Re: [PATCH tip/core/rcu 1/3] rcu-tasks: *_ONCE() for rcu_tasks_cbs_head

[Paul E. McKenney]

On Tue, Feb 18, 2020 at 06:13:23PM -0500, Steven Rostedt wrote:
> On Tue, 18 Feb 2020 14:54:55 -0800
> "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote:
> 
> >     This data race was reported by KCSAN.  Not appropriate for backporting
> >     due to failure being unlikely and due to the mild consequences of the
> >     failure, namely a confusing rcutorture console message.
> >     
> 
> I've seen patches backported for less. :-/
> 
> Really, any statement that says something may go awry with the code,
> will be an argument to backport it.

You aren't kidding!  Rumor has it that someone tried backporting the
RCU flavor-consolidation work, for but one example.  Though I cannot
help but salute the level of insanity represented by that attempt.  ;-)

							Thanx, Paul