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Date:   Fri, 20 Aug 2021 18:35:39 +0100
From:   Christoph Hellwig <hch@infradead.org>
To:     David Howells <dhowells@redhat.com>
Cc:     willy@infradead.org, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: Export PageHeadHuge()
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On Fri, Aug 20, 2021 at 05:14:47PM +0100, David Howells wrote:
> Export PageHeadHuge() - it's used by folio_test_hugetlb() and thence by
> folio_file_page() and folio_contains().

.. none of which are used in modular code in linux-next.