[kbuild-all] [andersson:wip/sm8350-next-20211118 46/51] drivers/gpu/drm/msm/dp/dp_display.c:420:6: warning: no previous prototype for function 'dp_display_oob_hotplug_event'

tree: https://github.com/andersson/kernel wip/sm8350-next-20211118 head: d4e3c3fe1bf25b7e421edef192756bee5bc1ffac commit: 6cc13d7c2d774fa5b1c7f024ce7e1c7313af4a2f [46/51] drm/msm/dp: Wire up oob callback config: hexagon-randconfig-r041-20211207 (https://download.01.org/0day-ci/archive/20211208/202112081851.ZhEZUbXt-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) 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 # https://github.com/andersson/kernel/commit/6cc13d7c2d774fa5b1c7f024ce7e1c... git remote add andersson https://github.com/andersson/kernel git fetch --no-tags andersson wip/sm8350-next-20211118 git checkout 6cc13d7c2d774fa5b1c7f024ce7e1c7313af4a2f # 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=hexagon SHELL=/bin/bash drivers/gpu/drm/msm/ 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 >>): void dp_display_oob_hotplug_event(struct msm_dp *dp_display) ^ drivers/gpu/drm/msm/dp/dp_display.c:420:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void dp_display_oob_hotplug_event(struct msm_dp *dp_display) ^ static 1 warning generated. vim +/dp_display_oob_hotplug_event +420 drivers/gpu/drm/msm/dp/dp_display.c 419 421 { 422 struct dp_display_private *dp; 423 static bool current_state; 424 425 dp = container_of(dp_display, struct dp_display_private, dp_display); 426 427 printk(KERN_ERR "=================================== %s() hpd_state: %d current_state: %d\n", __func__, dp->hpd_state, current_state); 428 429 if (!current_state) { 430 dp_display_host_init(dp, false); 431 dp_display_process_hpd_high(dp); 432 } else { 433 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); 434 } 435 436 current_state = !current_state; 437 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org