tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/urgent head: 0602ec6c74e25dcb8a43961b00eef168fafb8e5e commit: 2726fde5f3900552fcae2d2ac07a05ffba11a491 [6/7] irq_work: Cleanup :::::: branch date: 5 hours ago :::::: commit date: 5 hours ago config: powerpc-randconfig-s032-20200615 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc1-3-g55607964-dirty git checkout 2726fde5f3900552fcae2d2ac07a05ffba11a491 # save the attached .config to linux build tree make W=1 C=1 ARCH=powerpc CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) arch/powerpc/kernel/time.c:134:1: sparse: sparse: symbol 'rtc_lock' was not declared. Should it be static? arch/powerpc/kernel/time.c:527:1: sparse: sparse: symbol 'irq_work_pending' redeclared with different type (different base types): # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git remote update peterz-queue git checkout 2726fde5f3900552fcae2d2ac07a05ffba11a491 vim +39 include/linux/irq_work.h e360adbe29241a0 Peter Zijlstra 2010-10-14 38 2726fde5f390055 Peter Zijlstra 2020-06-15 @39 static inline bool irq_work_pending(struct irq_work *work) 2726fde5f390055 Peter Zijlstra 2020-06-15 40 { 2726fde5f390055 Peter Zijlstra 2020-06-15 41 return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING; 153bedbac2ebd47 Frederic Weisbecker 2019-11-08 42 } 153bedbac2ebd47 Frederic Weisbecker 2019-11-08 43 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org