ftrace: fix check for return value of register_module_notifier in event_trace_init

register_module_notifier() returns zero in the success case.
So fix the inverted fail case check in trace events modules
handler.

[ Impact: fix spurious warning on ftrace initialization]

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0eec0c5..9e91c4a 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1174,7 +1174,7 @@ static __init int event_trace_init(void)
        }
 
        ret = register_module_notifier(&trace_module_nb);
-       if (!ret)
+       if (ret)
                pr_warning("Failed to register trace events module notifier\n");
 
        return 0;