tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next head: f5bb65b1b6213c07641c5e60c67fbcbb438705bc commit: 908dada12cbe41ab5a218a8157631df48bded32b [41/57] drm/amdgpu: added synchronization for psp cmd buf access config: i386-randconfig-r021-20210804 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f drm-next git checkout 908dada12cbe41ab5a218a8157631df48bded32b # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:503:6: warning: no previous prototype for 'release_psp_cmd_buf' [-Wmissing-prototypes] 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 > 503 void release_psp_cmd_buf(struct psp_context *psp) 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