PageHeadHuge      574 include/linux/page-flags.h int PageHeadHuge(struct page *page);
PageHeadHuge      425 include/linux/pagemap.h 	if (unlikely(PageHeadHuge(page)))
PageHeadHuge     1227 mm/hugetlb.c   	VM_BUG_ON_PAGE(!PageHeadHuge(page), page);
PageHeadHuge     1233 mm/hugetlb.c   	VM_BUG_ON_PAGE(!PageHeadHuge(page), page);