tree: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/resctrl_merge_cdp/v1 head: e0c1639ccf91b5ccc7aeb559fcf403c60309d895 commit: fcba0fa2171682e1b8cf6a1cfdddc0c5e68c322a [16/24] x86/resctrl: Add a helper to read/set the CDP configuration config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # 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/v1 git checkout fcba0fa2171682e1b8cf6a1cfdddc0c5e68c322a # save the attached .config to linux build tree make 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 >>): arch/x86/kernel/cpu/resctrl/rdtgroup.c: In function 'rdt_last_cmd_printf': arch/x86/kernel/cpu/resctrl/rdtgroup.c:77:2: warning: function 'rdt_last_cmd_printf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 77 | seq_buf_vprintf(&last_cmd_status, fmt, ap); | ^~~~~~~~~~~~~~~ arch/x86/kernel/cpu/resctrl/rdtgroup.c: At top level: 2022 | int resctrl_arch_set_cdp_enabled(enum resctrl_res_level l, bool enable) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/resctrl_arch_set_cdp_enabled +2022 arch/x86/kernel/cpu/resctrl/rdtgroup.c 2021 2023 { 2024 struct rdt_hw_resource *hw_res = &rdt_resources_all[l]; 2025 enum resctrl_res_level code_type, data_type; 2026 2027 if (!hw_res->cdp_capable) 2028 return -EINVAL; 2029 2030 if (l == RDT_RESOURCE_L3) { 2031 code_type = RDT_RESOURCE_L3CODE; 2032 data_type = RDT_RESOURCE_L3DATA; 2033 } else if (l == RDT_RESOURCE_L2) { 2034 code_type = RDT_RESOURCE_L2CODE; 2035 data_type = RDT_RESOURCE_L2DATA; 2036 } else { 2037 return -EINVAL; 2038 } 2039 2040 if (enable) 2041 return cdp_enable(l, data_type, code_type); 2042 2043 cdp_disable(l, data_type, code_type); 2044 2045 return 0; 2046 } 2047 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org