linux-kernel - [PATCH 4/4] PM: Print wall time at hibernate entry and exit

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Date:   Tue, 18 Jul 2017 10:26:16 -0700
From:   Mark Salyzyn <salyzyn@...roid.com>
To:     linux-kernel@...r.kernel.org
Cc:     rjw@...ysocki.net, len.brown@...el.com, pavel@....cz,
        linux-pm@...r.kernel.org, a.zummo@...ertech.it,
        alexandre.belloni@...e-electrons.com, linux-rtc@...r.kernel.org,
        Mark Salyzyn <salyzyn@...roid.com>
Subject: [PATCH 4/4] PM: Print wall time at hibernate entry and exit

Permits power state and battery life diagnosis.

Feature activated by CONFIG_RTC_SHOW_TIME.

Signed-off-by: Mark Salyzyn <salyzyn@...roid.com>
---
 kernel/power/hibernate.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index e1914c7b85b1..0b5460f9189b 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -32,11 +32,11 @@
 #include <linux/ctype.h>
 #include <linux/genhd.h>
 #include <linux/ktime.h>
+#include <linux/rtc.h>
 #include <trace/events/power.h>
 
 #include "power.h"
 
-
 static int nocompress;
 static int noresume;
 static int nohibernate;
@@ -342,6 +342,7 @@ int hibernation_snapshot(int platform_mode)
 	pm_message_t msg;
 	int error;
 
+	rtc_show_time("PM: hibernation entry");
 	pm_suspend_clear_flags();
 	error = platform_begin(platform_mode);
 	if (error)
@@ -409,6 +410,7 @@ int hibernation_snapshot(int platform_mode)
 	thaw_kernel_threads();
  Cleanup:
 	swsusp_free();
+	rtc_show_time("PM: hibernation exit");
 	goto Close;
 }
 
-- 
2.13.2.932.g7449e964c-goog