On Tue, May 19, 2020 at 07:52:33PM -0000, tip-bot2 for Thomas Gleixner wrote: > @@ -979,7 +988,7 @@ static void rcu_disable_urgency_upon_qs(struct rcu_data > *rdp) > * if the current CPU is not in its idle loop or is in an interrupt or > * NMI handler, return true. > */ > -bool notrace rcu_is_watching(void) > +bool rcu_is_watching(void) > { > bool ret; >
This ^.. it is required because __ftrace_ops_list_func() / ftrace_ops_assist_func() call it outside of ftrace recursion, but only when FL_RCU, and perf happens to be the only user of that. another morning wasted... :/