tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core head: b2d5b9cec60fecc72a13191c2c6c05acf60975a5 commit: f43df9225fcad9b07a4ef4d0fe4c3ad2fb4ce82d [45/47] sched/topology: Remove unused numa_distance in cpu_attach_domain() config: hexagon-buildonly-randconfig-r004-20211012 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=f43df9225fcad9b07a4ef4d0fe4c3ad2fb4ce82d git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip sched/core git checkout f43df9225fcad9b07a4ef4d0fe4c3ad2fb4ce82d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): >> kernel/sched/topology.c:23:20: error: unused function 'sched_debug' [-Werror,-Wunused-function] static inline bool sched_debug(void) ^ 1 error generated. vim +/sched_debug +23 kernel/sched/topology.c f2cb13609d5397 Ingo Molnar 2017-02-01 22 f2cb13609d5397 Ingo Molnar 2017-02-01 @23 static inline bool sched_debug(void) f2cb13609d5397 Ingo Molnar 2017-02-01 24 { 9406415f46f612 Peter Zijlstra 2021-04-15 25 return sched_debug_verbose; f2cb13609d5397 Ingo Molnar 2017-02-01 26 } f2cb13609d5397 Ingo Molnar 2017-02-01 27 :::::: The code at line 23 was first introduced by commit :::::: f2cb13609d5397cdd747f3ed6fb651233851717d sched/topology: Split out scheduler topology code from core.c into topology.c :::::: TO: Ingo Molnar :::::: CC: Ingo Molnar --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org