[RFC PATCH -tip 1/2] trace: kprobes: Show sum of probe/retprobe nmissed count

[Masami Hiramatsu]

Show sum of probe and retprobe nmissed count in
kprobe_profile, since retprobe can be missed even
if the kprobe itself succeeeded.
This explains user why their return probe didn't hit
sometimes.

Signed-off-by: Masami Hiramatsu <mhira...@kernel.org>
Tested-by: Alban Crequy <al...@kinvolk.io>
---
 kernel/trace/trace_kprobe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index c9b5aa10fbf9..fe1bd541216c 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -928,7 +928,7 @@ static int probes_profile_seq_show(struct seq_file *m, void 
*v)
        seq_printf(m, "  %-44s %15lu %15lu\n",
                   trace_event_name(&tk->tp.call),
                   trace_kprobe_nhit(tk),
-                  tk->rp.kp.nmissed);
+                  tk->rp.kp.nmissed + tk->rp.nmissed);
 
        return 0;
 }