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From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>,
	James Hogan <jhogan@kernel.org>,
	Linux Next Mailing List <linux-next@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Huacai Chen <chenhc@lemote.com>, Huang Pei <huangpei@loongson.cn>
Subject: Re: linux-next: manual merge of the mips tree with the mips-fixes tree
Date: Wed, 6 Feb 2019 10:44:33 +1100
Message-ID: <20190206104433.1c832a0b@canb.auug.org.au> (raw)
In-Reply-To: <20190205233530.tnk6boxzxm7okgcr@pburton-laptop>

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Hi Paul,

On Tue, 5 Feb 2019 23:35:31 +0000 Paul Burton <paul.burton@mips.com> wrote:
>
> cmpxchg() doesn't need the added loongson_llsc_mb() barrier that
> set_pte() has in mips-fixes because for the affected Loongson 3
> configurations the smp_mb__before_llsc() that cmpxchg() already contains
> is equivalent (both will emit a "sync 0" instruction).

OK, good to know, thanks.

-- 
Cheers,
Stephen Rothwell

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  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-05 22:17 Stephen Rothwell
2019-02-05 23:35 ` Paul Burton
2019-02-05 23:44   ` Stephen Rothwell [this message]
  -- strict thread matches above, loose matches on Subject: below --
2019-11-04 23:05 Stephen Rothwell
2019-02-07 22:22 Stephen Rothwell
2018-06-28 23:46 Stephen Rothwell

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