linux-kernel - [PATCH 1/3] perf: add calls to suspend trace point

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Date:	Tue,  4 Jan 2011 11:48:29 +0100
From:	jean.pihet@...oldbits.com
To:	mingo@...e.hu, trenn@...e.de, Len Brown <len.brown@...el.com>,
	Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc:	linux-omap@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-perf-users@...r.kernel.org, Jean Pihet <j-pihet@...com>
Subject: [PATCH 1/3] perf: add calls to suspend trace point

From: Jean Pihet <j-pihet@...com>

Uses the machine_suspend trace point, called from the
generic kernel suspend_enter function.

Signed-off-by: Jean Pihet <j-pihet@...com>
CC: Thomas Renninger <trenn@...e.de>
---
 kernel/power/suspend.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index ecf7705..0650596 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -22,6 +22,7 @@
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/suspend.h>
+#include <trace/events/power.h>
 
 #include "power.h"
 
@@ -164,7 +165,9 @@ static int suspend_enter(suspend_state_t state)
 	error = sysdev_suspend(PMSG_SUSPEND);
 	if (!error) {
 		if (!suspend_test(TEST_CORE) && pm_check_wakeup_events()) {
+			trace_machine_suspend(state);
 			error = suspend_ops->enter(state);
+			trace_machine_suspend(PWR_EVENT_EXIT);
 			events_check_enabled = false;
 		}
 		sysdev_resume();
-- 
1.7.2.3

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