From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Sun, 10 Feb 2013 01:42:16 +0000 (-0800)
Subject: rcu: Add event tracing for no-CBs CPUs' callback registration
X-Git-Tag: firefly_0821_release~3680^2~470^2~3^2~1^3~11
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=21e7a6087480451804124cee27c0a7d0a7de1564;p=firefly-linux-kernel-4.4.55.git

rcu: Add event tracing for no-CBs CPUs' callback registration

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 90a191452550..7225a5a14cef 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -2285,6 +2285,13 @@ static bool __call_rcu_nocb(struct rcu_data *rdp, struct rcu_head *rhp,
 	if (!is_nocb_cpu(rdp->cpu))
 		return 0;
 	__call_rcu_nocb_enqueue(rdp, rhp, &rhp->next, 1, lazy);
+	if (__is_kfree_rcu_offset((unsigned long)rhp->func))
+		trace_rcu_kfree_callback(rdp->rsp->name, rhp,
+					 (unsigned long)rhp->func,
+					 rdp->qlen_lazy, rdp->qlen);
+	else
+		trace_rcu_callback(rdp->rsp->name, rhp,
+				   rdp->qlen_lazy, rdp->qlen);
 	return 1;
 }