Hi Kui-Feng, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Kui-Feng-Lee/Attach-a-cookie-to-a-tracing-program/20220127-054929 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: mips-allmodconfig (https://download.01.org/0day-ci/archive/20220127/202201270704.kcMiWFUK-lkp@xxxxxxxxx/config) compiler: mips-linux-gcc (GCC) 11.2.0 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/6dffffc1fe68f386715b4ee396fb6a5c738fb065 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kui-Feng-Lee/Attach-a-cookie-to-a-tracing-program/20220127-054929 git checkout 6dffffc1fe68f386715b4ee396fb6a5c738fb065 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): kernel/trace/bpf_trace.c: In function '____bpf_get_attach_cookie_tracing': >> kernel/trace/bpf_trace.c:1095:16: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1095 | prog = (const struct bpf_prog *)((u64 *)ctx)[-off]; | ^ vim +1095 kernel/trace/bpf_trace.c 1086 1087 BPF_CALL_1(bpf_get_attach_cookie_tracing, void *, ctx) 1088 { 1089 const struct bpf_prog *prog; 1090 int off = get_trampo_var_off(ctx, BPF_TRAMP_F_PROG_ID); 1091 1092 if (off < 0) 1093 return 0; 1094 > 1095 prog = (const struct bpf_prog *)((u64 *)ctx)[-off]; 1096 1097 return prog->aux->cookie; 1098 } 1099 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
