mm/hugetlb.c: defer PageHeadHuge() symbol export

No actual need of it. So keep it internal.

Signed-off-by: Andrea Arcangeli <[email protected]>
Cc: Khalid Aziz <[email protected]>
Cc: Pravin Shelar <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Ben Hutchings <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Minchan Kim <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

mm/hugetlb.c

@@ -709,7 +709,6 @@ int PageHeadHuge(struct page *page_head)
 
 	return get_compound_page_dtor(page_head) == free_huge_page;
 }
-EXPORT_SYMBOL_GPL(PageHeadHuge);
 
 pgoff_t __basepage_index(struct page *page)
 {