Axboe    2022-09-21  537  	else
c0a7ba77e81b84 Jens Axboe    2022-09-21  538  		io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_meta_cb);
c0a7ba77e81b84 Jens Axboe    2022-09-21  539  
de671d6116b521 Jens Axboe    2022-09-21  540  	return RQ_END_IO_NONE;
456cba386e94f2 Kanchan Joshi 2022-05-11  541  }
456cba386e94f2 Kanchan Joshi 2022-05-11  542  

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