Re: [PATCH tip/core/rcu 01/12] rcu: Remove rcu_swap_protected()

Paul E. McKenney
2019-12-12T18:21:42Z

On Thu, Dec 12, 2019 at 11:31:37AM +0200, Kalle Valo wrote:
> + linux-wireless
>
> "Paul E. McKenney" <paulmck@kernel.org> writes:
>
> > On Wed, Dec 11, 2019 at 08:09:11PM +0100, Matthias Brugger wrote:
> >> On 11/12/2019 19:37, Paul E. McKenney wrote:
> >>
> >> > --- a/drivers/net/wireless/mediatek/mt76/agg-rx.c
> >> > +++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c
> >> > @@ -281,8 +281,8 @@ void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tidno)
> >> > {
> >> > struct mt76_rx_tid *tid = NULL;
> >> >
> >> > - rcu_swap_protected(wcid->aggr[tidno], tid,
> >> > - lockdep_is_held(&dev->mutex));
> >> > + tid = rcu_swap_protected(wcid->aggr[tidno], tid,
> >> > + lockdep_is_held(&dev->mutex));
> >>
> >> I suppose you meant: rcu_replace_pointer() here.
> >
> > Indeed I did, and thank you for catching this! Bad patch day here. :-/
> >
> > Update below...
> >
> > Thanx, Paul
> >
> > ------------------------------------------------------------------------
> >
> > commit ad5572b091429a45e863acaa6a36cf396d44f58d
> > Author: Paul E. McKenney <paulmck@kernel.org>
> > Date: Wed Dec 11 10:30:21 2019 -0800
> >
> > wireless/mediatek: Replace rcu_swap_protected() with rcu_replace_pointer()
> >
> > This commit replaces the use of rcu_swap_protected() with the more
> > intuitively appealing rcu_replace_pointer() as a step towards removing
> > rcu_swap_protected().
> >
> > Link: https://lore.kernel.org/lkml/CAHk-=wiAsJLw1egFEE=Z7-GGtM6wcvtyytXZA1+BHqta4gg6Hw@mail.gmail.com/
> > Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
> > Reported-by: "Martin K. Petersen" <martin.petersen@oracle.com>
> > [ paulmck: Apply Matthias Brugger feedback. ]
> > Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
> > Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
> > Cc: Felix Fietkau <nbd@nbd.name>
> > Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
> > Cc: Ryder Lee <ryder.lee@mediatek.com>
> > Cc: Roy Luo <royluo@google.com>
> > Cc: Kalle Valo <kvalo@codeaurora.org>
> > Cc: "David S. Miller" <davem@davemloft.net>
> > Cc: Matthias Brugger <matthias.bgg@gmail.com>
> > Cc: <linux-wireless@vger.kernel.org>
> > Cc: <netdev@vger.kernel.org>
> > Cc: <linux-arm-kernel@lists.infradead.org>
> > Cc: <linux-mediatek@lists.infradead.org>
>
> Via which tree is this supposed to go? If I should take this please
> resend to linux-wireless so that patchwork sees it, but if someone else
> is planning to take this:
>
> Acked-by: Kalle Valo <kvalo@codeaurora.org>

I have queued it just preceding the commit that remove rcu_swap_protected()
with your ack, thank you!

Thanx, Paul