tree: https://github.com/0day-ci/linux/commits/UPDATE-20210116-045420/Tony-Luck... head: 12eccb268478ec9d85f923d1537aa264e45efd68 commit: 12eccb268478ec9d85f923d1537aa264e45efd68 x86/mce: Avoid infinite loop for copy from user recovery date: 31 hours ago config: x86_64-rhel-7.6-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/12eccb268478ec9d85f923d1537aa264e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210116-045420/Tony-Luck/x86-mce-Avoid-infinite-loop-for-copy-from-user-recovery/20210115-113535 git checkout 12eccb268478ec9d85f923d1537aa264e45efd68 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/x86/kernel/cpu/mce/core.c: In function 'kill_me_now': 1253 | p->mce_count = 0; | ^ | up arch/x86/kernel/cpu/mce/core.c:1253:2: note: each undeclared identifier is reported only once for each function it appears in vim +1253 arch/x86/kernel/cpu/mce/core.c 1250 1251 static void kill_me_now(struct callback_head *ch) 1252 { 1254 force_sig(SIGBUS); 1255 } 1256 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org