linux-kernel - Re: [PATCH RFC 5/7] md/raid5: convert to use bio_submit

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Message-ID: <aKxCStAJPOI3LdtG@infradead.org>
Date: Mon, 25 Aug 2025 04:00:26 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Yu Kuai <yukuai1@...weicloud.com>
Cc: hch@...radead.org, colyli@...nel.org, hare@...e.de, tieren@...as.com,
	axboe@...nel.dk, tj@...nel.org, josef@...icpanda.com,
	song@...nel.org, yukuai3@...wei.com, akpm@...ux-foundation.org,
	neil@...wn.name, linux-block@...r.kernel.org,
	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	linux-raid@...r.kernel.org, yi.zhang@...wei.com,
	yangerkun@...wei.com, johnny.chenyi@...wei.com
Subject: Re: [PATCH RFC 5/7] md/raid5: convert to use bio_submit_split()

On Mon, Aug 25, 2025 at 05:36:58PM +0800, Yu Kuai wrote:
> +		raid_bio = bio_submit_split(raid_bio, sectors,
> +					    &conf->bio_split);
> +		if (!raid_bio)
> +			return NULL;
> +
> +		raid_bio->bi_opf &= ~REQ_NOMERGE;

It almost feels as if md wants a little helper that wraps
bio_submit_split and also clears REQ_NOMERGE?