diff --git a/[refs] b/[refs]
index 58571ae5c6a6..9f1f37812f03 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 473b0ce4d13ee77925a7062e25dea0d16a91f654
+refs/heads/master: 26465d3ea5a62d59efb3796b9e0e2b0656d02cb1
diff --git a/trunk/mm/ksm.c b/trunk/mm/ksm.c
index 9f8f0523562b..81f692e836db 100644
--- a/trunk/mm/ksm.c
+++ b/trunk/mm/ksm.c
@@ -1268,6 +1268,14 @@ static void ksm_do_scan(unsigned int scan_npages)
 			return;
 		if (!PageKsm(page) || !in_stable_tree(rmap_item))
 			cmp_and_merge_page(page, rmap_item);
+		else if (page_mapcount(page) == 1) {
+			/*
+			 * Replace now-unshared ksm page by ordinary page.
+			 */
+			break_cow(rmap_item->mm, rmap_item->address);
+			remove_rmap_item_from_tree(rmap_item);
+			rmap_item->oldchecksum = calc_checksum(page);
+		}
 		put_page(page);
 	}
 }