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ftrace: Use guard to take the ftrace_lock in release_probe()

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The ftrace_lock is held throughout the entire release_probe() function.
Use guard to simplify any exit paths.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/20241028071308.250787901@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
2024-10-28 03:12:32 -04:00
committed by Steven Rostedt (Google)
parent 1432afb50d
commit 9687bbf219
1 changed files with 1 additions and 2 deletions
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3
kernel/trace/ftrace.c
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@@ -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)