Hi Sergei, Thank you for the patch! Yet something to improve: [auto build test ERROR on axboe-block/for-next] [also build test ERROR on linus/master v6.1-rc3 next-20221102] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Sergei-Shtepa/blksnap-creating-non-persistent-snapshots-for-backup/20221103-004434 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next patch link: https://lore.kernel.org/r/20221102155101.4550-3-sergei.shtepa%40veeam.com patch subject: [PATCH v1 02/17] block, blksnap: header file of the module interface config: x86_64-randconfig-a015 compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/19bc51d2360933a4f1712270c90d956fabec5297 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Sergei-Shtepa/blksnap-creating-non-persistent-snapshots-for-backup/20221103-004434 git checkout 19bc51d2360933a4f1712270c90d956fabec5297 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from : >> ./usr/include/linux/blksnap.h:428:9: error: expected declaration specifiers or '...' before 'sizeof' 428 | sizeof(struct blk_snap_snapshot_event) == 4096, | ^~~~~~ >> ./usr/include/linux/blksnap.h:429:9: error: expected declaration specifiers or '...' before string constant 429 | "The size struct blk_snap_snapshot_event should be equal to the size of the page."); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- 0-DAY CI Kernel Test Service https://01.org/lkp