tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/urgent head: 0602ec6c74e25dcb8a43961b00eef168fafb8e5e commit: 2726fde5f3900552fcae2d2ac07a05ffba11a491 [6/7] irq_work: Cleanup config: powerpc-randconfig-r021-20200615 (attached as .config) compiler: powerpc-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 git checkout 2726fde5f3900552fcae2d2ac07a05ffba11a491 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/asm-generic/percpu.h:7, from arch/powerpc/include/asm/percpu.h:20, from include/linux/percpu.h:13, from include/linux/hrtimer.h:19, from include/linux/sched.h:20, from arch/powerpc/kernel/time.c:32: 527 | DEFINE_PER_CPU(u8, irq_work_pending); | ^~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:94:44: note: in definition of macro 'DEFINE_PER_CPU_SECTION' 94 | extern __PCPU_ATTRS(sec) __typeof__(type) name; | ^~~~ 527 | DEFINE_PER_CPU(u8, irq_work_pending); | ^~~~~~~~~~~~~~ In file included from arch/powerpc/kernel/time.c:52: include/linux/irq_work.h:39:20: note: previous definition of 'irq_work_pending' was here 39 | static inline bool irq_work_pending(struct irq_work *work) | ^~~~~~~~~~~~~~~~ vim +/irq_work_pending +527 arch/powerpc/kernel/time.c 0fe1ac48bef018 Paul Mackerras 2010-04-13 526 e360adbe29241a Peter Zijlstra 2010-10-14 @527 DEFINE_PER_CPU(u8, irq_work_pending); 0fe1ac48bef018 Paul Mackerras 2010-04-13 528 :::::: The code at line 527 was first introduced by commit :::::: e360adbe29241a0194e10e20595360dd7b98a2b3 irq_work: Add generic hardirq context callbacks :::::: TO: Peter Zijlstra <a.p.zijlstra(a)chello.nl&gt; :::::: CC: Ingo Molnar <mingo(a)elte.hu&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org