1 files changed, 7 insertions, 2 deletions

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index b1b485111321..15d28febbbd4 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -588,10 +588,15 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp,
         rnp->exp_tasks = NULL;
 #ifdef CONFIG_RCU_BOOST
         rnp->boost_tasks = NULL;
-        /* In case root is being boosted and leaf was not. */
+        /*
+         * In case root is being boosted and leaf was not.  Make sure
+         * that we boost the tasks blocking the current grace period
+         * in this case.
+         */
         raw_spin_lock(&rnp_root->lock); /* irqs already disabled */
         if (rnp_root->boost_tasks != NULL &&
-            rnp_root->boost_tasks != rnp_root->gp_tasks)
+            rnp_root->boost_tasks != rnp_root->gp_tasks &&
+            rnp_root->boost_tasks != rnp_root->exp_tasks)
                 rnp_root->boost_tasks = rnp_root->gp_tasks;
         raw_spin_unlock(&rnp_root->lock); /* irqs still disabled */
 #endif /* #ifdef CONFIG_RCU_BOOST */