PM QoS: Minor clean-ups
- Misc fixes to improve code readability:
* rename struct pm_qos_request_list to struct pm_qos_request,
* rename pm_qos_req parameter to req in internal code,
consistenly use req in the API parameters,
* update the in-kernel API callers to the new parameters names,
* rename of fields names (requests, list, node, constraints)
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: markgross <markgross@thegnar.org>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 61b4738..aa52c44 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -45,7 +45,7 @@
#include <linux/uaccess.h>
/*
- * locking rule: all changes to requests or notifiers lists
+ * locking rule: all changes to constraints or notifiers lists
* or pm_qos_object list and pm_qos_objects need to happen with pm_qos_lock
* held, taken with _irqsave. One lock to rule them all
*/
@@ -60,7 +60,7 @@
* types linux supports for 32 bit quantites
*/
struct pm_qos_object {
- struct plist_head requests;
+ struct plist_head constraints;
struct blocking_notifier_head *notifiers;
struct miscdevice pm_qos_power_miscdev;
char *name;
@@ -74,7 +74,7 @@
static struct pm_qos_object null_pm_qos;
static BLOCKING_NOTIFIER_HEAD(cpu_dma_lat_notifier);
static struct pm_qos_object cpu_dma_pm_qos = {
- .requests = PLIST_HEAD_INIT(cpu_dma_pm_qos.requests),
+ .constraints = PLIST_HEAD_INIT(cpu_dma_pm_qos.constraints),
.notifiers = &cpu_dma_lat_notifier,
.name = "cpu_dma_latency",
.target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
@@ -84,7 +84,7 @@
static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
static struct pm_qos_object network_lat_pm_qos = {
- .requests = PLIST_HEAD_INIT(network_lat_pm_qos.requests),
+ .constraints = PLIST_HEAD_INIT(network_lat_pm_qos.constraints),
.notifiers = &network_lat_notifier,
.name = "network_latency",
.target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
@@ -95,7 +95,7 @@
static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
static struct pm_qos_object network_throughput_pm_qos = {
- .requests = PLIST_HEAD_INIT(network_throughput_pm_qos.requests),
+ .constraints = PLIST_HEAD_INIT(network_throughput_pm_qos.constraints),
.notifiers = &network_throughput_notifier,
.name = "network_throughput",
.target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
@@ -129,15 +129,15 @@
/* unlocked internal variant */
static inline int pm_qos_get_value(struct pm_qos_object *o)
{
- if (plist_head_empty(&o->requests))
+ if (plist_head_empty(&o->constraints))
return o->default_value;
switch (o->type) {
case PM_QOS_MIN:
- return plist_first(&o->requests)->prio;
+ return plist_first(&o->constraints)->prio;
case PM_QOS_MAX:
- return plist_last(&o->requests)->prio;
+ return plist_last(&o->constraints)->prio;
default:
/* runtime check for not using enum */
@@ -170,13 +170,13 @@
* with new value and add, then see if the extremal
* changed
*/
- plist_del(node, &o->requests);
+ plist_del(node, &o->constraints);
plist_node_init(node, value);
- plist_add(node, &o->requests);
+ plist_add(node, &o->constraints);
} else if (del) {
- plist_del(node, &o->requests);
+ plist_del(node, &o->constraints);
} else {
- plist_add(node, &o->requests);
+ plist_add(node, &o->constraints);
}
curr_value = pm_qos_get_value(o);
pm_qos_set_value(o, curr_value);
@@ -222,7 +222,7 @@
}
EXPORT_SYMBOL_GPL(pm_qos_request);
-int pm_qos_request_active(struct pm_qos_request_list *req)
+int pm_qos_request_active(struct pm_qos_request *req)
{
return req->pm_qos_class != 0;
}
@@ -230,24 +230,24 @@
/**
* pm_qos_add_request - inserts new qos request into the list
- * @dep: pointer to a preallocated handle
+ * @req: pointer to a preallocated handle
* @pm_qos_class: identifies which list of qos request to use
* @value: defines the qos request
*
* This function inserts a new entry in the pm_qos_class list of requested qos
* performance characteristics. It recomputes the aggregate QoS expectations
- * for the pm_qos_class of parameters and initializes the pm_qos_request_list
+ * for the pm_qos_class of parameters and initializes the pm_qos_request
* handle. Caller needs to save this handle for later use in updates and
* removal.
*/
-void pm_qos_add_request(struct pm_qos_request_list *dep,
+void pm_qos_add_request(struct pm_qos_request *req,
int pm_qos_class, s32 value)
{
struct pm_qos_object *o = pm_qos_array[pm_qos_class];
int new_value;
- if (pm_qos_request_active(dep)) {
+ if (pm_qos_request_active(req)) {
WARN(1, KERN_ERR "pm_qos_add_request() called for already added request\n");
return;
}
@@ -255,15 +255,15 @@
new_value = o->default_value;
else
new_value = value;
- plist_node_init(&dep->list, new_value);
- dep->pm_qos_class = pm_qos_class;
- update_target(o, &dep->list, 0, PM_QOS_DEFAULT_VALUE);
+ plist_node_init(&req->node, new_value);
+ req->pm_qos_class = pm_qos_class;
+ update_target(o, &req->node, 0, PM_QOS_DEFAULT_VALUE);
}
EXPORT_SYMBOL_GPL(pm_qos_add_request);
/**
* pm_qos_update_request - modifies an existing qos request
- * @pm_qos_req : handle to list element holding a pm_qos request to use
+ * @req : handle to list element holding a pm_qos request to use
* @value: defines the qos request
*
* Updates an existing qos request for the pm_qos_class of parameters along
@@ -271,56 +271,56 @@
*
* Attempts are made to make this code callable on hot code paths.
*/
-void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
+void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value)
{
s32 temp;
struct pm_qos_object *o;
- if (!pm_qos_req) /*guard against callers passing in null */
+ if (!req) /*guard against callers passing in null */
return;
- if (!pm_qos_request_active(pm_qos_req)) {
+ if (!pm_qos_request_active(req)) {
WARN(1, KERN_ERR "pm_qos_update_request() called for unknown object\n");
return;
}
- o = pm_qos_array[pm_qos_req->pm_qos_class];
+ o = pm_qos_array[req->pm_qos_class];
if (new_value == PM_QOS_DEFAULT_VALUE)
temp = o->default_value;
else
temp = new_value;
- if (temp != pm_qos_req->list.prio)
- update_target(o, &pm_qos_req->list, 0, temp);
+ if (temp != req->node.prio)
+ update_target(o, &req->node, 0, temp);
}
EXPORT_SYMBOL_GPL(pm_qos_update_request);
/**
* pm_qos_remove_request - modifies an existing qos request
- * @pm_qos_req: handle to request list element
+ * @req: handle to request list element
*
- * Will remove pm qos request from the list of requests and
+ * Will remove pm qos request from the list of constraints and
* recompute the current target value for the pm_qos_class. Call this
* on slow code paths.
*/
-void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req)
+void pm_qos_remove_request(struct pm_qos_request *req)
{
struct pm_qos_object *o;
- if (pm_qos_req == NULL)
+ if (req == NULL)
return;
/* silent return to keep pcm code cleaner */
- if (!pm_qos_request_active(pm_qos_req)) {
+ if (!pm_qos_request_active(req)) {
WARN(1, KERN_ERR "pm_qos_remove_request() called for unknown object\n");
return;
}
- o = pm_qos_array[pm_qos_req->pm_qos_class];
- update_target(o, &pm_qos_req->list, 1, PM_QOS_DEFAULT_VALUE);
- memset(pm_qos_req, 0, sizeof(*pm_qos_req));
+ o = pm_qos_array[req->pm_qos_class];
+ update_target(o, &req->node, 1, PM_QOS_DEFAULT_VALUE);
+ memset(req, 0, sizeof(*req));
}
EXPORT_SYMBOL_GPL(pm_qos_remove_request);
@@ -368,7 +368,7 @@
pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
if (pm_qos_class >= 0) {
- struct pm_qos_request_list *req = kzalloc(sizeof(*req), GFP_KERNEL);
+ struct pm_qos_request *req = kzalloc(sizeof(*req), GFP_KERNEL);
if (!req)
return -ENOMEM;
@@ -383,7 +383,7 @@
static int pm_qos_power_release(struct inode *inode, struct file *filp)
{
- struct pm_qos_request_list *req;
+ struct pm_qos_request *req;
req = filp->private_data;
pm_qos_remove_request(req);
@@ -399,14 +399,14 @@
s32 value;
unsigned long flags;
struct pm_qos_object *o;
- struct pm_qos_request_list *pm_qos_req = filp->private_data;
+ struct pm_qos_request *req = filp->private_data;
- if (!pm_qos_req)
+ if (!req)
return -EINVAL;
- if (!pm_qos_request_active(pm_qos_req))
+ if (!pm_qos_request_active(req))
return -EINVAL;
- o = pm_qos_array[pm_qos_req->pm_qos_class];
+ o = pm_qos_array[req->pm_qos_class];
spin_lock_irqsave(&pm_qos_lock, flags);
value = pm_qos_get_value(o);
spin_unlock_irqrestore(&pm_qos_lock, flags);
@@ -418,7 +418,7 @@
size_t count, loff_t *f_pos)
{
s32 value;
- struct pm_qos_request_list *pm_qos_req;
+ struct pm_qos_request *req;
if (count == sizeof(s32)) {
if (copy_from_user(&value, buf, sizeof(s32)))
@@ -449,8 +449,8 @@
return -EINVAL;
}
- pm_qos_req = filp->private_data;
- pm_qos_update_request(pm_qos_req, value);
+ req = filp->private_data;
+ pm_qos_update_request(req, value);
return count;
}
