linux-kernel - [PATCH] mm: Export PageHeadHuge()

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Message-ID: <162947608701.760537.640097323184606750.stgit@warthog.procyon.org.uk>
Date:   Fri, 20 Aug 2021 17:14:47 +0100
From:   David Howells <dhowells@...hat.com>
To:     willy@...radead.org
Cc:     linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mm: Export PageHeadHuge()

Export PageHeadHuge() - it's used by folio_test_hugetlb() and thence by
folio_file_page() and folio_contains().

Signed-off-by: David Howells <dhowells@...hat.com>
---

 mm/hugetlb.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 68eead0259cc..ad6ef6d2c0bc 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1717,6 +1717,7 @@ int PageHeadHuge(struct page *page_head)
 
 	return page_head[1].compound_dtor == HUGETLB_PAGE_DTOR;
 }
+EXPORT_SYMBOL(PageHeadHuge);
 
 /*
  * Find and lock address space (mapping) in write mode.