[kbuild-all] drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:503:6: warning: no previous prototype for 'release_psp_cmd_buf'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8ab774587903771821b59471cc723bba6d893942 commit: 4b296527549853eae8f1f0e010eaaea511ab00d7 drm/amdgpu: added synchronization for psp cmd buf access date: 3 months ago config: arc-randconfig-r043-20210927 (attached as .config) compiler: arceb-elf-gcc (GCC) 11.2.0 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://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 4b296527549853eae8f1f0e010eaaea511ab00d7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc 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 >>): 503 | void release_psp_cmd_buf(struct psp_context *psp) | ^~~~~~~~~~~~~~~~~~~ vim +/release_psp_cmd_buf +503 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c 502 504 { 505 mutex_unlock(&psp->mutex); 506 } 507 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org