PM / OPP: Relocate few routines

In order to prepare for the later commits, this relocates few routines
towards the top as they will be used earlier in the code.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 677fb28..8c3fd57 100644 (file)
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -438,6 +438,102 @@ static struct device_opp *_add_device_opp(struct device *dev)
 }
 
 /**
+ * _kfree_device_rcu() - Free device_opp RCU handler
+ * @head:      RCU head
+ */
+static void _kfree_device_rcu(struct rcu_head *head)
+{
+       struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
+
+       kfree_rcu(device_opp, rcu_head);
+}
+
+/**
+ * _kfree_opp_rcu() - Free OPP RCU handler
+ * @head:      RCU head
+ */
+static void _kfree_opp_rcu(struct rcu_head *head)
+{
+       struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
+
+       kfree_rcu(opp, rcu_head);
+}
+
+/**
+ * _opp_remove()  - Remove an OPP from a table definition
+ * @dev_opp:   points back to the device_opp struct this opp belongs to
+ * @opp:       pointer to the OPP to remove
+ *
+ * This function removes an opp definition from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * It is assumed that the caller holds required mutex for an RCU updater
+ * strategy.
+ */
+static void _opp_remove(struct device_opp *dev_opp,
+                       struct dev_pm_opp *opp)
+{
+       /*
+        * Notify the changes in the availability of the operable
+        * frequency/voltage list.
+        */
+       srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
+       list_del_rcu(&opp->node);
+       call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
+
+       if (list_empty(&dev_opp->opp_list)) {
+               list_del_rcu(&dev_opp->node);
+               call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
+                         _kfree_device_rcu);
+       }
+}
+
+/**
+ * dev_pm_opp_remove()  - Remove an OPP from OPP list
+ * @dev:       device for which we do this operation
+ * @freq:      OPP to remove with matching 'freq'
+ *
+ * This function removes an opp from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_remove(struct device *dev, unsigned long freq)
+{
+       struct dev_pm_opp *opp;
+       struct device_opp *dev_opp;
+       bool found = false;
+
+       /* Hold our list modification lock here */
+       mutex_lock(&dev_opp_list_lock);
+
+       dev_opp = _find_device_opp(dev);
+       if (IS_ERR(dev_opp))
+               goto unlock;
+
+       list_for_each_entry(opp, &dev_opp->opp_list, node) {
+               if (opp->rate == freq) {
+                       found = true;
+                       break;
+               }
+       }
+
+       if (!found) {
+               dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
+                        __func__, freq);
+               goto unlock;
+       }
+
+       _opp_remove(dev_opp, opp);
+unlock:
+       mutex_unlock(&dev_opp_list_lock);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
+
+/**
  * _opp_add_dynamic() - Allocate a dynamic OPP.
  * @dev:       device for which we do this operation
  * @freq:      Frequency in Hz for this OPP
@@ -570,102 +666,6 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 EXPORT_SYMBOL_GPL(dev_pm_opp_add);
 
 /**
- * _kfree_opp_rcu() - Free OPP RCU handler
- * @head:      RCU head
- */
-static void _kfree_opp_rcu(struct rcu_head *head)
-{
-       struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
-
-       kfree_rcu(opp, rcu_head);
-}
-
-/**
- * _kfree_device_rcu() - Free device_opp RCU handler
- * @head:      RCU head
- */
-static void _kfree_device_rcu(struct rcu_head *head)
-{
-       struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
-
-       kfree_rcu(device_opp, rcu_head);
-}
-
-/**
- * _opp_remove()  - Remove an OPP from a table definition
- * @dev_opp:   points back to the device_opp struct this opp belongs to
- * @opp:       pointer to the OPP to remove
- *
- * This function removes an opp definition from the opp list.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * It is assumed that the caller holds required mutex for an RCU updater
- * strategy.
- */
-static void _opp_remove(struct device_opp *dev_opp,
-                       struct dev_pm_opp *opp)
-{
-       /*
-        * Notify the changes in the availability of the operable
-        * frequency/voltage list.
-        */
-       srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
-       list_del_rcu(&opp->node);
-       call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
-
-       if (list_empty(&dev_opp->opp_list)) {
-               list_del_rcu(&dev_opp->node);
-               call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
-                         _kfree_device_rcu);
-       }
-}
-
-/**
- * dev_pm_opp_remove()  - Remove an OPP from OPP list
- * @dev:       device for which we do this operation
- * @freq:      OPP to remove with matching 'freq'
- *
- * This function removes an opp from the opp list.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function internally uses RCU updater strategy with mutex locks
- * to keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex cannot be locked.
- */
-void dev_pm_opp_remove(struct device *dev, unsigned long freq)
-{
-       struct dev_pm_opp *opp;
-       struct device_opp *dev_opp;
-       bool found = false;
-
-       /* Hold our list modification lock here */
-       mutex_lock(&dev_opp_list_lock);
-
-       dev_opp = _find_device_opp(dev);
-       if (IS_ERR(dev_opp))
-               goto unlock;
-
-       list_for_each_entry(opp, &dev_opp->opp_list, node) {
-               if (opp->rate == freq) {
-                       found = true;
-                       break;
-               }
-       }
-
-       if (!found) {
-               dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
-                        __func__, freq);
-               goto unlock;
-       }
-
-       _opp_remove(dev_opp, opp);
-unlock:
-       mutex_unlock(&dev_opp_list_lock);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
-
-/**
  * _opp_set_availability() - helper to set the availability of an opp
  * @dev:               device for which we do this operation
  * @freq:              OPP frequency to modify availability
@@ -825,6 +825,49 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
 
 #ifdef CONFIG_OF
 /**
+ * of_free_opp_table() - Free OPP table entries created from static DT entries
+ * @dev:       device pointer used to lookup device OPPs.
+ *
+ * Free OPPs created using static entries present in DT.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void of_free_opp_table(struct device *dev)
+{
+       struct device_opp *dev_opp;
+       struct dev_pm_opp *opp, *tmp;
+
+       /* Check for existing list for 'dev' */
+       dev_opp = _find_device_opp(dev);
+       if (IS_ERR(dev_opp)) {
+               int error = PTR_ERR(dev_opp);
+
+               if (error != -ENODEV)
+                       WARN(1, "%s: dev_opp: %d\n",
+                            IS_ERR_OR_NULL(dev) ?
+                                       "Invalid device" : dev_name(dev),
+                            error);
+               return;
+       }
+
+       /* Hold our list modification lock here */
+       mutex_lock(&dev_opp_list_lock);
+
+       /* Free static OPPs */
+       list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
+               if (!opp->dynamic)
+                       _opp_remove(dev_opp, opp);
+       }
+
+       mutex_unlock(&dev_opp_list_lock);
+}
+EXPORT_SYMBOL_GPL(of_free_opp_table);
+
+/**
  * of_init_opp_table() - Initialize opp table from device tree
  * @dev:       device pointer used to lookup device OPPs.
  *
@@ -882,46 +925,4 @@ int of_init_opp_table(struct device *dev)
        return 0;
 }
 EXPORT_SYMBOL_GPL(of_init_opp_table);
-
-/**
- * of_free_opp_table() - Free OPP table entries created from static DT entries
- * @dev:       device pointer used to lookup device OPPs.
- *
- * Free OPPs created using static entries present in DT.
- *
- * Locking: The internal device_opp and opp structures are RCU protected.
- * Hence this function indirectly uses RCU updater strategy with mutex locks
- * to keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex cannot be locked.
- */
-void of_free_opp_table(struct device *dev)
-{
-       struct device_opp *dev_opp;
-       struct dev_pm_opp *opp, *tmp;
-
-       /* Check for existing list for 'dev' */
-       dev_opp = _find_device_opp(dev);
-       if (IS_ERR(dev_opp)) {
-               int error = PTR_ERR(dev_opp);
-               if (error != -ENODEV)
-                       WARN(1, "%s: dev_opp: %d\n",
-                            IS_ERR_OR_NULL(dev) ?
-                                       "Invalid device" : dev_name(dev),
-                            error);
-               return;
-       }
-
-       /* Hold our list modification lock here */
-       mutex_lock(&dev_opp_list_lock);
-
-       /* Free static OPPs */
-       list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
-               if (!opp->dynamic)
-                       _opp_remove(dev_opp, opp);
-       }
-
-       mutex_unlock(&dev_opp_list_lock);
-}
-EXPORT_SYMBOL_GPL(of_free_opp_table);
 #endif