tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.12.y head: 6c1612b7930018e618fc920494f1982130d24d5b commit: 477c43592fb66d01619c73df004b64b95bf7f52d [232/1084] selftests/resctrl: Use resctrl/info for feature detection config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.12.y git checkout 477c43592fb66d01619c73df004b64b95bf7f52d # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash -C tools/testing/selftests/resctrl install If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): resctrlfs.c: In function 'validate_resctrl_feature_request': 641 | !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) { | ^~~~~~~ | CAT_STR resctrlfs.c:641:28: note: each undeclared identifier is reported only once for each function it appears in -- /usr/bin/ld: /tmp/ccCN2nw1.o: warning: relocation against `tests_run' in read-only section `.text.startup' /usr/bin/ld: /tmp/ccCN2nw1.o: in function `detect_amd': /usr/bin/ld: /tmp/ccCN2nw1.o: in function `tests_cleanup': /usr/bin/ld: /tmp/ccCN2nw1.o: in function `main': /usr/bin/ld: /tmp/ccCN2nw1.o: in function `printf': /usr/bin/ld: /tmp/ccCN2nw1.o: in function `main': >> /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:165: undefined reference to `mbm_bw_change' >> /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:167: undefined reference to `mbm_test_cleanup' >> /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:168: undefined reference to `tests_run' >> /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:193: undefined reference to `cat_perf_miss_val' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:195: undefined reference to `tests_run' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:196: undefined reference to `cat_test_cleanup' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:187: undefined reference to `cqm_test_cleanup' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:188: undefined reference to `tests_run' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:177: undefined reference to `mba_test_cleanup' /usr/bin/ld: tools/testing/selftests/resctrl/resctrl_tests.c:178: undefined reference to `tests_run' /usr/bin/ld: warning: creating DT_TEXTREL in a PIE collect2: error: ld returned 1 exit status --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org