linux-kernel - [PATCH 5/6] PM / sleep: Print timing information if debug is enabled

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Date:   Thu, 08 Jun 2017 02:05:09 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     Linux PCI <linux-pci@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Linux USB <linux-usb@...r.kernel.org>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Felipe Balbi <balbi@...nel.org>,
        Mario Limonciello <mario_limonciello@...l.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Hans De Goede <hdegoede@...hat.com>
Subject: [PATCH 5/6] PM / sleep: Print timing information if debug is enabled

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Avoid printing the device suspend/resume timing information if
CONFIG_PM_DEBUG is not set to reduce the log noise level.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/base/power/main.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-pm/drivers/base/power/main.c
===================================================================
--- linux-pm.orig/drivers/base/power/main.c
+++ linux-pm/drivers/base/power/main.c
@@ -417,6 +417,7 @@ static void pm_dev_err(struct device *de
 		dev_name(dev), pm_verb(state.event), info, error);
 }
 
+#ifdef CONFIG_PM_DEBUG
 static void dpm_show_time(ktime_t starttime, pm_message_t state, char *info)
 {
 	ktime_t calltime;
@@ -433,6 +434,9 @@ static void dpm_show_time(ktime_t startt
 		info ?: "", info ? " " : "", pm_verb(state.event),
 		usecs / USEC_PER_MSEC, usecs % USEC_PER_MSEC);
 }
+#else
+static inline void dpm_show_time(ktime_t starttime, pm_message_t state, char *info) {}
+#endif /* CONFIG_PM_DEBUG */
 
 static int dpm_run_callback(pm_callback_t cb, struct device *dev,
 			    pm_message_t state, char *info)