Hi "Christian, I love your patch! Perhaps something to improve: [auto build test WARNING on pci/next] [also build test WARNING on linus/master v5.11-rc2 next-20210104] [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/0day-ci/linux/commits/Christian-K-nig/pci-export-pci_rebar_get_possible_sizes/20210105-224446 base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: arm64-randconfig-r006-20210105 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5c951623bc8965fa1e89660f2f5f4a2944e4981a) 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://github.com/0day-ci/linux/commit/6838a45fc2394ec88455e1fb3998ac865a077168 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christian-K-nig/pci-export-pci_rebar_get_possible_sizes/20210105-224446 git checkout 6838a45fc2394ec88455e1fb3998ac865a077168 # 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/pci/pci.c:3611:7: warning: equality comparison result unused [-Wunused-comparison] cap == 0x7f00; ~~~~^~~~~~~~~ drivers/pci/pci.c:3611:7: note: use '=' to turn this equality comparison into an assignment cap == 0x7f00; ^~ = 1 warning generated. vim +3611 drivers/pci/pci.c 3587 3588 /** 3589 * pci_rebar_get_possible_sizes - get possible sizes for BAR 3590 * @pdev: PCI device 3591 * @bar: BAR to query 3592 * 3593 * Get the possible sizes of a resizable BAR as bitmask defined in the spec 3594 * (bit 0=1MB, bit 19=512GB). Returns 0 if BAR isn't resizable. 3595 */ 3596 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar) 3597 { 3598 int pos; 3599 u32 cap; 3600 3601 pos = pci_rebar_find_pos(pdev, bar); 3602 if (pos < 0) 3603 return 0; 3604 3605 pci_read_config_dword(pdev, pos + PCI_REBAR_CAP, &cap); 3606 cap = (cap & PCI_REBAR_CAP_SIZES) >> 4; 3607 3608 /* Sapphire RX 5600 XT Pulse has an invalid cap dword for BAR 0 */ 3609 if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x731f && 3610 bar == 0 && cap == 0x700) > 3611 cap == 0x7f00; 3612 3613 return cap; 3614 } 3615 EXPORT_SYMBOL(pci_rebar_get_possible_sizes); 3616 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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