linux-kernel - [PATCH 2/4] PM: tracing: Hide psci_domain_idle events under ARM_PSCI

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Message-ID: <20250612145408.074769245@goodmis.org>
Date: Thu, 12 Jun 2025 10:53:12 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>,
 Viresh Kumar <viresh.kumar@...aro.org>,
 Madhavan Srinivasan <maddy@...ux.ibm.com>,
 Michael Ellerman <mpe@...erman.id.au>
Subject: [PATCH 2/4] PM: tracing: Hide psci_domain_idle events under ARM_PSCI_CPUIDLE

From: Steven Rostedt <rostedt@...dmis.org>

The events psci_domain_idle_enter and psci_domain_idle_exit events are
only called when CONFIG_ARM_PSCI_CPUIDLE is defined. As each event can
take up to 5K (less for DEFINE_EVENT()) regardless if they are used or
not, it's best not to define them when they are not used. Add #ifdef
around these events when they are not used.

Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 include/trace/events/power.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 913181cebfe9..a10ad300d660 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -62,6 +62,7 @@ TRACE_EVENT(cpu_idle_miss,
 		(unsigned long)__entry->state, (__entry->below)?"below":"above")
 );

+#ifdef CONFIG_ARM_PSCI_CPUIDLE
 DECLARE_EVENT_CLASS(psci_domain_idle,

 	TP_PROTO(unsigned int cpu_id, unsigned int state, bool s2idle),
@@ -98,6 +99,7 @@ DEFINE_EVENT(psci_domain_idle, psci_domain_idle_exit,

 	TP_ARGS(cpu_id, state, s2idle)
 );
+#endif

 TRACE_EVENT(pstate_sample,

-- 
2.47.2