Hi Gustavo, kernel test robot noticed the following build warnings: [auto build test WARNING on jack-fs/fsnotify] [also build test WARNING on linus/master v6.15-rc5 next-20250507] [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/Gustavo-A-R-Silva/fanotify-Avoid-a-couple-of-Wflex-array-member-not-at-end-warnings/20250507-074110 base: https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify patch link: https://lore.kernel.org/r/aBqdlxlBtb9s7ydc%40kspp patch subject: [PATCH][next] fanotify: Avoid a couple of -Wflex-array-member-not-at-end warnings config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20250508/202505081249.CUDWsu7Z-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250508/202505081249.CUDWsu7Z-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202505081249.CUDWsu7Z-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from fs/notify/fdinfo.c:17: >> fs/notify/fanotify/fanotify.h:280:16: warning: alignment 1 of 'union <anonymous>' is less than 4 [-Wpacked-not-aligned] 280 | struct fanotify_fh name; \ | ^~~~~~~~~~~ fs/notify/fanotify/fanotify.h:287:9: note: in expansion of macro 'FANOTIFY_INLINE_FH' 287 | FANOTIFY_INLINE_FH(object_fh, FANOTIFY_INLINE_FH_LEN); | ^~~~~~~~~~~~~~~~~~ >> fs/notify/fanotify/fanotify.h:280:16: warning: alignment 1 of 'union <anonymous>' is less than 4 [-Wpacked-not-aligned] 280 | struct fanotify_fh name; \ | ^~~~~~~~~~~ fs/notify/fanotify/fanotify.h:315:9: note: in expansion of macro 'FANOTIFY_INLINE_FH' 315 | FANOTIFY_INLINE_FH(object_fh, MAX_HANDLE_SZ); | ^~~~~~~~~~~~~~~~~~ vim +280 fs/notify/fanotify/fanotify.h b8a6c3a2f0ae4d Amir Goldstein 2020-07-08 275 2c5069433a3adc Gabriel Krisman Bertazi 2021-10-25 276 #define FANOTIFY_INLINE_FH(name, size) \ e3725b8a2ecdf6 Gustavo A. R. Silva 2025-05-06 277 union { \ e3725b8a2ecdf6 Gustavo A. R. Silva 2025-05-06 278 /* Space for object_fh and object_fh.buf[] - access with fanotify_fh_buf() */ \ e3725b8a2ecdf6 Gustavo A. R. Silva 2025-05-06 279 unsigned char _inline_fh_buf[struct_size_t(struct fanotify_fh, buf, size)]; \ 1758cd2e95d31b Alexey Dobriyan 2023-10-10 @280 struct fanotify_fh name; \ e3725b8a2ecdf6 Gustavo A. R. Silva 2025-05-06 281 } __packed 2c5069433a3adc Gabriel Krisman Bertazi 2021-10-25 282 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
