tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.12.y-rt-rebase head: ae0700ef2de03e51d49515f06447c1318a4f0843 commit: 9aaf36ff13a40708994eda539e935f4ee1be4442 [165/191] x86: Support for lazy preemption config: s390-allyesconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/com... git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git git fetch --no-tags linux-rt-devel linux-5.12.y-rt-rebase git checkout 9aaf36ff13a40708994eda539e935f4ee1be4442 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 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 >>): In file included from kernel/entry/common.c:4: kernel/entry/common.c: In function 'exit_to_user_mode_loop': 62 | _TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL | \ | ^~~~~~~~~~~~~~~~~~~~~~ kernel/entry/common.c:157:19: note: in expansion of macro 'EXIT_TO_USER_MODE_WORK' 157 | while (ti_work & EXIT_TO_USER_MODE_WORK) { | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/entry-common.h:62:3: note: each undeclared identifier is reported only once for each function it appears in 62 | _TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL | \ | ^~~~~~~~~~~~~~~~~~~~~~ kernel/entry/common.c:157:19: note: in expansion of macro 'EXIT_TO_USER_MODE_WORK' 157 | while (ti_work & EXIT_TO_USER_MODE_WORK) { | ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/build_bug.h:5, from include/linux/bits.h:22, from arch/s390/include/asm/ptrace.h:10, from arch/s390/include/asm/lowcore.h:13, from arch/s390/include/asm/current.h:13, from include/linux/sched.h:12, from include/linux/context_tracking.h:5, from kernel/entry/common.c:3: kernel/entry/common.c: In function 'exit_to_user_mode_prepare': 62 | _TIF_NEED_RESCHED_MASK | _TIF_PATCH_PENDING | _TIF_NOTIFY_SIGNAL | \ | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ kernel/entry/common.c:215:25: note: in expansion of macro 'EXIT_TO_USER_MODE_WORK' 215 | if (unlikely(ti_work & EXIT_TO_USER_MODE_WORK)) | ^~~~~~~~~~~~~~~~~~~~~~ vim +62 include/linux/entry-common.h 59 60 #define EXIT_TO_USER_MODE_WORK \ 61 (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_UPROBE | \ 63 ARCH_EXIT_TO_USER_MODE_WORK) 64 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org