linux-kernel - [PATCH 0/3] tracing/kprobes: Fix event generation API etc.

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Message-Id: <158779373972.6082.16695832932765258919.stgit@devnote2>
Date:   Sat, 25 Apr 2020 14:48:59 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        Tom Zanussi <zanussi@...nel.org>, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>
Subject: [PATCH 0/3] tracing/kprobes: Fix event generation API etc.

Hello,

Here are bugfix/cleanup patches for the kprobe tracer, [1/3]
is a typo fix, [2/3] is fixing boot-time tracer and [3/3] is
error checking for the new in-kernel kprobe event API.

Tom, I found that your commit 29a154810546 ("tracing: Change
trace_boot to use kprobe_event interface") broke the boot-time
tracer's kprobe event because of wrong API usage. Could you
review it?

I marked [3/3] as a bugfix, because if the loc == NULL, 
__kprobe_event_gen_cmd_start() obviously does not work.
But it reports actual error at kprobe_event_gen_cmd_end().
That is not good for developers to debug it.

Thank you,

---

Masami Hiramatsu (3):
      tracing/kprobes: Fix a double initialization typo
      tracing/boottime: Fix kprobe event API usage
      tracing/kprobes: Reject new event if loc is NULL

 kernel/trace/trace_boot.c   |   20 ++++++++------------
 kernel/trace/trace_kprobe.c |    8 +++++++-
 2 files changed, 15 insertions(+), 13 deletions(-)

--
Masami Hiramatsu (Linaro) <mhiramat@...nel.org>