tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0 commit: 87c71931633bd15e9cfd51d4a4d9cd685e8cdb55 Merge branch 'pci/driver-cleanup' date: 11 days ago config: mips-randconfig-r031-20220124 (https://download.01.org/0day-ci/archive/20220124/202201241754.igtHzgHv-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 87c71931633bd15e9cfd51d4a4d9cd685e8cdb55 # 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=mips SHELL=/bin/bash drivers/pci/controller/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/pci/controller/pcie-mt7621.c:112:20: warning: unused function 'pcie_rmw' [-Wunused-function] static inline void pcie_rmw(struct mt7621_pcie *pcie, u32 reg, u32 clr, u32 set) ^ static const struct of_device_id mt7621_pcie_ids[] = { ^ 2 warnings generated. vim +/mt7621_pcie_ids +549 drivers/pci/controller/pcie-mt7621.c 03f152e31f4ae89 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 548 4793895f597d42e drivers/pci/controller/pcie-mt7621.c Bjorn Helgaas 2021-12-22 @549 static const struct of_device_id mt7621_pcie_ids[] = { 03f152e31f4ae89 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 550 { .compatible = "mediatek,mt7621-pci" }, 03f152e31f4ae89 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 551 {}, 03f152e31f4ae89 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 552 }; 4793895f597d42e drivers/pci/controller/pcie-mt7621.c Bjorn Helgaas 2021-12-22 553 MODULE_DEVICE_TABLE(of, mt7621_pcie_ids); 03f152e31f4ae89 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 554 :::::: The code at line 549 was first introduced by commit :::::: 4793895f597d42eb54a0f54711b61263b6a8dd03 PCI: mt7621: Rename mt7621_pci_ to mt7621_pcie_ :::::: TO: Bjorn Helgaas <bhelgaas(a)google.com&gt; :::::: CC: Bjorn Helgaas <bhelgaas(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org