From: Jason Gunthorpe <jgg-uk2M96/98Pc@public.gmane.org>
To: "Paul E. McKenney"
<paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Dennis Dalessandro
<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org,
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oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Richard Henderson <rth-hL46jP5Bxq7R7s880joybQ@public.gmane.org>,
Ivan Kokshaysky
<ink-biIs/Y0ymYJMZLIVYojuPNP0rXTJTi09@public.gmane.org>,
Matt Turner <mattst88-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Michael Cree <mcree-q3Ck4f9/EBK9koe0gwxAeg@public.gmane.org>,
Andrea Parri
<parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH tip/core/rcu 16/21] drivers/infiniband: Remove now-redundant smp_read_barrier_depends()
Date: Tue, 5 Dec 2017 08:08:32 -0700 [thread overview]
Message-ID: <20171205150832.GA27409@ziepe.ca> (raw)
In-Reply-To: <20171202010851.GL7829-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> commit c389c98ec5f4a7aa4c36853e89801eb5ea81870e
> Author: Paul E. McKenney <paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> 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 <paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> Cc: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> Cc: Jason Gunthorpe <jgg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Cc: Richard Henderson <rth-hL46jP5Bxq7R7s880joybQ@public.gmane.org>
> Cc: Ivan Kokshaysky <ink-biIs/Y0ymYJMZLIVYojuPNP0rXTJTi09@public.gmane.org>
> Cc: Matt Turner <mattst88-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: Michael Cree <mcree-q3Ck4f9/EBK9koe0gwxAeg@public.gmane.org>
> Cc: Andrea Parri <parri.andrea-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Cc: <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
> Cc: <linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
> [ 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 <jgg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
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next prev parent reply other threads:[~2017-12-05 15:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20171201195053.GA23494@linux.vnet.ibm.com>
2017-12-01 19:51 ` [PATCH tip/core/rcu 16/21] drivers/infiniband: Remove now-redundant smp_read_barrier_depends() Paul E. McKenney
[not found] ` <1512157876-24665-16-git-send-email-paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-12-02 0:11 ` Jason Gunthorpe
2017-12-02 1:08 ` Paul E. McKenney
[not found] ` <20171202010851.GL7829-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-12-05 15:08 ` Jason Gunthorpe [this message]
2017-12-05 20:06 ` Paul E. McKenney
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