linux-kernel - Re: [RFC v2 02/11] iov_iter: introduce iter type for pre-registered dma

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Message-ID: <aTFlx1Rb-zS5vxlq@infradead.org>
Date: Thu, 4 Dec 2025 02:43:19 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Pavel Begunkov <asml.silence@...il.com>
Cc: linux-block@...r.kernel.org, io-uring@...r.kernel.org,
	Vishal Verma <vishal1.verma@...el.com>, tushar.gohad@...el.com,
	Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>,
	Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>,
	linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
	linux-fsdevel@...r.kernel.org, linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [RFC v2 02/11] iov_iter: introduce iter type for pre-registered
 dma

On Sun, Nov 23, 2025 at 10:51:22PM +0000, Pavel Begunkov wrote:
> diff --git a/include/linux/uio.h b/include/linux/uio.h
> index 5b127043a151..1b22594ca35b 100644
> --- a/include/linux/uio.h
> +++ b/include/linux/uio.h
> @@ -29,6 +29,7 @@ enum iter_type {
>  	ITER_FOLIOQ,
>  	ITER_XARRAY,
>  	ITER_DISCARD,
> +	ITER_DMA_TOKEN,

Please use DMABUF/dmabuf naming everywhere, this is about dmabufs and
not dma in general.

Otherwise this looks good.