Export PageHeadHuge() - it's used by folio_test_hugetlb() and thence by such as folio_file_page() and folio_contains(). Matthew suggested I use the first of those instead of doing the same calculation manually - but I can't call it from a module. Kirill suggested rearranging things to put it in a header, but that introduces header dependencies because of where constants are defined. Signed-off-by: David Howells <dhowells@xxxxxxxxxx> cc: willy@xxxxxxxxxxxxx Link: https://lore.kernel.org/r/163707085314.3221130.14783857863702203440.stgit@xxxxxxxxxxxxxxxxxxxxxx/ --- mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 61895cc01d09..5768df43b05c 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1854,6 +1854,7 @@ 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.
