tree: https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x8... review-hans head: fc3341b4b55f46ad0846a22ae149d94bac6ce40b commit: 76f7eba3e0a248af4cc4f302d95031fa2fb65fab [77/100] platform/x86: system76_acpi: Add battery charging thresholds config: i386-randconfig-a002-20211020 (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/pdx86/platform-drivers-x8... git remote add pdx86-platform-drivers-x86 https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x8... git fetch --no-tags pdx86-platform-drivers-x86 review-hans git checkout 76f7eba3e0a248af4cc4f302d95031fa2fb65fab # save the attached .config to linux build tree mkdir build_dir make 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(a)intel.com&gt; Note: the pdx86-platform-drivers-x86/review-hans HEAD fc3341b4b55f46ad0846a22ae149d94bac6ce40b builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): ld: drivers/platform/x86/system76_acpi.o: in function `system76_battery_exit': ld: drivers/platform/x86/system76_acpi.o: in function `system76_battery_init': vim +295 drivers/platform/x86/system76_acpi.c 279 280 static void system76_battery_init(void) 281 { 282 acpi_handle handle; 283 284 handle = ec_get_handle(); 285 if (handle && acpi_has_method(handle, "GBCT")) 287 } 288 289 static void system76_battery_exit(void) 290 { 291 acpi_handle handle; 292 293 handle = ec_get_handle(); 294 if (handle && acpi_has_method(handle, "GBCT")) 296 } 297 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org