[PATCH v4 17/27] perf,tracing: Allow function tracing when !RCU

[Peter Zijlstra <peterz@xxxxxxxxxxxxx>]

Since perf is now able to deal with !rcu_is_watching() contexts,
remove the restraint.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 kernel/trace/trace_event_perf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -477,7 +477,7 @@ static int perf_ftrace_function_register
 {
 	struct ftrace_ops *ops = &event->ftrace_ops;
 
-	ops->flags   = FTRACE_OPS_FL_RCU;
+	ops->flags   = 0;
 	ops->func    = perf_ftrace_function_call;
 	ops->private = (void *)(unsigned long)nr_cpu_ids;