Hi Florent, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Florent-Revest/Add-a-snprintf-eBPF-helper/20210412-233921 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: mips-decstation_r4k_defconfig (attached as .config) compiler: mipsel-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/168301dda58989eca274d5f5c926675540010e13 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Florent-Revest/Add-a-snprintf-eBPF-helper/20210412-233921 git checkout 168301dda58989eca274d5f5c926675540010e13 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): mipsel-linux-ld: kernel/bpf/verifier.o: in function `check_helper_call.isra.0': verifier.c:(.text+0x13bac): undefined reference to `bpf_printf_prepare' mipsel-linux-ld: kernel/bpf/helpers.o: in function `bpf_base_func_proto': helpers.c:(.text+0x9c8): undefined reference to `bpf_snprintf_proto' >> mipsel-linux-ld: helpers.c:(.text+0x9d0): undefined reference to `bpf_snprintf_proto' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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