Hi Alexander, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on fscrypt/fsverity] [also build test WARNING on linus/master v6.1-rc7 next-20221129] [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/Alexander-Larsson/Composefs-an-opportunistically-sharing-verified-image-filesystem/20221128-192140 base: https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git fsverity patch link: https://lore.kernel.org/r/a0524f492d2ac64b99f3de6ea2b27249a4bcadad.1669631086.git.alexl%40redhat.com patch subject: [PATCH 6/6] composefs: Add kconfig and build support config: x86_64-allyesconfig 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/b1d98075a6a519fa9405dd2cd273ed2e00f12266 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Alexander-Larsson/Composefs-an-opportunistically-sharing-verified-image-filesystem/20221128-192140 git checkout b1d98075a6a519fa9405dd2cd273ed2e00f12266 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/composefs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> fs/composefs/cfs.c:58:42: warning: 'generic_file_vm_ops' defined but not used [-Wunused-const-variable=] 58 | static const struct vm_operations_struct generic_file_vm_ops; | ^~~~~~~~~~~~~~~~~~~ vim +/generic_file_vm_ops +58 fs/composefs/cfs.c 0f354cef5ce30b9 Alexander Larsson 2022-11-28 56 0f354cef5ce30b9 Alexander Larsson 2022-11-28 57 static const struct file_operations cfs_file_operations; 0f354cef5ce30b9 Alexander Larsson 2022-11-28 @58 static const struct vm_operations_struct generic_file_vm_ops; 0f354cef5ce30b9 Alexander Larsson 2022-11-28 59 -- 0-DAY CI Kernel Test Service https://01.org/lkp