From: Sinan Kaya <okaya@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>, John Garry <john.garry@huawei.com>
Cc: "xuwei (O)" <xuwei5@hisilicon.com>,
Bjorn Helgaas <bhelgaas@google.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
linux-arch <linux-arch@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: About commit "io: change inX() to have their own IO barrier overrides"
Date: Thu, 5 Mar 2020 22:44:08 -0500 [thread overview]
Message-ID: <90af535f-00ef-c1e3-ec20-aae2bd2a0d88@kernel.org> (raw)
In-Reply-To: <CAK8P3a0f9hnKGd6GJ8qFZSu+J-n4fY23TCGxQkmgJaxbpre50Q@mail.gmail.com>
On 3/3/2020 11:40 AM, Arnd Bergmann wrote:
>> - ret = read##bw(PCI_IOBASE + addr);
>> + __io_pbr();
>> + ret = __raw_read##bw(PCI_IOBASE + addr);
>> + __io_pbr();
> __io_par();
>
Why do we need to change read##bw above?
read##bw already provides strong ordering guarantees across multiple
architectures.
next prev parent reply other threads:[~2020-03-06 3:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 9:52 About commit "io: change inX() to have their own IO barrier overrides" John Garry
2020-02-28 23:57 ` Sinan Kaya
2020-03-02 12:35 ` John Garry
2020-03-02 16:44 ` Sinan Kaya
2020-03-03 13:18 ` John Garry
2020-03-03 16:40 ` Arnd Bergmann
2020-03-03 17:16 ` John Garry
2020-03-06 3:44 ` Sinan Kaya [this message]
2020-03-06 7:54 ` Arnd Bergmann
2020-03-06 10:39 ` John Garry
2020-03-06 15:16 ` Arnd Bergmann
2020-03-06 16:18 ` John Garry
2020-03-06 16:29 ` Arnd Bergmann
2020-03-06 16:43 ` John Garry
2020-03-11 16:12 ` John Garry
2020-03-06 21:15 ` Sinan Kaya
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