tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/resctrl_merge_cdp/v2 head: e37b40a07b6b4fbcf573c03dcdf303a82edceeb1 commit: 675bc0dd2e66e0e4ff54ac72a5d020a94ad9931e [20/24] x86/resctrl: Apply offset correction when config is staged config: x86_64-randconfig-a003-20210312 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7b153b43d3a14d76975039408c4b922beb576735) 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 # 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/resctrl_merge_cdp/v2 git checkout 675bc0dd2e66e0e4ff54ac72a5d020a94ad9931e # 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 warnings (new ones prefixed by >>): msr_param.high =+ 1; ^~ 1 warning generated. vim +315 arch/x86/kernel/cpu/resctrl/ctrlmondata.c 273 274 int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid) 275 { 276 struct resctrl_staged_config *cfg; 277 struct rdt_hw_domain *hw_dom; 278 bool msr_param_init = false; 279 struct msr_param msr_param; 280 enum resctrl_conf_type t; 281 cpumask_var_t cpu_mask; 282 struct rdt_domain *d; 283 bool mba_sc; 284 int cpu; 285 u32 idx; 286 287 if (!zalloc_cpumask_var(&cpu_mask, GFP_KERNEL)) 288 return -ENOMEM; 289 290 msr_param.res = r; 291 292 mba_sc = is_mba_sc(r); 293 list_for_each_entry(d, &r->domains, list) { 294 hw_dom = resctrl_to_arch_dom(d); 295 for (t = 0; t < CDP_NUM_TYPES; t++) { 296 cfg = &hw_dom->resctrl.staged_config[t]; 297 if (!cfg->have_new_ctrl) 298 continue; 299 300 idx = cbm_idx(r, closid); 301 if (!apply_config(hw_dom, cfg, idx, cpu_mask, mba_sc)) 302 continue; 303 304 if (!msr_param_init) { 305 msr_param.low = idx; 306 msr_param.high = idx; 307 msr_param_init = true; 308 } else { 309 msr_param.low = min(msr_param.low, idx); 310 msr_param.high = max(msr_param.high, idx); 311 } 312 } 313 } 314 316 317 /* 318 * Avoid writing the control msr with control values when 319 * MBA software controller is enabled 320 */ 321 if (cpumask_empty(cpu_mask) || mba_sc) 322 goto done; 323 cpu = get_cpu(); 324 /* Update resource control msr on this CPU if it's in cpu_mask. */ 325 if (cpumask_test_cpu(cpu, cpu_mask)) 326 rdt_ctrl_update(&msr_param); 327 /* Update resource control msr on other CPUs. */ 328 smp_call_function_many(cpu_mask, rdt_ctrl_update, &msr_param, 1); 329 put_cpu(); 330 331 done: 332 free_cpumask_var(cpu_mask); 333 334 return 0; 335 } 336 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org