[kbuild-all] [peterz-queue:sched/fifo 22/24] kernel/sched/psi.c:620:21: error: use of undeclared identifier 'kworker'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/fifo head: dfa122e2911e086d472738cf17660969dd0d2749 commit: bb0c29eb129a46bd752342902a7b702577420a1c [22/24] sched,psi: Convert to sched_set_fifo_low() config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bc2b70982be8f5250cd0082a7190f8b417bd4dfe) 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 git checkout bb0c29eb129a46bd752342902a7b702577420a1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): sched_set_fifo_low(kworker->task); ^ 1 error generated. vim +/kworker +620 kernel/sched/psi.c 615 616 static int psi_poll_worker(void *data) 617 { 618 struct psi_group *group = (struct psi_group *)data; 619 621 622 while (true) { 623 wait_event_interruptible(group->poll_wait, 624 atomic_cmpxchg(&group->poll_wakeup, 1, 0) || 625 kthread_should_stop()); 626 if (kthread_should_stop()) 627 break; 628 629 psi_poll_work(group); 630 } 631 return 0; 632 } 633 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org