samples/bpf: xdp_redirect_cpu have not need for read_trace_pipe

The sample xdp_redirect_cpu is not using helper bpf_trace_printk.
Thus it makes no sense that the --debug option us reading
from /sys/kernel/debug/tracing/trace_pipe via read_trace_pipe.
Simply remove it.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/samples/bpf/xdp_redirect_cpu_user.c b/samples/bpf/xdp_redirect_cpu_user.c
index 2d23054aaccf456c016bde08df1b4d1e95b3c1e7..f141e752ca0a7279061a43de9af0a7bf2c4ff1f9 100644 (file)
--- a/samples/bpf/xdp_redirect_cpu_user.c
+++ b/samples/bpf/xdp_redirect_cpu_user.c
@@ -51,7 +51,6 @@ static const struct option long_options[] = {
        {"help",        no_argument,            NULL, 'h' },
        {"dev",         required_argument,      NULL, 'd' },
        {"skb-mode",    no_argument,            NULL, 'S' },
-       {"debug",       no_argument,            NULL, 'D' },
        {"sec",         required_argument,      NULL, 's' },
        {"prognum",     required_argument,      NULL, 'p' },
        {"qsize",       required_argument,      NULL, 'q' },
@@ -563,7 +562,6 @@ int main(int argc, char **argv)
        bool use_separators = true;
        bool stress_mode = false;
        char filename[256];
-       bool debug = false;
        int added_cpus = 0;
        int longindex = 0;
        int interval = 2;
@@ -624,9 +622,6 @@ int main(int argc, char **argv)
                case 'S':
                        xdp_flags |= XDP_FLAGS_SKB_MODE;
                        break;
-               case 'D':
-                       debug = true;
-                       break;
                case 'x':
                        stress_mode = true;
                        break;
@@ -688,11 +683,6 @@ int main(int argc, char **argv)
                return EXIT_FAIL_XDP;
        }
 
-       if (debug) {
-               printf("Debug-mode reading trace pipe (fix #define DEBUG)\n");
-               read_trace_pipe();
-       }
-
        stats_poll(interval, use_separators, prog_num, stress_mode);
        return EXIT_OK;
 }