diff --git a/mm/ksm.c b/mm/ksm.c
index 62feb478a367349235e6d2131c6f26d1c4a667de..21bb3e7cf3bc73d60fac20872b05cef7b0ce957d 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2727,8 +2727,8 @@ struct page *ksm_might_need_to_copy(struct page *page,
 			return page;	/* no need to copy it */
 	} else if (!anon_vma) {
 		return page;		/* no need to copy it */
-	} else if (anon_vma->root == vma->anon_vma->root &&
-		 page->index == linear_page_index(vma, address)) {
+	} else if (page->index == linear_page_index(vma, address) &&
+			anon_vma->root == vma->anon_vma->root) {
 		return page;		/* still no need to copy it */
 	}
 	if (!PageUptodate(page))