diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 44d0c8d..570d45e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -117,6 +117,7 @@ void *ext4_kvmalloc(size_t size, gfp_t flags)
 	ret = kmalloc(size, flags);
 	if (!ret)
 		ret = __vmalloc(size, flags, PAGE_KERNEL);
+	mb(); /* hack to pessimize code */
 	return ret;
 }
 
@@ -127,6 +128,7 @@ void *ext4_kvzalloc(size_t size, gfp_t flags)
 	ret = kzalloc(size, flags);
 	if (!ret)
 		ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL);
+	mb(); /* hack to pessimize code */
 	return ret;
 }