Hi Serge, I love your patch! Perhaps something to improve: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on robh/for-next linus/master v5.18-rc6 next-20220513] [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/Serge-Semin/ata-ahci-Add-DWC-Baikal-T1-AHCI-SATA-support/20220512-072125 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: x86_64-rhel-8.3-kselftests (https://download.01.org/0day-ci/archive/20220514/202205140748.Lb7DqbPf-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.2.0-20) 11.2.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/intel-lab-lkp/linux/commit/bc74e5ca4cbfd2bef25a9ecefc401e7d1af3df43 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Serge-Semin/ata-ahci-Add-DWC-Baikal-T1-AHCI-SATA-support/20220512-072125 git checkout bc74e5ca4cbfd2bef25a9ecefc401e7d1af3df43 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/ata/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/ata/ahci_dwc.c:414:27: sparse: sparse: symbol 'ahci_dwc_plat' was not declared. Should it be static? Please review and possibly fold the followup patch. -- 0-DAY CI Kernel Test Service https://01.org/lkp