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>

1 files changed, 7 insertions, 0 deletions

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;
 }