tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core head: e337f389dc4d3748ba4342bd2d1c2133346b8691 commit: 92318ca36a5876d444849ea850534488e843f077 [2/4] sched/hotplug: Ensure only per-cpu kthreads run during hotplug config: i386-randconfig-r035-20200913 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 92318ca36a5876d444849ea850534488e843f077 # 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/include/asm/bug.h:93, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/rcupdate.h:27, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/sched/numa_balancing.h:10, from include/trace/events/sched.h:8, from kernel/sched/core.c:10: kernel/sched/sched.h: In function 'rq_pin_lock': kernel/sched/sched.h:1225:18: error: 'struct rq' has no member named 'balance_callback' 1225 | SCHED_WARN_ON(rq->balance_callback); | ^~ include/asm-generic/bug.h:157:27: note: in definition of macro 'WARN_ONCE' 157 | int __ret_warn_once = !!(condition); \ | ^~~~~~~~~ kernel/sched/sched.h:1225:2: note: in expansion of macro 'SCHED_WARN_ON' 1225 | SCHED_WARN_ON(rq->balance_callback); | ^~~~~~~~~~~~~ kernel/sched/core.c: In function 'ttwu_stat': kernel/sched/core.c:2423:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 2423 | struct rq *rq; | ^~ In file included from arch/x86/include/asm/current.h:5, from include/linux/sched.h:12, from include/linux/sched/numa_balancing.h:10, from include/trace/events/sched.h:8, from kernel/sched/core.c:10: kernel/sched/core.c: In function 'finish_lock_switch': kernel/sched/core.c:3584:17: error: 'struct rq' has no member named 'balance_flags' 3584 | if (unlikely(rq->balance_flags)) { | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ kernel/sched/core.c:3590:11: error: 'struct rq' has no member named 'balance_flags' 3590 | !(rq->balance_flags & BALANCE_PUSH) || | ^~ kernel/sched/core.c:3590:29: error: 'BALANCE_PUSH' undeclared (first use in this function) 3590 | !(rq->balance_flags & BALANCE_PUSH) || | ^~~~~~~~~~~~ kernel/sched/core.c:3590:29: note: each undeclared identifier is reported only once for each function it appears in kernel/sched/core.c: In function 'schedule_tail': kernel/sched/core.c:3742:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable] 3742 | struct rq *rq; | ^~ kernel/sched/core.c: At top level: 3574 | static bool balance_push(struct rq *rq); | ^~~~~~~~~~~~ # 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 fetch --no-tags peterz-queue sched/core git checkout 92318ca36a5876d444849ea850534488e843f077 vim +/balance_push +3574 kernel/sched/core.c 3573 3575 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org