linux-ext4 - Re: [RFC v3 4/7] iomap: Add iomap_folio

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Date:   Fri, 23 Dec 2022 07:04:37 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Andreas Gruenbacher <agruenba@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        "Darrick J . Wong" <djwong@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org, cluster-devel@...hat.com
Subject: Re: [RFC v3 4/7] iomap: Add iomap_folio_prepare helper

> +struct folio *iomap_folio_prepare(struct iomap_iter *iter, loff_t pos)
> +{
> +	unsigned fgp = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE | FGP_NOFS;
> +
> +	if (iter->flags & IOMAP_NOWAIT)
> +		fgp |= FGP_NOWAIT;
> +
> +	return __filemap_get_folio(iter->inode->i_mapping, pos >> PAGE_SHIFT,
> +			fgp, mapping_gfp_mask(iter->inode->i_mapping));
> +}
> +EXPORT_SYMBOL(iomap_folio_prepare);

I'd name this __iomap_get_folio to match __filemap_get_folio.
And all iomap exports are EXPORT_SYMBOL_GPL.