Hi Stefan, Thank you for the patch! Yet something to improve: [auto build test ERROR on b90cb1053190353cc30f0fef0ef1f378ccc063c5] url: https://github.com/intel-lab-lkp/linux/commits/Stefan-Roesch/io-uring-btrfs-support-async-buffered-writes/20220902-070208 base: b90cb1053190353cc30f0fef0ef1f378ccc063c5 config: i386-randconfig-a003 (https://download.01.org/0day-ci/archive/20220902/202209022236.e41DKuIt-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/b24b542d1de60f99e6bfeb7971168c9a9bc8b7e4 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Stefan-Roesch/io-uring-btrfs-support-async-buffered-writes/20220902-070208 git checkout b24b542d1de60f99e6bfeb7971168c9a9bc8b7e4 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "balance_dirty_pages_ratelimited_flags" [fs/btrfs/btrfs.ko] undefined! -- 0-DAY CI Kernel Test Service https://01.org/lkp