PM: runtime: Convert pm_runtime_blocked() to static inline

The comment in pm_runtime_blocked() is acutally wrong: power.last_status
is not a bit field.  Its data type is an enum and so one can reasonably
assume that partial updates of it will not be observed.

Accordingly, pm_runtime_blocked() can be converted to a static inline
function and the related locking overhead can be eliminated, so long
as it is only used in system suspend/resume code paths because
power.last_status is not expected to be updated concurrently while
that code is running.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://patch.msgid.link/1923449.tdWV9SEqCh@rjwysocki.net

1 files changed, 0 insertions, 17 deletions

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 3d08eb677177..42a58ed45a08 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1560,23 +1560,6 @@ out:
 }
 EXPORT_SYMBOL_GPL(pm_runtime_enable);
 
-bool pm_runtime_blocked(struct device *dev)
-{
-	bool ret;
-
-	/*
-	 * dev->power.last_status is a bit field, so in case it is updated via
-	 * RMW, read it under the spin lock.
-	 */
-	spin_lock_irq(&dev->power.lock);
-
-	ret = dev->power.last_status == RPM_BLOCKED;
-
-	spin_unlock_irq(&dev->power.lock);
-
-	return ret;
-}
-
 static void pm_runtime_disable_action(void *data)
 {
 	pm_runtime_dont_use_autosuspend(data);