tree: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master head: 119aadf816f5373dc82ca4109d6d5b777e00475b commit: f2bc8ad31a7f814237bc6301d59296d76505a688 [2177/2199] net: ethtool: Allow PHY cable test TDR data to configured config: x86_64-randconfig-s022-20200527 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-240-gf0fe1cd9-dirty git checkout f2bc8ad31a7f814237bc6301d59296d76505a688 # save the attached .config to linux build tree make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot sparse warnings: (new ones prefixed by >>) >> net/ethtool/cabletest.c:230:5: sparse: sparse: symbol 'ethnl_act_cable_test_tdr_cfg' 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