Commit 9122caf9 authored Oct 12, 2017 by Steven Rostedt (VMware) Committed by Paul E. McKenney Dec 11, 2017

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

parent d6331980

include/trace/events/rcu.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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