linux-kernel - [PATCH 0/3] tracing: Fix some selftest issues

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Message-Id: <171805478534.52471.6269290579314514778.stgit@devnote2>
Date: Tue, 11 Jun 2024 06:26:25 +0900
From: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Tom Zanussi <zanussi@...nel.org>
Subject: [PATCH 0/3] tracing: Fix some selftest issues

Hi,

Here is v2 of a series of some fixes/cleanups for the test modules and
boot time selftest of kprobe events. The previous version is here;

https://lore.kernel.org/all/171671825710.39694.6859036369216249956.stgit@devnote2/

In this version, I just update the description of the first patch to add
what bad things happen when the modules are built in.

I found a WARNING message with some boot time selftest configuration, which
came from the combination of embedded kprobe generate API tests module and
ftrace boot-time selftest. Since kprobe and synthetic event generation API
test modules add new events and lock it. Thus dynamic event remove-all
operation failes. This also causes all ftracetest failed because it tries
to cleanup all dynamic events before running test cases.

The main problem is that these modules should not be built-in. But I also
think this WARNING message is useless (because there are warning messages
already) and the cleanup code is redundant. This series fixes those issues.

Thank you,

---

Masami Hiramatsu (Google) (3):
      tracing: Build event generation tests only as modules
      tracing/kprobe: Remove unneeded WARN_ON_ONCE() in selftests
      tracing/kprobe: Remove cleanup code unrelated to selftest

 kernel/trace/Kconfig        |    4 ++--
 kernel/trace/trace_kprobe.c |   29 ++++++++++++-----------------
 2 files changed, 14 insertions(+), 19 deletions(-)

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