Hi Roberto, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] [also build test ERROR on linus/master next-20220328] [cannot apply to bpf/master v5.17] [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] url: https://github.com/intel-lab-lkp/linux/commits/Roberto-Sassu/bpf-Secure-and-authenticated-preloading-of-eBPF-programs/20220329-015829 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: i386-randconfig-c001 (https://download.01.org/0day-ci/archive/20220329/202203291042.8dll5BFm-lkp@xxxxxxxxx/config) compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/2e0e81b0296abc384efb2a73520ce03c2a5344ea git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Roberto-Sassu/bpf-Secure-and-authenticated-preloading-of-eBPF-programs/20220329-015829 git checkout 2e0e81b0296abc384efb2a73520ce03c2a5344ea # save the config file to linux build tree mkdir build_dir make W=1 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@xxxxxxxxx> All errors (new ones prefixed by >>): >> kernel/bpf/inode.c:25:37: error: 'CONFIG_BPF_PRELOAD_LIST' undeclared here (not in a function) 25 | static char *bpf_preload_list_str = CONFIG_BPF_PRELOAD_LIST; | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/CONFIG_BPF_PRELOAD_LIST +25 kernel/bpf/inode.c 24 > 25 static char *bpf_preload_list_str = CONFIG_BPF_PRELOAD_LIST; 26 -- 0-DAY CI Kernel Test Service https://01.org/lkp