Hi Zhang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: e1106320058bf1d983657f80490249b4f919ebad commit: 926b9b0cd97e640ee680347cf449c3dc152dddd2 [2220/2220] sched: Throttle qos cfs_rq when current cpu is running online task config: x86_64-randconfig-122-20250513 (https://download.01.org/0day-ci/archive/20250513/202505131239.WbFmKdYn-lkp@i...) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250513/202505131239.WbFmKdYn-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202505131239.WbFmKdYn-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from kernel/sched/fair.c:27: In file included from include/linux/mm_api.h:1: In file included from include/linux/mm.h:2174: include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~

...

kernel/sched/fair.c:8325:9: error: call to undeclared function 'sched_idle_cpu'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 8325 | !sched_idle_cpu(smp_processor_id()) && | ^ kernel/sched/fair.c:8325:9: note: did you mean 'sched_idle_rq'? kernel/sched/fair.c:6517:12: note: 'sched_idle_rq' declared here 6517 | static int sched_idle_rq(struct rq *rq) | ^ kernel/sched/fair.c:8328:23: error: no member named 'online' in 'struct rq' 8328 | if (!rq_of(cfs_rq)->online) | ~~~~~~~~~~~~~ ^ kernel/sched/fair.c:8531:7: error: no member named 'idle_stamp' in 'struct rq'; did you mean 'idle_state'? 8531 | rq->idle_stamp = 0; | ^~~~~~~~~~ | idle_state kernel/sched/sched.h:1143:24: note: 'idle_state' declared here 1143 | struct cpuidle_state *idle_state; | ^ 1 warning and 3 errors generated.

vim +/sched_idle_cpu +8325 kernel/sched/fair.c 8321 8322 static bool check_qos_cfs_rq(struct cfs_rq *cfs_rq) 8323 { 8324 if (unlikely(cfs_rq && cfs_rq->tg->qos_level < 0 &&

8325 !sched_idle_cpu(smp_processor_id()) && 8326 cfs_rq->h_nr_running == cfs_rq->idle_h_nr_running)) { 8327 8328 if (!rq_of(cfs_rq)->online) 8329 return false; 8330 8331 throttle_qos_cfs_rq(cfs_rq); 8332 return true; 8333 } 8334 8335 return false; 8336 } 8337

-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki