linux-kernel - Re: [PATCH 2/2] selftests: tracing: Use mutex

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Message-ID: <20250703103039.3559a7e1@batman.local.home>
Date: Thu, 3 Jul 2025 10:30:39 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc: Shuah Khan <shuah@...nel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 2/2] selftests: tracing: Use mutex_unlock for testing
 glob filter

On Thu,  3 Jul 2025 13:26:43 +0900
"Masami Hiramatsu (Google)" <mhiramat@...nel.org> wrote:

> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> 
> Since commit c5b6ababd21a ("locking/mutex: implement
> mutex_trylock_nested") makes mutex_trylock() as an inlined
> function if CONFIG_DEBUG_LOCK_ALLOC=y, we can not use
> mutex_trylock() for testing the glob filter of ftrace.
> 
> Use mutex_unlock instead.
> 
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Acked-by: Steven Rostedt (Google) <rostedt@...dmis.org>

-- Steve