Messages in this thread Patch in this message | | | Date | Wed, 11 Dec 2019 15:12:39 -0800 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH tip/core/rcu 01/12] rcu: Remove rcu_swap_protected() |
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On Wed, Dec 11, 2019 at 08:09:11PM +0100, Matthias Brugger wrote: > > > On 11/12/2019 19:37, Paul E. McKenney wrote: > > On Tue, Dec 10, 2019 at 07:51:22PM -0800, Paul E. McKenney wrote: > >> On Tue, Dec 10, 2019 at 10:35:49PM -0500, Martin K. Petersen wrote: > >>> > >>> Paul, > >>> > >>>> Now that the calls to rcu_swap_protected() have been replaced by > >>>> rcu_replace_pointer(), this commit removes rcu_swap_protected(). > >>> > >>> It appears there are two callers remaining in Linus' master. Otherwise > >>> looks good to me. > >> > >> I did queue a fix for one of them, and thank you for calling my > >> attention to the new one. This commit should hit -next soon, so > >> hopefully this will discourage further additions. ;-) > >> > >>> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> > >> > >> Thank you! > > > > And here is the patch for the new one. > > > > Thanx, Paul > > > > ------------------------------------------------------------------------ > > > > commit 10699d92c906707d679e28b099cd798a519b4f51 > > 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> > > Signed-off-by: Paul E. McKenney <paulmck@kernel.org> > > 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> > > > > diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c > > index 53b5a4b..80986ce 100644 > > --- 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
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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>
diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c index 53b5a4b..59c1878 100644 --- 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_replace_pointer(wcid->aggr[tidno], tid, + lockdep_is_held(&dev->mutex)); if (tid) { mt76_rx_aggr_shutdown(dev, tid); kfree_rcu(tid, rcu_head);
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