Hi Roberto, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] [also build test ERROR on bpf/master horms-ipvs/master net/master net-next/master v5.18 next-20220525] [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-Add-support-for-maps-with-authenticated-values/20220525-212552 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-kexec (https://download.01.org/0day-ci/archive/20220526/202205260057.t4Lmg5Gb-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/196e68e5ddfa50f40efaf20c8df37f3420e38b72 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Roberto-Sassu/bpf-Add-support-for-maps-with-authenticated-values/20220525-212552 git checkout 196e68e5ddfa50f40efaf20c8df37f3420e38b72 # 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 <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): ld: kernel/bpf/syscall.o: in function `bpf_map_verify_value_sig': >> syscall.c:(.text+0x4ff): undefined reference to `mod_check_sig' -- 0-DAY CI Kernel Test Service https://01.org/lkp