Messages in this thread Patch in this message | | | Date | Thu, 12 Oct 2017 18:16:41 -0400 | From | Steven Rostedt <> | Subject | [PATCH] tracing, rcu: Hide trace event rcu_nocb_wake when not used |
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From: Steven Rostedt (VMware) <rostedt@goodmis.org>
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> --- Index: linux-trace.git/include/trace/events/rcu.h =================================================================== --- linux-trace.git.orig/include/trace/events/rcu.h +++ linux-trace.git/include/trace/events/rcu.h @@ -242,6 +242,7 @@ 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. @@ -284,6 +285,7 @@ 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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