From: Mikulas Patocka <mpatocka@redhat.com>
To: "Maciej W. Rozycki" <macro@wdc.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
"Maciej W. Rozycki" <macro@linux-mips.org>,
Arnd Bergmann <arnd@arndb.de>,
Richard Henderson <rth@twiddle.net>,
Matt Turner <mattst88@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
alpha <linux-alpha@vger.kernel.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>
Subject: Re: [PATCH v7] alpha: fix memory barriers so that they conform to the specification
Date: Mon, 8 Jun 2020 02:58:39 -0400 (EDT) [thread overview]
Message-ID: <alpine.LRH.2.02.2006080256360.15393@file01.intranet.prod.int.rdu2.redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.20.2005270114380.1027@tpp.orcam.me.uk>
On Wed, 27 May 2020, Maciej W. Rozycki wrote:
> On Tue, 26 May 2020, Mikulas Patocka wrote:
>
> > This patch makes barriers confiorm to the specification.
> >
> > 1. We add mb() before readX_relaxed and writeX_relaxed -
> > memory-barriers.txt claims that these functions must be ordered w.r.t.
> > each other. Alpha doesn't order them, so we need an explicit barrier.
> > 2. We add mb() before reads from the I/O space - so that if there's a
> > write followed by a read, there should be a barrier between them.
> >
> > Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
> > Fixes: cd0e00c10672 ("alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering")
> > Fixes: 92d7223a7423 ("alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2")
> > Cc: stable@vger.kernel.org # v4.17+
> > Acked-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
>
> LGTM, thanks for persistence!
>
> Reviewed-by: Maciej W. Rozycki <macro@linux-mips.org>
>
> Maciej
Hi
Will you submit the patch to Linus' tree in this merge window?
Mikulas
next prev parent reply other threads:[~2020-06-08 6:58 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-06 11:21 [PATCH 1/2] alpha: add a delay between RTC port write and read Mikulas Patocka
2020-05-06 14:20 ` Arnd Bergmann
2020-05-06 17:12 ` [PATCH 1/2 v2] alpha: add a delay to inb_p, inb_w and inb_l Mikulas Patocka
2020-05-07 8:06 ` [PATCH 1/2 v3] " Mikulas Patocka
2020-05-07 8:20 ` Greg Kroah-Hartman
2020-05-07 10:53 ` Mikulas Patocka
2020-05-07 13:30 ` Arnd Bergmann
2020-05-07 14:09 ` Mikulas Patocka
2020-05-07 15:08 ` Arnd Bergmann
2020-05-07 15:45 ` Mikulas Patocka
2020-05-07 15:46 ` [PATCH v4] alpha: add a barrier after outb, outw and outl Mikulas Patocka
2020-05-07 19:12 ` Arnd Bergmann
2020-05-10 1:27 ` Maciej W. Rozycki
2020-05-10 1:25 ` [PATCH 1/2 v3] alpha: add a delay to inb_p, inb_w and inb_l Maciej W. Rozycki
2020-05-10 18:50 ` Mikulas Patocka
2020-05-11 14:58 ` Maciej W. Rozycki
2020-05-12 19:35 ` Mikulas Patocka
2020-05-13 14:41 ` Ivan Kokshaysky
2020-05-13 16:13 ` Greg Kroah-Hartman
2020-05-13 17:17 ` Maciej W. Rozycki
2020-05-22 13:03 ` Mikulas Patocka
2020-05-22 13:37 ` Maciej W. Rozycki
2020-05-22 13:26 ` Mikulas Patocka
2020-05-22 20:00 ` Mikulas Patocka
2020-05-23 10:26 ` [PATCH v4] alpha: fix memory barriers so that they conform to the specification Mikulas Patocka
2020-05-23 15:10 ` Ivan Kokshaysky
2020-05-23 15:34 ` Mikulas Patocka
2020-05-23 15:37 ` [PATCH v5] " Mikulas Patocka
2020-05-24 14:54 ` Maciej W. Rozycki
2020-05-25 13:56 ` Mikulas Patocka
2020-05-25 14:07 ` Arnd Bergmann
2020-05-25 14:45 ` Maciej W. Rozycki
2020-05-25 15:53 ` [PATCH v6] " Mikulas Patocka
2020-05-26 14:47 ` [PATCH v7] " Mikulas Patocka
2020-05-27 0:18 ` Maciej W. Rozycki
2020-06-08 6:58 ` Mikulas Patocka [this message]
2020-06-08 23:49 ` Matt Turner
2020-05-25 15:54 ` [PATCH v5] " Mikulas Patocka
2020-05-25 16:39 ` Maciej W. Rozycki
2020-05-26 14:48 ` Mikulas Patocka
2020-05-27 0:23 ` Maciej W. Rozycki
2020-05-23 16:44 ` [PATCH v4] " Maciej W. Rozycki
2020-05-23 17:09 ` Mikulas Patocka
2020-05-23 19:27 ` Maciej W. Rozycki
2020-05-23 20:11 ` Mikulas Patocka
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