X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=kernel%2Frcupreempt.c;h=5d59e850fb71f6f58b854cdbd0a1f1792f59c8ad;hb=b54fc8dd2c43888f2754505cca2b6e88604a8ffa;hp=33cfc50781f9968d06e79edcb93049441a2a4231;hpb=a0c9f240a992c4c2b6ac40324ece27475cf3b71a;p=mv-sheeva.git

diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index 33cfc50781f..5d59e850fb7 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -1181,6 +1181,9 @@ void __synchronize_sched(void)
 {
 	struct rcu_synchronize rcu;
 
+	if (num_online_cpus() == 1)
+		return;  /* blocking is gp if only one CPU! */
+
 	init_completion(&rcu.completion);
 	/* Will wake me after RCU finished. */
 	call_rcu_sched(&rcu.head, wakeme_after_rcu);