tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next head: fb5e487f910e1105019b883e8ed25e36e4bfd657 commit: 7a4fad619819f62fad155d11e602ee3093f75d2c [41/66] drm/amdgpu: Remove ATC L2 access for MMHUB 2.1.x config: s390-randconfig-r024-20221019 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f drm-next git checkout 7a4fad619819f62fad155d11e602ee3093f75d2c # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:52: In file included from include/linux/pci.h:39: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:52: In file included from include/linux/pci.h:39: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:52: In file included from include/linux/pci.h:39: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c:686:3: warning: variable 'data' is uninitialized when used here [-Wuninitialized] data |= MM_ATC_L2_MISC_CG__ENABLE_MASK; ^~~~ drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c:674:10: note: initialize the variable 'data' to silence this warning int data, data1; ^ = 0 13 warnings generated. vim +/data +686 drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c 671 672 static void mmhub_v2_0_get_clockgating(struct amdgpu_device *adev, u64 *flags) 673 { 674 int data, data1; 675 676 if (amdgpu_sriov_vf(adev)) 677 *flags = 0; 678 679 switch (adev->ip_versions[MMHUB_HWIP][0]) { 680 case IP_VERSION(2, 1, 0): 681 case IP_VERSION(2, 1, 1): 682 case IP_VERSION(2, 1, 2): 683 /* There is no ATCL2 in MMHUB for 2.1.x. Keep the status 684 * based on DAGB 685 */ > 686 data |= MM_ATC_L2_MISC_CG__ENABLE_MASK; 687 data1 = RREG32_SOC15(MMHUB, 0, mmDAGB0_CNTL_MISC2_Sienna_Cichlid); 688 break; 689 default: 690 data = RREG32_SOC15(MMHUB, 0, mmMM_ATC_L2_MISC_CG); 691 data1 = RREG32_SOC15(MMHUB, 0, mmDAGB0_CNTL_MISC2); 692 break; 693 } 694 695 /* AMD_CG_SUPPORT_MC_MGCG */ 696 if ((data & MM_ATC_L2_MISC_CG__ENABLE_MASK) && 697 !(data1 & (DAGB0_CNTL_MISC2__DISABLE_WRREQ_CG_MASK | 698 DAGB0_CNTL_MISC2__DISABLE_WRRET_CG_MASK | 699 DAGB0_CNTL_MISC2__DISABLE_RDREQ_CG_MASK | 700 DAGB0_CNTL_MISC2__DISABLE_RDRET_CG_MASK | 701 DAGB0_CNTL_MISC2__DISABLE_TLBWR_CG_MASK | 702 DAGB0_CNTL_MISC2__DISABLE_TLBRD_CG_MASK))) 703 *flags |= AMD_CG_SUPPORT_MC_MGCG; 704 705 /* AMD_CG_SUPPORT_MC_LS */ 706 if (data & MM_ATC_L2_MISC_CG__MEM_LS_ENABLE_MASK) 707 *flags |= AMD_CG_SUPPORT_MC_LS; 708 } 709 -- 0-DAY CI Kernel Test Service https://01.org/lkp