Re: [PATCH V3 1/2] md: don't unregister sync_thread with reconfig_mutex held

[Guoqing Jiang <guoqing.jiang@linux.dev>]

On 5/6/22 2:04 AM, kernel test robot wrote:
> Hi Guoqing,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on song-md/md-next]
> [also build test WARNING on v5.18-rc5 next-20220505]
> [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/intel-lab-lkp/linux/commits/Guoqing-Jiang/two-fixes-for-md/20220505-162202
> base:   git://git.kernel.org/pub/scm/linux/kernel/git/song/md.git md-next
> config: hexagon-randconfig-r045-20220505 (https://download.01.org/0day-ci/archive/20220506/202205060116.J42KgtCW-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5e004fb787698440a387750db7f8028e7cb14cfc)
> 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/intel-lab-lkp/linux/commit/e8e9c97eb79c337a89a98a92106cfa6139a7c9e0
>          git remote add linux-review https://github.com/intel-lab-lkp/linux
>          git fetch --no-tags linux-review Guoqing-Jiang/two-fixes-for-md/20220505-162202
>          git checkout e8e9c97eb79c337a89a98a92106cfa6139a7c9e0
>          # save the config file
>          mkdir build_dir && cp config build_dir/.config
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/md/
>
> 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/md/md.c:9448:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
>                     mddev_lock(mddev);
>                     ^~~~~~~~~~ ~~~~~
>     1 warning generated.

Thanks! I should call mddev_lock_nointr here.

Guoqing