Hi Mathieu, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on tip/x86/asm] [also build test ERROR on tip/sched/core] [cannot apply to linus/master linux/master v5.8-rc1 next-20200615] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Mathieu-Desnoyers/sched_pair_cpu... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 2ce0d7f9766f0e49bb54f149c77bae89464932fb config: alpha-allyesconfig (attached as .config) compiler: alpha-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 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 <<): kernel/sched/core.c:2246:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 2246 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ In file included from include/linux/printk.h:6, from include/linux/kernel.h:15, from include/asm-generic/bug.h:19, from arch/alpha/include/asm/bug.h:23, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/current.h:5, from ./arch/alpha/include/generated/asm/current.h:1, from include/linux/sched.h:12, from kernel/sched/sched.h:5, from kernel/sched/core.c:9: 8218 | late_initcall(pair_cpu_spawn_workers); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/init.h:197:50: note: in definition of macro '___define_initcall' 197 | __attribute__((__section__(#__sec ".init"))) = fn; | ^~ include/linux/init.h:231:28: note: in expansion of macro '__define_initcall' 231 | #define late_initcall(fn) __define_initcall(fn, 7) | ^~~~~~~~~~~~~~~~~ 8218 | late_initcall(pair_cpu_spawn_workers); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors -- <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] -- <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] -- arch/alpha/kernel/asm-offsets.c:15:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 15 | void foo(void) | ^~~ <stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] vim +8218 kernel/sched/core.c 8217 8219 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org