Re: [PATCH RFC tip/core/rcu 05/15] percpu: READ_ONCE() now implies smp_read_barrier_depends()

From: Paul E. McKenney
Date: Tue Oct 10 2017 - 11:30:59 EST


On Tue, Oct 10, 2017 at 07:08:13AM -0700, Tejun Heo wrote:
> On Mon, Oct 09, 2017 at 05:22:39PM -0700, Paul E. McKenney wrote:
> > Because READ_ONCE() now implies smp_read_barrier_depends(), this commit
> > removes the now-redundant smp_read_barrier_depends() following the
> > READ_ONCE() in __ref_is_percpu().
> >
> > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> > Cc: Tejun Heo <tj@xxxxxxxxxx>
> > Cc: Christoph Lameter <cl@xxxxxxxxx>
>
> Acked-by: Tejun Heo <tj@xxxxxxxxxx>

Thank you, applied!

> Please feel free to route with other patches. If this should be
> routed through the percpu tree, please let me know.

This depends on some other not-yet-finalized patch series, so if you
are OK with it, I will route them with that group of serieses.

Thanx, Paul