diff --git a/[refs] b/[refs]
index 9a7ff74263c2..4891d4d54026 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c69d48540c201394d08cb4d48b905e001313d9b8
+refs/heads/master: 9eb55b030c4b3227334ee4482402096cd1d1a6fe
diff --git a/trunk/block/blk-core.c b/trunk/block/blk-core.c
index 1e3b97f0ae6e..394c5bd81271 100644
--- a/trunk/block/blk-core.c
+++ b/trunk/block/blk-core.c
@@ -2097,6 +2097,9 @@ EXPORT_SYMBOL(kblockd_schedule_work);
 
 int __init blk_dev_init(void)
 {
+	BUILD_BUG_ON(__REQ_NR_BITS > 8 *
+			sizeof(((struct request *)0)->cmd_flags));
+
 	kblockd_workqueue = create_workqueue("kblockd");
 	if (!kblockd_workqueue)
 		panic("Failed to create kblockd\n");