Hi Tejun, I love your patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on linus/master v6.2-rc5 next-20230127] [cannot apply to tip/sched/core tj-cgroup/for-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Tejun-Heo/sched-Encapsulate-task-attribute-change-sequence-into-a-helper-macro/20230128-123001 patch link: https://lore.kernel.org/r/20230128001639.3510083-9-tj%40kernel.org patch subject: [PATCH 08/30] sched: Expose css_tg(), __setscheduler_prio() and SCHED_CHANGE_BLOCK() config: arc-defconfig (https://download.01.org/0day-ci/archive/20230129/202301290130.A9xDBZbR-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 12.1.0 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://github.com/intel-lab-lkp/linux/commit/49fe6fbf20db85f7bd19f55cdcd7e957ae0f0983 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Tejun-Heo/sched-Encapsulate-task-attribute-change-sequence-into-a-helper-macro/20230128-123001 git checkout 49fe6fbf20db85f7bd19f55cdcd7e957ae0f0983 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> kernel/sched/core.c:6967:6: warning: no previous prototype for '__setscheduler_prio' [-Wmissing-prototypes] 6967 | void __setscheduler_prio(struct task_struct *p, int prio) | ^~~~~~~~~~~~~~~~~~~ vim +/__setscheduler_prio +6967 kernel/sched/core.c 6966 > 6967 void __setscheduler_prio(struct task_struct *p, int prio) 6968 { 6969 if (dl_prio(prio)) 6970 p->sched_class = &dl_sched_class; 6971 else if (rt_prio(prio)) 6972 p->sched_class = &rt_sched_class; 6973 else 6974 p->sched_class = &fair_sched_class; 6975 6976 p->prio = prio; 6977 } 6978 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
