diff --git a/mm/vmscan.c b/mm/vmscan.c
index ba4e87d..d9a0e0d 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -262,27 +262,6 @@
 	return ret;
 }
 
-/* Called without lock on whether page is mapped, so answer is unstable */
-static inline int page_mapping_inuse(struct page *page)
-{
-	struct address_space *mapping;
-
-	/* Page is in somebody's page tables. */
-	if (page_mapped(page))
-		return 1;
-
-	/* Be more reluctant to reclaim swapcache than pagecache */
-	if (PageSwapCache(page))
-		return 1;
-
-	mapping = page_mapping(page);
-	if (!mapping)
-		return 0;
-
-	/* File is mmap'd by somebody? */
-	return mapping_mapped(mapping);
-}
-
 static inline int is_page_cache_freeable(struct page *page)
 {
 	/*
@@ -606,7 +585,7 @@
 	if (vm_flags & VM_LOCKED)
 		return PAGEREF_RECLAIM;
 
-	if (page_mapping_inuse(page))
+	if (page_mapped(page))
 		return PAGEREF_ACTIVATE;
 
 	/* Reclaim if clean, defer dirty pages to writeback */
@@ -1381,7 +1360,7 @@
 		}
 
 		/* page_referenced clears PageReferenced */
-		if (page_mapping_inuse(page) &&
+		if (page_mapped(page) &&
 		    page_referenced(page, 0, sc->mem_cgroup, &vm_flags)) {
 			nr_rotated++;
 			/*