Hi Stefan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on f1baf68e1383f6ed93eb9cff2866d46562607a43] url: https://github.com/0day-ci/linux/commits/Stefan-Roesch/Support-sync-buffe... base: f1baf68e1383f6ed93eb9cff2866d46562607a43 config: i386-randconfig-s002-20220214 (https://download.01.org/0day-ci/archive/20220215/202202151030.Z3rVrN17-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/e8b24c1ab111c127cbe1daaac3b607c62... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stefan-Roesch/Support-sync-buffered-writes-for-io-uring/20220215-014908 git checkout e8b24c1ab111c127cbe1daaac3b607c626fb03a8 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org