linux-kernel - Re: [PATCH 2/2] scsi:target:tcmu: reduce once copy by using uio ioctl

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Message-ID: <202202171918.s8P0xa1Y-lkp@intel.com>
Date:   Thu, 17 Feb 2022 19:12:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guixin Liu <kanie@...ux.alibaba.com>, gregkh@...uxfoundation.org,
        bostroesser@...il.com, martin.petersen@...cle.com
Cc:     kbuild-all@...ts.01.org, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        xiaoguang.wang@...ux.alibaba.com, xlpang@...ux.alibaba.com
Subject: Re: [PATCH 2/2] scsi:target:tcmu: reduce once copy by using uio ioctl

Hi Guixin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on mkp-scsi/for-next linux/master linus/master v5.17-rc4 next-20220216]
[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]

url:    https://github.com/0day-ci/linux/commits/Guixin-Liu/uio-add-ioctl-to-uio/20220217-103120
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git e6cb9c167eeb8f90ab924666c573e69e85e700a0
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220217/202202171918.s8P0xa1Y-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/c604d03c2be8ca4b3533bb151bcd2d10379debff
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Guixin-Liu/uio-add-ioctl-to-uio/20220217-103120
        git checkout c604d03c2be8ca4b3533bb151bcd2d10379debff
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/target/

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


sparse warnings: (new ones prefixed by >>)
>> drivers/target/target_core_user.c:1987:6: sparse: sparse: symbol 'tcmu_ioctl_copy_between_sgl_and_iovec' was not declared. Should it be static?
>> drivers/target/target_core_user.c:2031:6: sparse: sparse: symbol 'tcmu_ioctl' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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