[kbuild-all] Re: [PATCH v2] drm: avoid races with modesetting rights

Hi Desmond, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on next-20210813] [also build test WARNING on v5.14-rc5] [cannot apply to linus/master v5.14-rc5 v5.14-rc4 v5.14-rc3] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Desmond-Cheong-Zhi-Xi/drm-avoid-... base: 4b358aabb93a2c654cd1dcab1a25a589f6e2b153 config: arc-randconfig-r031-20210815 (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://github.com/0day-ci/linux/commit/cf6d8354b7d7953cd866fad004cbb189a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Desmond-Cheong-Zhi-Xi/drm-avoid-races-with-modesetting-rights/20210815-234145 git checkout cf6d8354b7d7953cd866fad004cbb189adfa074f # 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 >>): >> drivers/gpu/drm/drm_auth.c:483:6: warning: no previous prototype for 'master_flush' [-Wmissing-prototypes] 483 | void master_flush(struct callback_head *cb) | ^~~~~~~~~~~~

vim +/master_flush +483 drivers/gpu/drm/drm_auth.c 479 480 /* After flushing, all readers that might have seen old master/lease 481 * permissions are guaranteed to have completed. 482 */ > 483 void master_flush(struct callback_head *cb) 484 { 485 struct drm_device *dev = container_of(cb, struct drm_device, 486 master_flush_work); 487 488 down_write(&dev->master_rwsem); 489 up_write(&dev->master_rwsem); 490 } 491 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org