Hi Martin, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 6107040c99d5dfc920721c198d45ed2d639b113a commit: c5a13c319e10e795850b61bc7e3447b08024be2e [10569/11094] sfc: Add a basic Siena module config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20220512/202205120012.rvs9fZKN-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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=c5a13c319e10e795850b61bc7e3447b08024be2e git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c5a13c319e10e795850b61bc7e3447b08024be2e # 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=i386 SHELL=/bin/bash drivers/net/ethernet/sfc/siena/ 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/net/ethernet/sfc/siena/siena_sriov.c:1578:5: sparse: sparse: symbol 'efx_init_sriov' was not declared. Should it be static? >> drivers/net/ethernet/sfc/siena/siena_sriov.c:1590:6: sparse: sparse: symbol 'efx_fini_sriov' 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