1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index dd21ca47e4b4..46d61b597731 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -73,7 +73,7 @@ static void sync_exp_reset_tree_hotplug(struct rcu_state *rsp)
         unsigned long flags;
         unsigned long mask;
         unsigned long oldmask;
-        int ncpus = READ_ONCE(rsp->ncpus);
+        int ncpus = smp_load_acquire(&rsp->ncpus); /* Order against locking. */
         struct rcu_node *rnp;
         struct rcu_node *rnp_up;