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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>
This commit is contained in:
Jean Pihet 2011-08-25 15:35:12 +02:00 committed by Rafael J. Wysocki
parent e8db0be124
commit cc74998618
6 changed files with 59 additions and 59 deletions
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2
drivers/media/video/via-camera.c
View File

@ -69,7 +69,7 @@ struct via_camera {
struct mutex lock;
enum viacam_opstate opstate;
unsigned long flags;
struct pm_qos_request_list qos_request;
struct pm_qos_request qos_request;
/*
* GPIO info for power/reset management
*/

2
drivers/net/wireless/ipw2x00/ipw2100.c
View File

@ -174,7 +174,7 @@ that only one external action is invoked at a time.
#define DRV_DESCRIPTION "Intel(R) PRO/Wireless 2100 Network Driver"
#define DRV_COPYRIGHT "Copyright(c) 2003-2006 Intel Corporation"
static struct pm_qos_request_list ipw2100_pm_qos_req;
static struct pm_qos_request ipw2100_pm_qos_req;
/* Debugging stuff */
#ifdef CONFIG_IPW2100_DEBUG

2
include/linux/netdevice.h
View File

@ -964,7 +964,7 @@ struct net_device {
*/
char name[IFNAMSIZ];
struct pm_qos_request_list pm_qos_req;
struct pm_qos_request pm_qos_req;
/* device name hash chain */
struct hlist_node name_hlist;

22
include/linux/pm_qos.h
View File

@ -20,30 +20,30 @@
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
struct pm_qos_request_list {
struct plist_node list;
struct pm_qos_request {
struct plist_node node;
int pm_qos_class;
};
#ifdef CONFIG_PM
void pm_qos_add_request(struct pm_qos_request_list *l,
int pm_qos_class, s32 value);
void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
s32 value);
void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value);
void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req);
void pm_qos_remove_request(struct pm_qos_request *req);
int pm_qos_request(int pm_qos_class);
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_request_active(struct pm_qos_request_list *req);
int pm_qos_request_active(struct pm_qos_request *req);
#else
static inline void pm_qos_add_request(struct pm_qos_request_list *l,
static inline void pm_qos_add_request(struct pm_qos_request *req,
int pm_qos_class, s32 value)
{ return; }
static inline void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
static inline void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value)
{ return; }
static inline void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req)
static inline void pm_qos_remove_request(struct pm_qos_request *req)
{ return; }
static inline int pm_qos_request(int pm_qos_class)
@ -54,7 +54,7 @@ static inline int pm_qos_add_notifier(int pm_qos_class,
static inline int pm_qos_remove_notifier(int pm_qos_class,
struct notifier_block *notifier)
{ return 0; }
static inline int pm_qos_request_active(struct pm_qos_request_list *req)
static inline int pm_qos_request_active(struct pm_qos_request *req)
{ return 0; }
#endif

2
include/sound/pcm.h
View File

@ -373,7 +373,7 @@ struct snd_pcm_substream {
int number;
char name[32]; /* substream name */
int stream; /* stream (direction) */
struct pm_qos_request_list latency_pm_qos_req; /* pm_qos request */
struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
size_t buffer_bytes_max; /* limit ring buffer size */
struct snd_dma_buffer dma_buffer;
unsigned int dma_buf_id;

88
kernel/power/qos.c
View File

@ -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 @@ enum pm_qos_type {
* 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 DEFINE_SPINLOCK(pm_qos_lock);
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 struct pm_qos_object cpu_dma_pm_qos = {
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 struct pm_qos_object network_lat_pm_qos = {
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 @@ static const struct file_operations pm_qos_power_fops = {
/* 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 @@ static void update_target(struct pm_qos_object *o, struct plist_node *node,
* 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 @@ int pm_qos_request(int pm_qos_class)
}
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 @@ EXPORT_SYMBOL_GPL(pm_qos_request_active);
/**
* 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 @@ void pm_qos_add_request(struct pm_qos_request_list *dep,
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 @@ EXPORT_SYMBOL_GPL(pm_qos_add_request);
*
* 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 @@ static int pm_qos_power_open(struct inode *inode, struct file *filp)
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_open(struct inode *inode, struct file *filp)
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 @@ static ssize_t pm_qos_power_read(struct file *filp, char __user *buf,
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 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
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 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
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;
}