tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: be65473fb5b77d57d8955beffd5aa370cfdae467 [176/364] sched/headers, rcu: Remove <linux/sched/signal.h> dependency from <linux/rcuwait.h> config: i386-tinyconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=be... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout be65473fb5b77d57d8955beffd5aa370cfdae467 # 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; All warnings (new ones prefixed by >>): In file included from arch/x86/events/intel/bts.c:16: 37 | static inline void do_coredump(const struct kernel_siginfo *siginfo) {} | ^~~~~~~~~~~~~~ vim +37 include/linux/coredump.h 19 20 /* 21 * These are the only things you should do on a core-file: use only these 22 * functions to write out all the necessary info. 23 */ 24 struct coredump_params; 25 struct kernel_siginfo; 26 extern void dump_skip_to(struct coredump_params *cprm, unsigned long to); 27 extern void dump_skip(struct coredump_params *cprm, size_t nr); 28 extern int dump_emit(struct coredump_params *cprm, const void *addr, int nr); 29 extern int dump_align(struct coredump_params *cprm, int align); 30 int dump_user_range(struct coredump_params *cprm, unsigned long start, 31 unsigned long len); 32 int dump_vma_snapshot(struct coredump_params *cprm, int *vma_count, 33 struct core_vma_metadata **vma_meta, 34 size_t *vma_data_size_ptr); 35 extern void do_coredump(const struct kernel_siginfo *siginfo); 36 #else 38 #endif 39 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org