tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 483fed3b5dc8ce3644c83d24240cf5756fb0993e commit: 9c75891feef0f9f67cf1c8f8038371006e25d23f [8021/8813] drm/amd/display: rework recent update PHY state commit config: powerpc-randconfig-r006-20220921 (https://download.01.org/0day-ci/archive/20220922/202209220019.Yr2VuXhg-lkp@xxxxxxxxx/config) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=9c75891feef0f9f67cf1c8f8038371006e25d23f git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 9c75891feef0f9f67cf1c8f8038371006e25d23f # 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=powerpc SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/amd/amdgpu/../display/dc/virtual/virtual_link_hwss.c:40:6: warning: no previous prototype for function 'virtual_disable_link_output' [-Wmissing-prototypes] void virtual_disable_link_output(struct dc_link *link, ^ drivers/gpu/drm/amd/amdgpu/../display/dc/virtual/virtual_link_hwss.c:40:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void virtual_disable_link_output(struct dc_link *link, ^ static 1 warning generated. vim +/virtual_disable_link_output +40 drivers/gpu/drm/amd/amdgpu/../display/dc/virtual/virtual_link_hwss.c 39 > 40 void virtual_disable_link_output(struct dc_link *link, 41 const struct link_resource *link_res, 42 enum signal_type signal) 43 { 44 } 45 -- 0-DAY CI Kernel Test Service https://01.org/lkp