Commit-ID: 9122caf99b85c0f16938419547d5a9a84ae287a4
Gitweb: https://git.kernel.org/tip/9122caf99b85c0f16938419547d5a9a84ae287a4
Author: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
AuthorDate: Thu, 12 Oct 2017 18:16:41 -0400
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 11 Dec 2017 09:17:39 -0800
tracing, rcu: Hide trace event rcu_nocb_wake when not used
The trace event rcu_nocb_wake is only used when CONFIG_RCU_NOCB_CPU is
defined. But the trace event is defined regardless. As defined trace
events take up memory, it is a waste to have it defined when not used.
Surround the trace event with an #ifdef to have it only defined when it
is used.
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
include/trace/events/rcu.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index 59d40c4..dbca79e 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -243,6 +243,7 @@ TRACE_EVENT(rcu_exp_funnel_lock,
__entry->grphi, __entry->gpevent)
);
+#ifdef CONFIG_RCU_NOCB_CPU
/*
* Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
* to assist debugging of these handoffs.
@@ -285,6 +286,7 @@ TRACE_EVENT(rcu_nocb_wake,
TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason)
);
+#endif
/*
* Tracepoint for tasks blocking within preemptible-RCU read-side
--
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