tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v5.16 head: 364c1c42b229912132e1615c2ce15be7154e2156 commit: 14660e9725835a4ec28fbc00f4f5f742c673383f [92/137] arm_mpam: Add the class and component structures for ris firmware described config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220126/202201261947.fXVOY521-lk...) compiler: aarch64-linux-gcc (GCC) 11.2.0 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/v5.16 git checkout 14660e9725835a4ec28fbc00f4f5f742c673383f # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/platform/mpam/ 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 >>): 277 | int mpam_ris_get_affinity(struct mpam_msc *msc, cpumask_t *affinity, | ^~~~~~~~~~~~~~~~~~~~~ 310 | int mpam_ris_create_locked(struct mpam_msc *msc, u8 ris_idx, | ^~~~~~~~~~~~~~~~~~~~~~ drivers/platform/mpam/mpam_devices.c:567:5: warning: no previous prototype for 'mpam_msc_drv_remove' [-Wmissing-prototypes] 567 | int mpam_msc_drv_remove(struct platform_device *pdev) | ^~~~~~~~~~~~~~~~~~~ vim +/mpam_ris_get_affinity +277 drivers/platform/mpam/mpam_devices.c 276 278 enum mpam_class_types type, struct mpam_class *class, 279 struct mpam_component *comp) 280 { 281 int err; 282 283 switch (type) { 284 case MPAM_CLASS_CACHE: 285 err = get_cpumask_from_cache_id(comp->comp_id, class->level, 286 affinity); 287 if (err) 288 return err; 289 290 if (cpumask_empty(affinity)) 291 pr_warn_once("%s no CPUs associated with cache node", 292 dev_name(&msc->pdev->dev)); 293 294 break; 295 case MPAM_CLASS_MEMORY: 296 *affinity = *cpumask_of_node(comp->comp_id); 297 if (cpumask_empty(affinity)) 298 pr_warn_once("%s no CPUs associated with memory node", 299 dev_name(&msc->pdev->dev)); 300 break; 301 case MPAM_CLASS_UNKNOWN: 302 return 0; 303 } 304 305 cpumask_and(affinity, affinity, &msc->accessibility); 306 307 return 0; 308 } 309 311 enum mpam_class_types type, u8 class_id, 312 int component_id, gfp_t gfp) 313 { 314 int err; 315 struct mpam_msc_ris *ris; 316 struct mpam_class *class; 317 struct mpam_component *comp; 318 319 lockdep_assert_held(&mpam_list_lock); 320 321 if (test_and_set_bit(ris_idx, msc->ris_idxs)) 322 return -EBUSY; 323 324 ris = devm_kzalloc(&msc->pdev->dev, sizeof(*ris), gfp); 325 if (!ris) 326 return -ENOMEM; 327 328 class = mpam_class_get(class_id, type, true, gfp); 329 if (IS_ERR(class)) 330 return PTR_ERR(class); 331 332 comp = mpam_component_get(class, component_id, true, gfp); 333 if (IS_ERR(comp)) { 334 if (list_empty(&class->components)) 335 mpam_class_destroy(class); 336 return PTR_ERR(comp); 337 } 338 339 err = mpam_ris_get_affinity(msc, &ris->affinity, type, class, comp); 340 if (err) { 341 if (list_empty(&class->components)) 342 mpam_class_destroy(class); 343 return err; 344 } 345 346 ris->ris_idx = ris_idx; 347 INIT_LIST_HEAD_RCU(&ris->comp_list); 348 INIT_LIST_HEAD_RCU(&ris->msc_list); 349 ris->msc = msc; 350 ris->comp = comp; 351 352 cpumask_or(&comp->affinity, &comp->affinity, &ris->affinity); 353 cpumask_or(&class->affinity, &class->affinity, &ris->affinity); 354 list_add_rcu(&ris->comp_list, &comp->ris); 355 356 return 0; 357 } 358 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org