Hi Yonghong, [auto build test ERROR on net-next/master]
url: https://github.com/0day-ci/linux/commits/Yonghong-Song/bpf-add-support-for-sys_-enter-exit-_-tracepoints/20170803-213504 config: i386-randconfig-x019-201731 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): kernel/events/core.c: In function 'perf_event_set_bpf_prog': >> kernel/events/core.c:8073:18: error: implicit declaration of function >> 'is_syscall_trace_event' [-Werror=implicit-function-declaration] is_syscall_tp = is_syscall_trace_event(event->tp_event); ^~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/is_syscall_trace_event +8073 kernel/events/core.c 8059 8060 static int perf_event_set_bpf_prog(struct perf_event *event, u32 prog_fd) 8061 { 8062 bool is_kprobe, is_tracepoint, is_syscall_tp; 8063 struct bpf_prog *prog; 8064 8065 if (event->attr.type != PERF_TYPE_TRACEPOINT) 8066 return perf_event_set_bpf_handler(event, prog_fd); 8067 8068 if (event->tp_event->prog) 8069 return -EEXIST; 8070 8071 is_kprobe = event->tp_event->flags & TRACE_EVENT_FL_UKPROBE; 8072 is_tracepoint = event->tp_event->flags & TRACE_EVENT_FL_TRACEPOINT; > 8073 is_syscall_tp = is_syscall_trace_event(event->tp_event); 8074 if (!is_kprobe && !is_tracepoint && !is_syscall_tp) 8075 /* bpf programs can only be attached to u/kprobe or tracepoint */ 8076 return -EINVAL; 8077 8078 prog = bpf_prog_get(prog_fd); 8079 if (IS_ERR(prog)) 8080 return PTR_ERR(prog); 8081 8082 if ((is_kprobe && prog->type != BPF_PROG_TYPE_KPROBE) || 8083 (is_tracepoint && prog->type != BPF_PROG_TYPE_TRACEPOINT) || 8084 (is_syscall_tp && prog->type != BPF_PROG_TYPE_TRACEPOINT)) { 8085 /* valid fd, but invalid bpf program type */ 8086 bpf_prog_put(prog); 8087 return -EINVAL; 8088 } 8089 8090 if (is_tracepoint) { 8091 int off = trace_event_get_offsets(event->tp_event); 8092 8093 if (prog->aux->max_ctx_offset > off) { 8094 bpf_prog_put(prog); 8095 return -EACCES; 8096 } 8097 } 8098 event->tp_event->prog = prog; 8099 8100 return 0; 8101 } 8102 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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