Hi Daniele, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-tip/drm-tip] url: https://github.com/intel-lab-lkp/linux/commits/Daniele-Ceraolo-Spurio/drm-i915-gsc-fixes-and-updates-for-GSC-memory-allocation/20230606-102510 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip patch link: https://lore.kernel.org/r/20230606022402.2048235-5-daniele.ceraolospurio%40intel.com patch subject: [PATCH v2 4/5] drm/i915/mtl/gsc: Add a gsc_info debugfs config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20230606/202306061441.HlzHQi07-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): git remote add drm-tip git://anongit.freedesktop.org/drm/drm-tip git fetch drm-tip drm-tip git checkout drm-tip/drm-tip b4 shazam https://lore.kernel.org/r/20230606022402.2048235-5-daniele.ceraolospurio@xxxxxxxxx # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202306061441.HlzHQi07-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_debugfs.c:28:6: warning: no previous prototype for 'intel_gsc_uc_debugfs_register' [-Wmissing-prototypes] 28 | void intel_gsc_uc_debugfs_register(struct intel_gsc_uc *gsc_uc, struct dentry *root) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/intel_gsc_uc_debugfs_register +28 drivers/gpu/drm/i915/gt/uc/intel_gsc_uc_debugfs.c 27 > 28 void intel_gsc_uc_debugfs_register(struct intel_gsc_uc *gsc_uc, struct dentry *root) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
