2438 	struct page *page_tail = head + tail;  in __split_huge_page_tail()  local
2440 	VM_BUG_ON_PAGE(atomic_read(&page_tail->_mapcount) != -1, page_tail);  in __split_huge_page_tail()
2448 	page_tail->flags &= ~PAGE_FLAGS_CHECK_AT_PREP;  in __split_huge_page_tail()
2449 	page_tail->flags |= (head->flags &  in __split_huge_page_tail()
2462 	VM_BUG_ON_PAGE(tail > 2 && page_tail->mapping != TAIL_MAPPING,  in __split_huge_page_tail()
2463 			page_tail);  in __split_huge_page_tail()
2464 	page_tail->mapping = head->mapping;  in __split_huge_page_tail()
2465 	page_tail->index = head->index + tail;  in __split_huge_page_tail()
2476 	clear_compound_head(page_tail);  in __split_huge_page_tail()
2479 	page_ref_unfreeze(page_tail, 1 + (!PageAnon(head) ||  in __split_huge_page_tail()
2483 		set_page_young(page_tail);  in __split_huge_page_tail()
2485 		set_page_idle(page_tail);  in __split_huge_page_tail()
2487 	page_cpupid_xchg_last(page_tail, page_cpupid_last(head));  in __split_huge_page_tail()
2494 	lru_add_page_tail(head, page_tail, lruvec, list);  in __split_huge_page_tail()