+int page_referenced(struct page *, int is_locked);
+int try_to_unmap(struct page *, int ignore_refs);
+void remove_from_swap(struct page *page);
+
+/*
+ * Called from mm/filemap_xip.c to unmap empty zero page
+ */
+pte_t *page_check_address(struct page *, struct mm_struct *,
+ unsigned long, spinlock_t **);
+
+/*
+ * Used by swapoff to help locate where page is expected in vma.
+ */
+unsigned long page_address_in_vma(struct page *, struct vm_area_struct *);