Hi Scott, I love your patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on v5.12] [cannot apply to tip/sched/core tip/master linus/master next-20210428] [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] url: https://github.com/0day-ci/linux/commits/Scott-Wood/newidle_balance-PREEMPT_RT-latency-mitigations/20210429-073033 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1fe5501ba1abf2b7e78295df73675423bd6899a0 config: x86_64-randconfig-a006-20210428 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9131a078901b00e68248a27a4f8c4b11bb1db1ae) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/a88b1e73d8edba9a004ca170d136eccc8bcf7e9f git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Scott-Wood/newidle_balance-PREEMPT_RT-latency-mitigations/20210429-073033 git checkout a88b1e73d8edba9a004ca170d136eccc8bcf7e9f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> kernel/sched/fair.c:9507:40: error: implicit declaration of function 'rq_has_higher_tasks' [-Werror,-Wimplicit-function-declaration] return env->idle == CPU_NEWLY_IDLE && rq_has_higher_tasks(env->dst_rq); ^ kernel/sched/fair.c:9564:11: error: implicit declaration of function 'rq_has_higher_tasks' [-Werror,-Wimplicit-function-declaration] return !rq_has_higher_tasks(env->dst_rq); ^ 2 errors generated. vim +/rq_has_higher_tasks +9507 kernel/sched/fair.c 9504 9505 static bool stop_balance_early(struct lb_env *env) 9506 { > 9507 return env->idle == CPU_NEWLY_IDLE && rq_has_higher_tasks(env->dst_rq); 9508 } 9509 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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