linux-kernel - [PATCH v2 0/1] ftrace: add unit test for removing trace function

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Message-Id: <20210918153043.318016-1-carles.pey@gmail.com>
Date:   Sat, 18 Sep 2021 19:30:42 +0400
From:   Carles Pey <carles.pey@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Carles Pey <carles.pey@...il.com>
Subject: [PATCH v2 0/1] ftrace: add unit test for removing trace function

Hi,

This patch adds a basic startup self-test for removing a traced
function.

Being kallsyms_lookup_name made unexported there is no easy use of
ftrace_set_filter_ip from kernel modules, leaving with ftrace_set_filter
as the way to set trace functions. The ftrace_set_filter API is not
explicit on how to remove trace functions, and there is no such use case
either in the kernel source-tree for which I decided to add an example
of it use as a self-test.

Changes since v1:
 - Added changelog and sign-off line.

Carles Pey (1):
  ftrace: add unit test for removing trace function

 kernel/trace/trace_selftest.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

-- 
2.26.3