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Message-ID: <20241030053705.422226102@goodmis.org>
Date: Wed, 30 Oct 2024 01:36:56 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
Peter Zijlstra <peterz@...radead.org>
Subject: [for-next][PATCH 6/7] ftrace: Use guard to take the ftrace_lock in release_probe()
From: Steven Rostedt <rostedt@...dmis.org>
The ftrace_lock is held throughout the entire release_probe() function.
Use guard to simplify any exit paths.
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lore.kernel.org/20241028071308.250787901@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
kernel/trace/ftrace.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 64997416415e..c0fabd7da5b2 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5288,7 +5288,7 @@ static void release_probe(struct ftrace_func_probe *probe)
{
struct ftrace_probe_ops *probe_ops;
- mutex_lock(&ftrace_lock);
+ guard(mutex)(&ftrace_lock);
WARN_ON(probe->ref <= 0);
@@ -5306,7 +5306,6 @@ static void release_probe(struct ftrace_func_probe *probe)
list_del(&probe->list);
kfree(probe);
}
- mutex_unlock(&ftrace_lock);
}
static void acquire_probe_locked(struct ftrace_func_probe *probe)
--
2.45.2
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