diff --git a/mm/memory.c b/mm/memory.c
index 1002f47..7512933 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1888,6 +1888,7 @@
 		ptep_clear_flush_notify(vma, address, page_table);
 		set_pte_at(mm, address, page_table, entry);
 		update_mmu_cache(vma, address, entry);
+		SetPageSwapBacked(new_page);
 		lru_cache_add_active(new_page);
 		page_add_new_anon_rmap(new_page, vma, address);
 
@@ -2382,6 +2383,7 @@
 	if (!pte_none(*page_table))
 		goto release;
 	inc_mm_counter(mm, anon_rss);
+	SetPageSwapBacked(page);
 	lru_cache_add_active(page);
 	page_add_new_anon_rmap(page, vma, address);
 	set_pte_at(mm, address, page_table, entry);
@@ -2523,6 +2525,7 @@
 		set_pte_at(mm, address, page_table, entry);
 		if (anon) {
                         inc_mm_counter(mm, anon_rss);
+			SetPageSwapBacked(page);
                         lru_cache_add_active(page);
                         page_add_new_anon_rmap(page, vma, address);
 		} else {
diff --git a/mm/migrate.c b/mm/migrate.c
index ad15b5e..c073274 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -572,6 +572,8 @@
 	/* Prepare mapping for the new page.*/
 	newpage->index = page->index;
 	newpage->mapping = page->mapping;
+	if (PageSwapBacked(page))
+		SetPageSwapBacked(newpage);
 
 	mapping = page_mapping(page);
 	if (!mapping)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ee7a96e..2099904 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -462,6 +462,8 @@
 		bad_page(page);
 	if (PageDirty(page))
 		__ClearPageDirty(page);
+	if (PageSwapBacked(page))
+		__ClearPageSwapBacked(page);
 	/*
 	 * For now, we report if PG_reserved was found set, but do not
 	 * clear it, and do not free the page.  But we shall soon need
diff --git a/mm/shmem.c b/mm/shmem.c
index d87958a..fd421ed 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1367,6 +1367,7 @@
 				error = -ENOMEM;
 				goto failed;
 			}
+			SetPageSwapBacked(filepage);
 
 			/* Precharge page while we can wait, compensate after */
 			error = mem_cgroup_cache_charge(filepage, current->mm,
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 797c383..7a3ece0 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -75,6 +75,7 @@
 	BUG_ON(!PageLocked(page));
 	BUG_ON(PageSwapCache(page));
 	BUG_ON(PagePrivate(page));
+	BUG_ON(!PageSwapBacked(page));
 	error = radix_tree_preload(gfp_mask);
 	if (!error) {
 		page_cache_get(page);
@@ -303,6 +304,7 @@
 		 * May fail (-ENOMEM) if radix-tree node allocation failed.
 		 */
 		set_page_locked(new_page);
+		SetPageSwapBacked(new_page);
 		err = add_to_swap_cache(new_page, entry, gfp_mask & GFP_KERNEL);
 		if (likely(!err)) {
 			/*
@@ -312,6 +314,7 @@
 			swap_readpage(NULL, new_page);
 			return new_page;
 		}
+		ClearPageSwapBacked(new_page);
 		clear_page_locked(new_page);
 		swap_free(entry);
 	} while (err != -ENOMEM);