diff mbox series

[v2,3/8] thermal: core: Add routines for locking and unlocking thermal zones

Message ID 2167475.irdbgypaU6@kreacher
State Superseded
Headers show
Series [v2,1/8] thermal: core: Add mechanism for connecting trips with driver data | expand

Commit Message

Rafael J. Wysocki July 21, 2023, 12:50 p.m. UTC 
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add thermal_zone_device_lock() and thermal_zone_device_unlock() for
acquiring and releasing the thermal zone lock, respectively.

They will be used by the ACPI thermal driver to protect trip point
temperature updates against races with accesses from elsewhere.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v1 -> v2: New patch.

---
 drivers/thermal/thermal_core.c |   13 +++++++++++++
 include/linux/thermal.h        |    2 ++
 2 files changed, 15 insertions(+)
diff mbox series

Patch

Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -497,6 +498,18 @@  void thermal_zone_device_update(struct t
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_update);
 
+void thermal_zone_device_lock(struct thermal_zone_device *tz)
+{
+	mutex_lock(&tz->lock);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_lock);
+
+void thermal_zone_device_unlock(struct thermal_zone_device *tz)
+{
+	mutex_unlock(&tz->lock);
+}
+EXPORT_SYMBOL_GPL(thermal_zone_device_unlock);
+
 static void thermal_zone_device_check(struct work_struct *work)
 {
 	struct thermal_zone_device *tz = container_of(work, struct
Index: linux-pm/include/linux/thermal.h
===================================================================
--- linux-pm.orig/include/linux/thermal.h
+++ linux-pm/include/linux/thermal.h
@@ -336,6 +336,8 @@  int thermal_zone_unbind_cooling_device(s
 				       struct thermal_cooling_device *);
 void thermal_zone_device_update(struct thermal_zone_device *,
 				enum thermal_notify_event);
+void thermal_zone_device_lock(struct thermal_zone_device *tz);
+void thermal_zone_device_unlock(struct thermal_zone_device *tz);
 
 struct thermal_cooling_device *thermal_cooling_device_register(const char *,
 		void *, const struct thermal_cooling_device_ops *);