Hi Yonghong, [auto build test ERROR on net-next/master]
url: https://github.com/0day-ci/linux/commits/Yonghong-Song/bpf-permit-multiple-bpf-attachments-for-a-single-perf-tracepoint-event/20171024-080608 config: arm-omap2plus_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm All errors (new ones prefixed by >>): kernel/events/core.o: In function `_free_event': >> kernel/events/core.c:8193: undefined reference to >> `perf_event_detach_bpf_prog' >> kernel/events/core.o:(.debug_addr+0x25c): undefined reference to >> `perf_event_detach_bpf_prog' vim +8193 kernel/events/core.c 8186 8187 static void perf_event_free_bpf_prog(struct perf_event *event) 8188 { 8189 if (event->attr.type != PERF_TYPE_TRACEPOINT) { 8190 perf_event_free_bpf_handler(event); 8191 return; 8192 } > 8193 perf_event_detach_bpf_prog(event); 8194 } 8195 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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