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

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Message-ID: <CACzX3Av_g5g=ssfSjHzkosEj7DMU=+xY5fpdU-zYGYc0cUWPSA@mail.gmail.com>
Date: Fri, 6 Feb 2026 20:32:47 +0530
From: Anuj gupta <anuj1072538@...il.com>
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

> +void iov_iter_dma_token(struct iov_iter *i, unsigned int direction,
> +                       struct dma_token *token,
> +                       loff_t off, size_t count)
> +{
> +       WARN_ON(direction & ~(READ | WRITE));
> +       *i = (struct iov_iter){
> +               .iter_type = ITER_DMA_TOKEN,
> +               .data_source = direction,
> +               .dma_token = token,
> +               .iov_offset = 0,

nit: iov_offset is getting below too. can get rid of this one.
> +               .count = count,
> +               .iov_offset = off,
> +       };