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From: Nam Cao <namcao@linutronix.de>
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To: Gabriele Monaco <gmonaco@redhat.com>, linux-kernel@vger.kernel.org,
 linux-trace-kernel@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
 Gabriele Monaco <gmonaco@redhat.com>, Masami Hiramatsu
 <mhiramat@kernel.org>
Cc: Thomas Weissschuh <thomas.weissschuh@linutronix.de>, Tomas Glozar
 <tglozar@redhat.com>, John Kacur <jkacur@redhat.com>, Wen Yang
 <wen.yang@linux.dev>
Subject: Re: [PATCH v5 13/17] rv: Add KUnit mock for current
In-Reply-To: <20260723074534.43521-14-gmonaco@redhat.com>
References: <20260723074534.43521-1-gmonaco@redhat.com>
 <20260723074534.43521-14-gmonaco@redhat.com>
Date: Fri, 31 Jul 2026 12:59:30 +0200
Message-ID: <87jyqbo25p.fsf@yellow.woof>
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Gabriele Monaco <gmonaco@redhat.com> writes:

> Some monitors do not only rely on tracepoint arguments but also on the
> currently executing task.
> This makes it more challenging to mock events in KUnit.
>
> Define wrapper functions around current, the functionality is mocked
> only during KUnit, an additional function call is avoided using a static
> branch unless any (even unrelated) KUnit test is running.
>
> Rely on a global mock_current variable that is set only by the RV KUnit
> tests and cleared on teardown. Unrelated KUnit tests that happen to
> trigger RV handlers would see it null and use current.
>
> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>

Reviewed-by: Nam Cao <namcao@linutronix.de>