From: Steven Rostedt <rostedt@goodmis.org>
To: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: "Paul E . McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Josef Bacik <josef@toxicpanda.com>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
rcu@vger.kernel.org
Subject: Re: [PATCH] fprobe: Use guard(rcu_sched_notrace) and check rcu_is_watching()
Date: Wed, 30 Sep 2026 16:03:25 -0400 [thread overview]
Message-ID: <20260930160325.3f2621ea@fedora> (raw)
In-Reply-To: <179064115227.394389.16910234241400391996.stgit@devnote2>
On Tue, 29 Sep 2026 09:19:12 +0900
"Masami Hiramatsu (Google)" <mhiramat@kernel.org> wrote:
> @@ -329,16 +333,14 @@ static void fprobe_ftrace_entry(unsigned long ip, unsigned long parent_ip,
> struct fprobe *fp;
> int bit;
>
> + if (!rcu_is_watching())
> + return;
> +
I'm thinking these should really be:
if (WARN_ON_ONCE(!rcu_is_watching()))
return;
-- Steve
next prev parent reply other threads:[~2026-09-30 20:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-29 0:19 Masami Hiramatsu (Google)
2026-09-30 18:47 ` Paul E. McKenney
2026-09-30 20:03 ` Steven Rostedt [this message]
2026-10-01 13:23 ` Masami Hiramatsu (Google)
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