Hi Alexander, Thank you for the patch! Yet something to improve: [auto build test ERROR on fscrypt/fsverity] [also build test ERROR on linus/master v6.1-rc7 next-20221128] [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: sh-allmodconfig compiler: sh4-linux-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # 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 COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash fs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): fs/composefs/cfs.c: In function 'cfs_mmu_get_unmapped_area': >> fs/composefs/cfs.c:686:27: error: 'struct mm_struct' has no member named 'get_unmapped_area' 686 | return current->mm->get_unmapped_area(file, addr, len, pgoff, flags); | ^~ fs/composefs/cfs.c:687:1: error: control reaches end of non-void function [-Werror=return-type] 687 | } | ^ fs/composefs/cfs.c: At top level: 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; | ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +686 fs/composefs/cfs.c 0f354cef5ce30b Alexander Larsson 2022-11-28 674 0f354cef5ce30b Alexander Larsson 2022-11-28 675 static unsigned long cfs_mmu_get_unmapped_area(struct file *file, 0f354cef5ce30b Alexander Larsson 2022-11-28 676 unsigned long addr, 0f354cef5ce30b Alexander Larsson 2022-11-28 677 unsigned long len, 0f354cef5ce30b Alexander Larsson 2022-11-28 678 unsigned long pgoff, 0f354cef5ce30b Alexander Larsson 2022-11-28 679 unsigned long flags) 0f354cef5ce30b Alexander Larsson 2022-11-28 680 { 0f354cef5ce30b Alexander Larsson 2022-11-28 681 struct file *realfile = file->private_data; 0f354cef5ce30b Alexander Larsson 2022-11-28 682 0f354cef5ce30b Alexander Larsson 2022-11-28 683 if (realfile == &empty_file) 0f354cef5ce30b Alexander Larsson 2022-11-28 684 return 0; 0f354cef5ce30b Alexander Larsson 2022-11-28 685 0f354cef5ce30b Alexander Larsson 2022-11-28 @686 return current->mm->get_unmapped_area(file, addr, len, pgoff, flags); 0f354cef5ce30b Alexander Larsson 2022-11-28 687 } 0f354cef5ce30b Alexander Larsson 2022-11-28 688 -- 0-DAY CI Kernel Test Service https://01.org/lkp