diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 42a0032dd99f..381ebd3ae26c 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -251,6 +251,15 @@ void rcu_softirq_qs(void)
 	rcu_tasks_qs(current, false);
 }
 
+/*
+ * Increment the current CPU's rcu_data structure's ->dynticks field
+ * with ordering.  Return the new value.
+ */
+static noinline noinstr unsigned long rcu_dynticks_inc(int incby)
+{
+	return arch_atomic_add_return(incby, this_cpu_ptr(&rcu_data.dynticks));
+}
+
 /*
  * Record entry into an extended quiescent state.  This is only to be
  * called when not already in an extended quiescent state, that is,
@@ -267,7 +276,7 @@ static noinstr void rcu_dynticks_eqs_enter(void)
 	 * next idle sojourn.
 	 */
 	rcu_dynticks_task_trace_enter();  // Before ->dynticks update!
-	seq = arch_atomic_inc_return(&this_cpu_ptr(&rcu_data)->dynticks);
+	seq = rcu_dynticks_inc(1);
 	// RCU is no longer watching.  Better be in extended quiescent state!
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && (seq & 0x1));
 }
@@ -286,7 +295,7 @@ static noinstr void rcu_dynticks_eqs_exit(void)
 	 * and we also must force ordering with the next RCU read-side
 	 * critical section.
 	 */
-	seq = arch_atomic_inc_return(&this_cpu_ptr(&rcu_data)->dynticks);
+	seq = rcu_dynticks_inc(1);
 	// RCU is now watching.  Better not be in an extended quiescent state!
 	rcu_dynticks_task_trace_exit();  // After ->dynticks update!
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_RCU_EQS_DEBUG) && !(seq & 0x1));
@@ -308,7 +317,7 @@ static void rcu_dynticks_eqs_online(void)
 
 	if (atomic_read(&rdp->dynticks) & 0x1)
 		return;
-	atomic_inc(&rdp->dynticks);
+	rcu_dynticks_inc(1);
 }
 
 /*
@@ -318,7 +327,7 @@ static void rcu_dynticks_eqs_online(void)
  */
 static __always_inline bool rcu_dynticks_curr_cpu_in_eqs(void)
 {
-	return !(arch_atomic_read(&this_cpu_ptr(&rcu_data)->dynticks) & 0x1);
+	return !(atomic_read(this_cpu_ptr(&rcu_data.dynticks)) & 0x1);
 }
 
 /*
@@ -327,7 +336,8 @@ static __always_inline bool rcu_dynticks_curr_cpu_in_eqs(void)
  */
 static int rcu_dynticks_snap(struct rcu_data *rdp)
 {
-	return atomic_add_return(0, &rdp->dynticks);
+	smp_mb();  // Fundamental RCU ordering guarantee.
+	return atomic_read_acquire(&rdp->dynticks);
 }
 
 /*
@@ -391,12 +401,12 @@ bool rcu_dynticks_zero_in_eqs(int cpu, int *vp)
  */
 notrace void rcu_momentary_dyntick_idle(void)
 {
-	int special;
+	int seq;
 
 	raw_cpu_write(rcu_data.rcu_need_heavy_qs, false);
-	special = atomic_add_return(2, &this_cpu_ptr(&rcu_data)->dynticks);
+	seq = rcu_dynticks_inc(2);
 	/* It is illegal to call this from idle state. */
-	WARN_ON_ONCE(!(special & 0x1));
+	WARN_ON_ONCE(!(seq & 0x1));
 	rcu_preempt_deferred_qs(current);
 }
 EXPORT_SYMBOL_GPL(rcu_momentary_dyntick_idle);