Hi "Rafael, Thank you for the patch! Yet something to improve: [auto build test ERROR on rafael-pm/linux-next] [also build test ERROR on linus/master linux/master v5.18-rc2 next-20220411] [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] url: https://github.com/intel-lab-lkp/linux/commits/Rafael-J-Wysocki/ACPICA-ACPICA-20220331/20220412-030922 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: i386-randconfig-a006-20220411 (https://download.01.org/0day-ci/archive/20220412/202204121322.P9yX0gKP-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project fe2478d44e4f7f191c43fef629ac7a23d0251e72) 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/22c298d3a077e7ea8503e9acf7ac83e6b1e10148 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Rafael-J-Wysocki/ACPICA-ACPICA-20220331/20220412-030922 git checkout 22c298d3a077e7ea8503e9acf7ac83e6b1e10148 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-review/Rafael-J-Wysocki/ACPICA-ACPICA-20220331/20220412-030922 HEAD 32181ae3d3173aeee41f709612dfa4d52951b39d builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): drivers/acpi/acpica/exsystem.c:140:7: error: use of undeclared identifier 'how_long_US'; did you mean 'how_long_us'? if (how_long_US > 100) { ^~~~~~~~~~~ how_long_us drivers/acpi/acpica/exsystem.c:123:41: note: 'how_long_us' declared here acpi_status acpi_ex_system_do_stall(u32 how_long_us) ^ >> drivers/acpi/acpica/exsystem.c:179:10: error: use of undeclared identifier 'how_long_us'; did you mean 'how_long_ms'? how_long_us)); ^~~~~~~~~~~ how_long_ms include/acpi/acoutput.h:203:54: note: expanded from macro 'ACPI_WARNING' #define ACPI_WARNING(plist) acpi_warning plist ^ drivers/acpi/acpica/exsystem.c:164:41: note: 'how_long_ms' declared here acpi_status acpi_ex_system_do_sleep(u64 how_long_ms) ^ 2 errors generated. vim +179 drivers/acpi/acpica/exsystem.c 150 151 /******************************************************************************* 152 * 153 * FUNCTION: acpi_ex_system_do_sleep 154 * 155 * PARAMETERS: how_long_ms - The amount of time to sleep, 156 * in milliseconds 157 * 158 * RETURN: None 159 * 160 * DESCRIPTION: Sleep the running thread for specified amount of time. 161 * 162 ******************************************************************************/ 163 164 acpi_status acpi_ex_system_do_sleep(u64 how_long_ms) 165 { 166 ACPI_FUNCTION_ENTRY(); 167 168 /* Since this thread will sleep, we must release the interpreter */ 169 170 acpi_ex_exit_interpreter(); 171 172 /* 173 * Warn users about excessive sleep times, so ASL code can be improved to 174 * use polling or similar techniques. 175 */ 176 if (how_long_ms > 10) { 177 ACPI_WARNING((AE_INFO, 178 "Firmware issue: Excessive sleep time (%llu ms > 10 ms) in ACPI Control Method", > 179 how_long_us)); 180 } 181 182 /* 183 * For compatibility with other ACPI implementations and to prevent 184 * accidental deep sleeps, limit the sleep time to something reasonable. 185 */ 186 if (how_long_ms > ACPI_MAX_SLEEP) { 187 how_long_ms = ACPI_MAX_SLEEP; 188 } 189 190 acpi_os_sleep(how_long_ms); 191 192 /* And now we must get the interpreter again */ 193 194 acpi_ex_enter_interpreter(); 195 return (AE_OK); 196 } 197 -- 0-DAY CI Kernel Test Service https://01.org/lkp