Hi Evan, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 1c86f90a16d413621918ae1403842b43632f0b3d commit: a90e6fbe47ff6707a57e55aa578e623b10f79b10 [2048/2270] drm/amd/pm: correct the settings for ro range minimum and maximum config: arm64-randconfig-r004-20201028 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 50dfa19cc799ae7cddd39a95dbfce675a12672ad) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a90e6fbe47ff6707a57e55aa578e623b10f79b10 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout a90e6fbe47ff6707a57e55aa578e623b10f79b10 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1743:13: warning: variable 'min' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] } else if ((hwmgr->chip_id == CHIP_POLARIS11) || ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1749:27: note: uninitialized use occurs here data->ro_range_minimum = min; ^~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1743:9: note: remove the 'if' if its condition is always true } else if ((hwmgr->chip_id == CHIP_POLARIS11) || ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1738:15: warning: variable 'min' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] } else if (evv_revision == 2) { ^~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1749:27: note: uninitialized use occurs here data->ro_range_minimum = min; ^~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1738:11: note: remove the 'if' if its condition is always true } else if (evv_revision == 2) { ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1706:43: note: initialize the variable 'min' to silence this warning uint32_t asicrev1, evv_revision, max, min; ^ = 0 >> drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1743:13: warning: variable 'max' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] } else if ((hwmgr->chip_id == CHIP_POLARIS11) || ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1750:27: note: uninitialized use occurs here data->ro_range_maximum = max; ^~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1743:9: note: remove the 'if' if its condition is always true } else if ((hwmgr->chip_id == CHIP_POLARIS11) || ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1738:15: warning: variable 'max' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] } else if (evv_revision == 2) { ^~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1750:27: note: uninitialized use occurs here data->ro_range_maximum = max; ^~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1738:11: note: remove the 'if' if its condition is always true } else if (evv_revision == 2) { ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:1706:38: note: initialize the variable 'max' to silence this warning uint32_t asicrev1, evv_revision, max, min; ^ = 0 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:5286:5: warning: no previous prototype for function 'smu7_init_function_pointers' [-Wmissing-prototypes] int smu7_init_function_pointers(struct pp_hwmgr *hwmgr) ^ drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c:5286:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int smu7_init_function_pointers(struct pp_hwmgr *hwmgr) ^ static 5 warnings generated. vim +1743 drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu7_hwmgr.c 1701 1702 static int smu7_calculate_ro_range(struct pp_hwmgr *hwmgr) 1703 { 1704 struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend); 1705 struct amdgpu_device *adev = hwmgr->adev; 1706 uint32_t asicrev1, evv_revision, max, min; 1707 1708 atomctrl_read_efuse(hwmgr, STRAP_EVV_REVISION_LSB, STRAP_EVV_REVISION_MSB, 1709 &evv_revision); 1710 1711 atomctrl_read_efuse(hwmgr, 568, 579, &asicrev1); 1712 1713 if (ASICID_IS_P20(adev->pdev->device, adev->pdev->revision) || 1714 ASICID_IS_P30(adev->pdev->device, adev->pdev->revision)) { 1715 min = 1200; 1716 max = 2500; 1717 } else if (ASICID_IS_P21(adev->pdev->device, adev->pdev->revision) || 1718 ASICID_IS_P31(adev->pdev->device, adev->pdev->revision)) { 1719 min = 900; 1720 max= 2100; 1721 } else if (hwmgr->chip_id == CHIP_POLARIS10) { 1722 if (adev->pdev->subsystem_vendor == 0x106B) { 1723 min = 1000; 1724 max = 2300; 1725 } else { 1726 if (evv_revision == 0) { 1727 min = 1000; 1728 max = 2300; 1729 } else if (evv_revision == 1) { 1730 if (asicrev1 == 326) { 1731 min = 1200; 1732 max = 2500; 1733 /* TODO: PATCH RO in VBIOS */ 1734 } else { 1735 min = 1200; 1736 max = 2000; 1737 } 1738 } else if (evv_revision == 2) { 1739 min = 1200; 1740 max = 2500; 1741 } 1742 } > 1743 } else if ((hwmgr->chip_id == CHIP_POLARIS11) || 1744 (hwmgr->chip_id == CHIP_POLARIS12)) { 1745 min = 1100; 1746 max = 2100; 1747 } 1748 1749 data->ro_range_minimum = min; 1750 data->ro_range_maximum = max; 1751 1752 /* TODO: PATCH RO in VBIOS here */ 1753 1754 return 0; 1755 } 1756 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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