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

Peter Zijlstra
2020-02-21T13:50:44Z

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

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
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;