summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--kernel/rcu/tree.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 81aa1cdc6bc9..bd2605c144cc 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3822,6 +3822,10 @@ void synchronize_sched_expedited(void)
struct rcu_node *rnp;
struct rcu_state *rsp = &rcu_sched_state;
+ /* If only one CPU, this is automatically a grace period. */
+ if (rcu_blocking_is_gp())
+ return;
+
/* Take a snapshot of the sequence number. */
s = rcu_exp_gp_seq_snap(rsp);