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Date:   Tue, 10 Aug 2021 22:54:38 +0100
From:   David Howells <>
To:     "Matthew Wilcox (Oracle)" <>
        Christoph Hellwig <>
Subject: Re: [PATCH v14 085/138] mm/filemap: Add filemap_alloc_folio

Matthew Wilcox (Oracle) <> wrote:

> Reimplement __page_cache_alloc as a wrapper around filemap_alloc_folio
> to allow filesystems to be converted at our leisure.  Increases
> kernel text size by 133 bytes, mostly in cachefiles_read_backing_file().
> pagecache_get_page() shrinks by 32 bytes, though.
> Signed-off-by: Matthew Wilcox (Oracle) <>
> Reviewed-by: Christoph Hellwig <>
> ...
> +static inline struct page *__page_cache_alloc(gfp_t gfp)
> +{
> +	return &filemap_alloc_folio(gfp, 0)->page;
> +}

Might be worth a note that this *will* return NULL if the allocation fails,
though I guess it's deprecated?

Reviewed-by: David Howells <>

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