tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-linux-5.4.y head: 2bdb7c08718889073030390a1662111cd93df3fa commit: 2bdb7c08718889073030390a1662111cd93df3fa [1/1] Merge tag 'v5.4.54' of http://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable into ti-linux-5.4.y config: arm64-randconfig-r006-20201210 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344) 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 git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-linux-5.4.y git checkout 2bdb7c08718889073030390a1662111cd93df3fa # 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(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/bridge/cdns-mhdp-core.c:39: { ^ 1 error generated. -- void ks_pcie_irq_eoi(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:352:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_eoi(struct irq_data *data) ^ static void ks_pcie_irq_enable(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:361:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_enable(struct irq_data *data) ^ static void ks_pcie_irq_disable(struct irq_data *data) ^ drivers/pci/controller/dwc/pci-keystone.c:370:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void ks_pcie_irq_disable(struct irq_data *data) ^ static 3 warnings generated. vim +46 drivers/gpu/drm/bridge/cdns-mhdp-j721e.h 027933539b12d9 Yuti Amonkar 2020-02-06 43 027933539b12d9 Yuti Amonkar 2020-02-06 44 static inline 027933539b12d9 Yuti Amonkar 2020-02-06 45 void cdns_mhdp_j721e_sst_enable(struct cdns_mhdp_device *mhdp); 027933539b12d9 Yuti Amonkar 2020-02-06 @46 { 027933539b12d9 Yuti Amonkar 2020-02-06 47 } 027933539b12d9 Yuti Amonkar 2020-02-06 48 :::::: The code at line 46 was first introduced by commit :::::: 027933539b12d9948f86bed77cb17767db19b343 drm: bridge: cdns-mhdp: add j721e wrapper :::::: TO: Yuti Amonkar <yamonkar(a)cadence.com&gt; :::::: CC: Jyri Sarha <jsarha(a)ti.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org