On Fri, Apr 08, 2022 at 11:53:47PM +0800, kernel test robot wrote: > Hi Stanislav, > > Thank you for the patch! Yet something to improve: > > [auto build test ERROR on bpf-next/master] > > url: https://github.com/intel-lab-lkp/linux/commits/Stanislav-Fomichev/bpf-cgroup_sock-lsm-flavor/20220408-063705 > base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master > config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20220408/202204082305.Qs2g5Dzf-lkp@xxxxxxxxx/config) > compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c29a51b3a257908aebc01cd7c4655665db317d66) > 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/3c3f15b5422ca616e2585d699c47aa4e7b7dcf1d > git remote add linux-review https://github.com/intel-lab-lkp/linux > git fetch --no-tags linux-review Stanislav-Fomichev/bpf-cgroup_sock-lsm-flavor/20220408-063705 > git checkout 3c3f15b5422ca616e2585d699c47aa4e7b7dcf1d > # save the config file to linux build tree > mkdir build_dir > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All errors (new ones prefixed by >>): > > >> ld.lld: error: undefined symbol: btf_obj_id > >>> referenced by trampoline.c > >>> bpf/trampoline.o:(bpf_trampoline_link_cgroup_shim) in archive kernel/built-in.a > >>> referenced by trampoline.c > >>> bpf/trampoline.o:(bpf_trampoline_unlink_cgroup_shim) in archive kernel/built-in.a It is probably because obj-$(CONFIG_BPF_JIT) += trampoline.o while obj-$(CONFIG_BPF_SYSCALL) += btf.o. Good catch but seems minor and should not affect the review. Please hold off the respin a little first so that the review can continue on this revision.
