tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.9.y-rt-rebase head: ad296faac1081af0dbabcfc491d6c2baaa08f901 commit: 71341ba61f5c708c3557551c843beaf815b59c6a [13/215] printk: minimize console locking implementation config: i386-randconfig-a002-20200916 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 71341ba61f5c708c3557551c843beaf815b59c6a # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the linux-rt-devel/linux-5.9.y-rt-rebase HEAD ad296faac1081af0dbabcfc491d6c2baaa08f901 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org