Hi Kishon,

FYI, the error/warning still remains.

tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y
head:   bf0b43568bb5b401970127e59bbbc7921cebe6d2
commit: bbd60c1753ae4cecfd562d683419ddddc184fddd [3067/6498] PCI: endpoint: Add "pci-epf-bus" driver
config: x86_64-randconfig-r002-20200531 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2388a096e7865c043e83ece4e26654bd3d1a20d5)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout bbd60c1753ae4cecfd562d683419ddddc184fddd
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/pci/endpoint/pci-epf-bus.c:36:34: warning: unused variable 'pci_epf_bus_id_table' [-Wunused-const-variable]
static const struct of_device_id pci_epf_bus_id_table[] = {
^
1 warning generated.

vim +/pci_epf_bus_id_table +36 drivers/pci/endpoint/pci-epf-bus.c

    35	
  > 36	static const struct of_device_id pci_epf_bus_id_table[] = {
    37		{ .compatible = "pci-epf-bus" },
    38		{}
    39	};
    40	MODULE_DEVICE_TABLE(of, pci_epf_bus_id_table);
    41	

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org