Message ID | 1437616850-23266-27-git-send-email-kamal@canonical.com |
---|---|
State | New |
Headers | show |
diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c index 1254f31..ae359f0 100644 --- a/kernel/rcu/tiny.c +++ b/kernel/rcu/tiny.c @@ -284,6 +284,11 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp) /* Move the ready-to-invoke callbacks to a local list. */ local_irq_save(flags); + if (rcp->donetail == &rcp->rcucblist) { + /* No callbacks ready, so just leave. */ + local_irq_restore(flags); + return; + } RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, rcp->qlen, -1)); list = rcp->rcucblist; rcp->rcucblist = *rcp->donetail;