Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index f0fc470..22af69d 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * pm_runtime.h - Device run-time power management helper functions.
  *
  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
- *
- * This file is released under the GPLv2.
  */
 
 #ifndef _LINUX_PM_RUNTIME_H
@@ -51,7 +50,7 @@
 extern void pm_runtime_irq_safe(struct device *dev);
 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
-extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
+extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
 extern void pm_runtime_update_max_time_suspended(struct device *dev,
 						 s64 delta_ns);
 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
@@ -105,7 +104,7 @@
 
 static inline void pm_runtime_mark_last_busy(struct device *dev)
 {
-	WRITE_ONCE(dev->power.last_busy, jiffies);
+	WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
 }
 
 static inline bool pm_runtime_is_irq_safe(struct device *dev)
@@ -113,6 +112,8 @@
 	return dev->power.irq_safe;
 }
 
+extern u64 pm_runtime_suspended_time(struct device *dev);
+
 #else /* !CONFIG_PM */
 
 static inline bool queue_pm_work(struct work_struct *work) { return false; }
@@ -168,7 +169,7 @@
 						bool use) {}
 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
 						int delay) {}
-static inline unsigned long pm_runtime_autosuspend_expiration(
+static inline u64 pm_runtime_autosuspend_expiration(
 				struct device *dev) { return 0; }
 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
 						bool enable){}