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PM / QoS: Remove global notifiers

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They were never used in the kernel, so get rid of them.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
2017-02-22 13:58:52 +05:30
committed by Rafael J. Wysocki
parent e84b4a84e5
commit d08d1b27fe
3 changed files with 5 additions and 66 deletions
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50
drivers/base/power/qos.c
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@@ -17,12 +17,9 @@
*
* This QoS design is best effort based. Dependents register their QoS needs.
* Watchers register to keep track of the current QoS needs of the system.
* Watchers can register different types of notification callbacks:
* . a per-device notification callback using the dev_pm_qos_*_notifier API.
* The notification chain data is stored in the per-device constraint
* data struct.
* . a system-wide notification callback using the dev_pm_qos_*_global_notifier
* API. The notification chain data is stored in a static variable.
* Watchers can register a per-device notification callback using the
* dev_pm_qos_*_notifier API. The notification chain data is stored in the
* per-device constraint data struct.
*
* Note about the per-device constraint data struct allocation:
* . The per-device constraints data struct ptr is tored into the device
@@ -49,8 +46,6 @@
static DEFINE_MUTEX(dev_pm_qos_mtx);
static DEFINE_MUTEX(dev_pm_qos_sysfs_mtx);
static BLOCKING_NOTIFIER_HEAD(dev_pm_notifiers);
/**
* __dev_pm_qos_flags - Check PM QoS flags for a given device.
* @dev: Device to check the PM QoS flags for.
@@ -135,8 +130,7 @@ s32 dev_pm_qos_read_value(struct device *dev)
* @value: Value to assign to the QoS request.
*
* Internal function to update the constraints list using the PM QoS core
* code and if needed call the per-device and the global notification
* callbacks
* code and if needed call the per-device callbacks.
*/
static int apply_constraint(struct dev_pm_qos_request *req,
enum pm_qos_req_action action, s32 value)
@@ -148,12 +142,6 @@ static int apply_constraint(struct dev_pm_qos_request *req,
case DEV_PM_QOS_RESUME_LATENCY:
ret = pm_qos_update_target(&qos->resume_latency,
&req->data.pnode, action, value);
if (ret) {
value = pm_qos_read_value(&qos->resume_latency);
blocking_notifier_call_chain(&dev_pm_notifiers,
(unsigned long)value,
req);
}
break;
case DEV_PM_QOS_LATENCY_TOLERANCE:
ret = pm_qos_update_target(&qos->latency_tolerance,
@@ -535,36 +523,6 @@ int dev_pm_qos_remove_notifier(struct device *dev,
}
EXPORT_SYMBOL_GPL(dev_pm_qos_remove_notifier);
/**
* dev_pm_qos_add_global_notifier - sets notification entry for changes to
* target value of the PM QoS constraints for any device
*
* @notifier: notifier block managed by caller.
*
* Will register the notifier into a notification chain that gets called
* upon changes to the target value for any device.
*/
int dev_pm_qos_add_global_notifier(struct notifier_block *notifier)
{
return blocking_notifier_chain_register(&dev_pm_notifiers, notifier);
}
EXPORT_SYMBOL_GPL(dev_pm_qos_add_global_notifier);
/**
* dev_pm_qos_remove_global_notifier - deletes notification for changes to
* target value of PM QoS constraints for any device
*
* @notifier: notifier block to be removed.
*
* Will remove the notifier from the notification chain that gets called
* upon changes to the target value for any device.
*/
int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier)
{
return blocking_notifier_chain_unregister(&dev_pm_notifiers, notifier);
}
EXPORT_SYMBOL_GPL(dev_pm_qos_remove_global_notifier);
/**
* dev_pm_qos_add_ancestor_request - Add PM QoS request for device's ancestor.
* @dev: Device whose ancestor to add the request for.