[PATCH] mm: Export PageHeadHuge()

[David Howells]

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

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: linux-mm@xxxxxxxxx
---

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

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e09159c957e3..16f2e5d5f1a9 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1852,6 +1852,7 @@ 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.