linux-kernel - Re: [PATCH rdma-next 2/4] lib/scatterlist: Add support in dynamically allocation of SG entries

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Date:   Mon, 7 Sep 2020 09:29:16 +0200
From:   Christoph Hellwig <hch@....de>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Christoph Hellwig <hch@....de>, Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Maor Gottlieb <maorg@...dia.com>, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org
Subject: Re: [PATCH rdma-next 2/4] lib/scatterlist: Add support in
 dynamically allocation of SG entries

> +static inline void _sg_chain(struct scatterlist *chain_sg,
> +			     struct scatterlist *sgl)
> +{
> +	/*
> +	 * offset and length are unused for chain entry. Clear them.
> +	 */
> +	chain_sg->offset = 0;
> +	chain_sg->length = 0;
> +
> +	/*
> +	 * Set lowest bit to indicate a link pointer, and make sure to clear
> +	 * the termination bit if it happens to be set.
> +	 */
> +	chain_sg->page_link = ((unsigned long) sgl | SG_CHAIN) & ~SG_END;
> +}

Please call this __sg_chain to stick with our normal kernel naming
convention.