diff --git a/[refs] b/[refs]
index 8fb76822ea92..ced098928fe7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1eb521210a8c9823038abe4ddfe8c69e713ec17d
+refs/heads/master: d5988af53102f3b73e5e0788be024ccfa51869de
diff --git a/trunk/Documentation/RCU/trace.txt b/trunk/Documentation/RCU/trace.txt
index 8173cec473aa..a67af0a39ded 100644
--- a/trunk/Documentation/RCU/trace.txt
+++ b/trunk/Documentation/RCU/trace.txt
@@ -184,10 +184,14 @@ o	"kt" is the per-CPU kernel-thread state.  The digit preceding
 	The number after the final slash is the CPU that the kthread
 	is actually running on.
 
+	This field is displayed only for CONFIG_RCU_BOOST kernels.
+
 o	"ktl" is the low-order 16 bits (in hexadecimal) of the count of
 	the number of times that this CPU's per-CPU kthread has gone
 	through its loop servicing invoke_rcu_cpu_kthread() requests.
 
+	This field is displayed only for CONFIG_RCU_BOOST kernels.
+
 o	"b" is the batch limit for this CPU.  If more than this number
 	of RCU callbacks is ready to invoke, then the remainder will
 	be deferred.