Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on rafael-pm/linux-next] [also build test WARNING on v5.17 next-20220401] [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/james-liu-hpe-com/ACPI-OSL-Fix-the-memory-mapping-of-an-ACPI-GAS-that-addresses-a-data-structure/20220402-013755 base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next config: x86_64-randconfig-a012 (https://download.01.org/0day-ci/archive/20220402/202204021406.lxRmdIm5-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c4a1b07d0979e7ff20d7d541af666d822d66b566) 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/594496ff7d62c6d42b3c8a436fca46cc289aea67 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review james-liu-hpe-com/ACPI-OSL-Fix-the-memory-mapping-of-an-ACPI-GAS-that-addresses-a-data-structure/20220402-013755 git checkout 594496ff7d62c6d42b3c8a436fca46cc289aea67 # 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=x86_64 SHELL=/bin/bash drivers/acpi/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/acpi/osl.c:463:29: warning: variable 'addr' is uninitialized when used here [-Wuninitialized] return acpi_os_map_iomem(addr, PAGE_SIZE); ^~~~ drivers/acpi/osl.c:455:10: note: initialize the variable 'addr' to silence this warning u64 addr; ^ = 0 drivers/acpi/osl.c:487:25: warning: variable 'addr' is uninitialized when used here [-Wuninitialized] map = acpi_map_lookup(addr, PAGE_SIZE); ^~~~ drivers/acpi/osl.c:477:10: note: initialize the variable 'addr' to silence this warning u64 addr; ^ = 0 2 warnings generated. vim +/addr +463 drivers/acpi/osl.c 452 453 void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *gas) 454 { 455 u64 addr; 456 457 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) 458 return NULL; 459 460 /* Handle a case that GAS is used to address an ACPI data structure */ 461 if (!gas->bit_width) { 462 pr_info("An ACPI data structure at 0x%llx is mapped\n", addr); > 463 return acpi_os_map_iomem(addr, PAGE_SIZE); 464 } 465 466 /* Handle possible alignment issues */ 467 memcpy(&addr, &gas->address, sizeof(addr)); 468 if (!addr) 469 return NULL; 470 471 return acpi_os_map_iomem(addr, gas->bit_width / 8); 472 } 473 EXPORT_SYMBOL(acpi_os_map_generic_address); 474 -- 0-DAY CI Kernel Test Service https://01.org/lkp
