Hi Petr, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on rafael-pm/linux-next] [also build test WARNING on linus/master v6.2 next-20230301] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Petr-Pavlu/ACPI-cpufreq-use-a-platform-device-to-load-ACPI-PPC-and-PCC-drivers/20230301-165927 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next patch link: https://lore.kernel.org/r/20230301085717.10411-1-petr.pavlu%40suse.com patch subject: [PATCH v3] ACPI: cpufreq: use a platform device to load ACPI PPC and PCC drivers config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230302/202303020759.pwVPib0p-lkp@xxxxxxxxx/config) compiler: ia64-linux-gcc (GCC) 12.1.0 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://github.com/intel-lab-lkp/linux/commit/59eb26f9b02165cc5c5fb6514ff4d2a8d7a91356 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Petr-Pavlu/ACPI-cpufreq-use-a-platform-device-to-load-ACPI-PPC-and-PCC-drivers/20230301-165927 git checkout 59eb26f9b02165cc5c5fb6514ff4d2a8d7a91356 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303020759.pwVPib0p-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/acpi/acpi_processor.c:177:13: warning: no previous prototype for 'acpi_pcc_cpufreq_init' [-Wmissing-prototypes] 177 | void __init acpi_pcc_cpufreq_init(void) {} | ^~~~~~~~~~~~~~~~~~~~~ vim +/acpi_pcc_cpufreq_init +177 drivers/acpi/acpi_processor.c 162 163 #ifdef CONFIG_X86 164 /* Check presence of Processor Clocking Control by searching for \_SB.PCCH. */ 165 void __init acpi_pcc_cpufreq_init(void) 166 { 167 acpi_status status; 168 acpi_handle handle; 169 170 status = acpi_get_handle(NULL, "\\_SB", &handle); 171 if (ACPI_FAILURE(status)) 172 return; 173 if (acpi_has_method(handle, "PCCH")) 174 cpufreq_add_device("pcc-cpufreq"); 175 } 176 #else > 177 void __init acpi_pcc_cpufreq_init(void) {} 178 #endif /* CONFIG_X86 */ 179 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests