linux-kernel - Re: [PATCH] asm-generic: introduce io_stop

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Date:   Wed, 22 Dec 2021 10:43:12 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Xiongfeng Wang <wangxiongfeng2@...wei.com>, will@...nel.org,
        mark.rutland@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, moyufeng@...wei.com,
        linux-arch@...r.kernel.org
Subject: Re: [PATCH] asm-generic: introduce io_stop_wc() and add
 implementation for ARM64

On Wed, Dec 22, 2021 at 01:08:15AM -0800, Christoph Hellwig wrote:
> So what is going to use this?

There was a series about 6 months ago making use of the new DGH arm64
instruction in a network driver:

https://lore.kernel.org/r/1627614864-50824-1-git-send-email-huangguangbin2@huawei.com

We bike-shedded on the name of the macro since (now settled on
io_stop_wc()) and there wasn't much point in carrying the rest of the
patches. I assume the driver changes will go in via their normal route
once the macro above is merged.

-- 
Catalin