The function stack_trace_sysctl() uses a goto on the error path to jump to the mutex_unlock() code. Replace the logic to use guard() and let the compiler worry about it.
Signed-off-by: Steven Rostedt (Google) <[email protected]> --- Changes since v1: https://lore.kernel.org/[email protected] - Removed fix to osnoise tracer that did not belong in this patch kernel/trace/trace_stack.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 7f9572a37333..14c6f272c4d8 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -520,20 +520,18 @@ stack_trace_sysctl(const struct ctl_table *table, int write, void *buffer, int was_enabled; int ret; - mutex_lock(&stack_sysctl_mutex); + guard(mutex)(&stack_sysctl_mutex); was_enabled = !!stack_tracer_enabled; ret = proc_dointvec(table, write, buffer, lenp, ppos); if (ret || !write || (was_enabled == !!stack_tracer_enabled)) - goto out; + return ret; if (stack_tracer_enabled) register_ftrace_function(&trace_ops); else unregister_ftrace_function(&trace_ops); - out: - mutex_unlock(&stack_sysctl_mutex); return ret; } -- 2.45.2
