Re: [PATCH tip/core/rcu 03/15] rcu: Drive TASKS_RCU directly off of PREEMPT

[Steven Rostedt]

On Mon, 24 Jul 2017 14:44:32 -0700
"Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> wrote:

> The actual use of TASKS_RCU is only when PREEMPT, otherwise RCU-sched
> is used instead.  This commit therefore makes synchronize_rcu_tasks()
> and call_rcu_tasks() available always, but mapped to synchronize_sched()
> and call_rcu_sched(), respectively, when !PREEMPT.  This approach also
> allows some #ifdefs to be removed from rcutorture.
> 

Hmm, I'll need to update ftrace. I believe I call synchronize_sched()
twice with !PREEMPT then.

-- Steve