diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 44609c3..d39ad5c 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -176,8 +176,6 @@
 {
 	struct rcu_data *rdp = &per_cpu(rcu_sched_data, cpu);
 
-	rdp->passed_quiesce_gpnum = rdp->gpnum;
-	barrier();
 	if (rdp->passed_quiesce == 0)
 		trace_rcu_grace_period("rcu_sched", rdp->gpnum, "cpuqs");
 	rdp->passed_quiesce = 1;
@@ -187,8 +185,6 @@
 {
 	struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu);
 
-	rdp->passed_quiesce_gpnum = rdp->gpnum;
-	barrier();
 	if (rdp->passed_quiesce == 0)
 		trace_rcu_grace_period("rcu_bh", rdp->gpnum, "cpuqs");
 	rdp->passed_quiesce = 1;
@@ -897,12 +893,8 @@
 		 */
 		rdp->gpnum = rnp->gpnum;
 		trace_rcu_grace_period(rsp->name, rdp->gpnum, "cpustart");
-		if (rnp->qsmask & rdp->grpmask) {
-			rdp->qs_pending = 1;
-			rdp->passed_quiesce = 0;
-		} else {
-			rdp->qs_pending = 0;
-		}
+		rdp->passed_quiesce = 0;
+		rdp->qs_pending = !!(rnp->qsmask & rdp->grpmask);
 		zero_cpu_stall_ticks(rdp);
 	}
 }
@@ -982,10 +974,13 @@
 		 * our behalf. Catch up with this state to avoid noting
 		 * spurious new grace periods.  If another grace period
 		 * has started, then rnp->gpnum will have advanced, so
-		 * we will detect this later on.
+		 * we will detect this later on.  Of course, any quiescent
+		 * states we found for the old GP are now invalid.
 		 */
-		if (ULONG_CMP_LT(rdp->gpnum, rdp->completed))
+		if (ULONG_CMP_LT(rdp->gpnum, rdp->completed)) {
 			rdp->gpnum = rdp->completed;
+			rdp->passed_quiesce = 0;
+		}
 
 		/*
 		 * If RCU does not need a quiescent state from this CPU,
@@ -1357,7 +1352,7 @@
  * based on quiescent states detected in an earlier grace period!
  */
 static void
-rcu_report_qs_rdp(int cpu, struct rcu_state *rsp, struct rcu_data *rdp, long lastgp)
+rcu_report_qs_rdp(int cpu, struct rcu_state *rsp, struct rcu_data *rdp)
 {
 	unsigned long flags;
 	unsigned long mask;
@@ -1365,7 +1360,8 @@
 
 	rnp = rdp->mynode;
 	raw_spin_lock_irqsave(&rnp->lock, flags);
-	if (lastgp != rnp->gpnum || rnp->completed == rnp->gpnum) {
+	if (rdp->passed_quiesce == 0 || rdp->gpnum != rnp->gpnum ||
+	    rnp->completed == rnp->gpnum) {
 
 		/*
 		 * The grace period in which this quiescent state was
@@ -1424,7 +1420,7 @@
 	 * Tell RCU we are done (but rcu_report_qs_rdp() will be the
 	 * judge of that).
 	 */
-	rcu_report_qs_rdp(rdp->cpu, rsp, rdp, rdp->passed_quiesce_gpnum);
+	rcu_report_qs_rdp(rdp->cpu, rsp, rdp);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -2599,7 +2595,6 @@
 			rdp->completed = rnp->completed;
 			rdp->passed_quiesce = 0;
 			rdp->qs_pending = 0;
-			rdp->passed_quiesce_gpnum = rnp->gpnum - 1;
 			trace_rcu_grace_period(rsp->name, rdp->gpnum, "cpuonl");
 		}
 		raw_spin_unlock(&rnp->lock); /* irqs already disabled. */
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 8f0293c..935dd4c 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -246,8 +246,6 @@
 					/*  in order to detect GP end. */
 	unsigned long	gpnum;		/* Highest gp number that this CPU */
 					/*  is aware of having started. */
-	unsigned long	passed_quiesce_gpnum;
-					/* gpnum at time of quiescent state. */
 	bool		passed_quiesce;	/* User-mode/idle loop etc. */
 	bool		qs_pending;	/* Core waits for quiesc state. */
 	bool		beenonline;	/* CPU online at least once. */
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index c92004f..c36fe50 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -137,8 +137,6 @@
 {
 	struct rcu_data *rdp = &per_cpu(rcu_preempt_data, cpu);
 
-	rdp->passed_quiesce_gpnum = rdp->gpnum;
-	barrier();
 	if (rdp->passed_quiesce == 0)
 		trace_rcu_grace_period("rcu_preempt", rdp->gpnum, "cpuqs");
 	rdp->passed_quiesce = 1;
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index f54f0ce..bd4df13 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -86,12 +86,11 @@
 {
 	if (!rdp->beenonline)
 		return;
-	seq_printf(m, "%3d%cc=%lu g=%lu pq=%d pgp=%lu qp=%d",
+	seq_printf(m, "%3d%cc=%lu g=%lu pq=%d qp=%d",
 		   rdp->cpu,
 		   cpu_is_offline(rdp->cpu) ? '!' : ' ',
 		   rdp->completed, rdp->gpnum,
-		   rdp->passed_quiesce, rdp->passed_quiesce_gpnum,
-		   rdp->qs_pending);
+		   rdp->passed_quiesce, rdp->qs_pending);
 	seq_printf(m, " dt=%d/%llx/%d df=%lu",
 		   atomic_read(&rdp->dynticks->dynticks),
 		   rdp->dynticks->dynticks_nesting,
@@ -150,12 +149,11 @@
 {
 	if (!rdp->beenonline)
 		return;
-	seq_printf(m, "%d,%s,%lu,%lu,%d,%lu,%d",
+	seq_printf(m, "%d,%s,%lu,%lu,%d,%d",
 		   rdp->cpu,
 		   cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"",
 		   rdp->completed, rdp->gpnum,
-		   rdp->passed_quiesce, rdp->passed_quiesce_gpnum,
-		   rdp->qs_pending);
+		   rdp->passed_quiesce, rdp->qs_pending);
 	seq_printf(m, ",%d,%llx,%d,%lu",
 		   atomic_read(&rdp->dynticks->dynticks),
 		   rdp->dynticks->dynticks_nesting,
@@ -186,7 +184,7 @@
 	int cpu;
 	struct rcu_state *rsp;
 
-	seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pgp\",\"pq\",");
+	seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pq\",");
 	seq_puts(m, "\"dt\",\"dt nesting\",\"dt NMI nesting\",\"df\",");
 	seq_puts(m, "\"of\",\"qll\",\"ql\",\"qs\"");
 #ifdef CONFIG_RCU_BOOST