From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: [PATCH tip/core/rcu 16/21] drivers/infiniband: Remove now-redundant smp_read_barrier_depends() Date: Tue, 5 Dec 2017 12:06:14 -0800 Message-ID: <20171205200614.GQ7829@linux.vnet.ibm.com> References: <20171201195053.GA23494@linux.vnet.ibm.com> <1512157876-24665-16-git-send-email-paulmck@linux.vnet.ibm.com> <20171202001109.GQ7754@ziepe.ca> <20171202010851.GL7829@linux.vnet.ibm.com> <20171205150832.GA27409@ziepe.ca> Reply-To: paulmck@linux.vnet.ibm.com Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20171205150832.GA27409@ziepe.ca> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jason Gunthorpe Cc: Dennis Dalessandro , linux-kernel@vger.kernel.org, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, Doug Ledford , Richard Henderson , Ivan Kokshaysky , Matt Turner , Michael Cree , Andrea Parri , linux-rdma@vger.kernel.org, linux-alpha@vger.kernel.org On Tue, Dec 05, 2017 at 08:08:32AM -0700, Jason Gunthorpe wrote: > > commit c389c98ec5f4a7aa4c36853e89801eb5ea81870e > > Author: Paul E. McKenney > > Date: Mon Nov 27 09:04:22 2017 -0800 > > > > drivers/infiniband: Remove now-redundant smp_read_barrier_depends() > > > > The smp_read_barrier_depends() does nothing at all except on DEC Alpha, > > and no current DEC Alpha systems use Infiniband: > > > > lkml.kernel.org/r/20171023085921.jwbntptn6ictbnvj@tower > > > > This commit therefore makes Infiniband depend on !ALPHA and removes > > the now-ineffective invocations of smp_read_barrier_depends() from > > the InfiniBand driver. > > > > Please note that this patch should not be construed as my saying that > > InfiniBand's memory ordering is correct, but rather that this patch does > > not in any way affect InfiniBand's correctness. In other words, the > > result of applying this patch is bug-for-bug compatible with the original. > > > > Signed-off-by: Paul E. McKenney > > Cc: Doug Ledford > > Cc: Jason Gunthorpe > > Cc: Richard Henderson > > Cc: Ivan Kokshaysky > > Cc: Matt Turner > > Cc: Michael Cree > > Cc: Andrea Parri > > Cc: > > Cc: > > [ paulmck: Removed drivers/dma/ioat/dma.c per Jason Gunthorpe's feedback. ] > > Let me know if you want this patch to flow through the rdma tree.. > > Acked-by: Jason Gunthorpe I applied your ack, thank you! Your choice as to what tree it flows through. By default, and if all goes well, I will push this series through -rcu and -tip during the next merge window. Thanx, Paul