tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.15 head: ce3629841262f725a5f3a327403fcaf0e604a85e commit: c40ac46dd98eac3ed1ab60d72d54344a4ead0e92 [9/139] x86/resctrl: Remove architecture copy of mbps_val config: x86_64-buildonly-randconfig-r001-20211112 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dddeeafb529e769cde87bd29ef6271ac6bfa5c) 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/morse/linux.git/commit/?i... git remote add morse https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git git fetch --no-tags morse mpam/snapshot/v5.15 git checkout c40ac46dd98eac3ed1ab60d72d54344a4ead0e92 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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 warnings (new ones prefixed by >>): void setup_default_ctrlval(struct rdt_resource *r, u32 *dc) ^ arch/x86/kernel/cpu/resctrl/core.c:400:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void setup_default_ctrlval(struct rdt_resource *r, u32 *dc) ^ static arch/x86/kernel/cpu/resctrl/core.c:414:6: warning: no previous prototype for function 'domain_free' [-Wmissing-prototypes] void domain_free(struct rdt_hw_domain *hw_dom) ^ arch/x86/kernel/cpu/resctrl/core.c:414:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void domain_free(struct rdt_hw_domain *hw_dom) ^ static 2 warnings generated. vim +/setup_default_ctrlval +400 arch/x86/kernel/cpu/resctrl/core.c 399 401 { 402 struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r); 403 int i; 404 405 /* 406 * Initialize the Control MSRs to having no control. 407 * For Cache Allocation: Set all bits in cbm 408 * For Memory Allocation: Set b/w requested to 100% 409 */ 410 for (i = 0; i < hw_res->num_closid; i++, dc++) 411 *dc = r->default_ctrl; 412 } 413 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org