Hi Tim, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: bf0212daf6239e1b0e65e6dd7ee9fdec378c5dd4 commit: f4128ae8e6ff03b4c805707fe75d0345797f7f53 [2451/2451] sched: Add cluster scheduler level for x86 config: x86_64-buildonly-randconfig-003-20241119 (https://download.01.org/0day-ci/archive/20241120/202411201827.IfsNluS9-lkp@i...) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241120/202411201827.IfsNluS9-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/202411201827.IfsNluS9-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from kernel/sched/topology.c:5: In file included from kernel/sched/sched.h:39: In file included from include/linux/blkdev.h:9: In file included from include/linux/genhd.h:20: In file included from include/linux/blk_types.h:11: In file included from include/linux/bvec.h:14: In file included from include/linux/mm.h:1579: include/linux/vmstat.h:417:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 417 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 418 | item]; | ~~~~ include/linux/vmstat.h:424:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 424 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 425 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:431:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 431 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:436:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 436 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 437 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:445:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 445 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 446 | NR_VM_NUMA_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ In file included from kernel/sched/topology.c:5: kernel/sched/sched.h:1838:15: warning: cast from 'void (*)(struct rq *)' to 'void (*)(struct callback_head *)' converts to incompatible function type [-Wcast-function-type-strict] 1838 | head->func = (void (*)(struct callback_head *))func; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/topology.c:718:6: warning: variable 'numa_distance' set but not used [-Wunused-but-set-variable] 718 | int numa_distance = 0; | ^

...

kernel/sched/topology.c:1749:2: error: implicit declaration of function 'register_sysctl_init' [-Werror,-Wimplicit-function-declaration] 1749 | register_sysctl_init("kernel", sched_cluster_sysctls); | ^ 7 warnings and 1 error generated.

vim +/register_sysctl_init +1749 kernel/sched/topology.c 8ce3e706b31409 Tim Chen 2021-12-03 1746 8ce3e706b31409 Tim Chen 2021-12-03 1747 static int __init sched_cluster_sysctl_init(void) 8ce3e706b31409 Tim Chen 2021-12-03 1748 { 8ce3e706b31409 Tim Chen 2021-12-03 @1749 register_sysctl_init("kernel", sched_cluster_sysctls); 8ce3e706b31409 Tim Chen 2021-12-03 1750 return 0; 8ce3e706b31409 Tim Chen 2021-12-03 1751 } 8ce3e706b31409 Tim Chen 2021-12-03 1752 late_initcall(sched_cluster_sysctl_init); 9e68cc2bf535a2 Tim Chen 2021-12-03 1753 :::::: The code at line 1749 was first introduced by commit :::::: 8ce3e706b31409147f035c037055caa68e450ce5 scheduler: Add runtime knob sysctl_sched_cluster :::::: TO: Tim Chen <tim.c.chen@linux.intel.com> :::::: CC: Jie Liu <liujie375@h-partners.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki