On Thu, Aug 11, 2011 at 05:06:39PM +0200, jean.pihet@xxxxxxxxxxxxxx wrote:
> From: Jean Pihet <j-pihet@xxxxxx>
>
> - 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@xxxxxx>
> ---
> drivers/media/video/via-camera.c | 2 +-
> drivers/net/wireless/ipw2x00/ipw2100.c | 2 +-
> include/linux/netdevice.h | 2 +-
> include/linux/pm_qos.h | 22 ++++----
> include/sound/pcm.h | 2 +-
> kernel/power/qos.c | 90 ++++++++++++++++---------------
> 6 files changed, 61 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/media/video/via-camera.c b/drivers/media/video/via-camera.c
> index b3ca389..fba6c64 100644
> --- a/drivers/media/video/via-camera.c
> +++ b/drivers/media/video/via-camera.c
> @@ -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
> */
> diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
> index d9df575..f323ec0 100644
> --- a/drivers/net/wireless/ipw2x00/ipw2100.c
> +++ b/drivers/net/wireless/ipw2x00/ipw2100.c
> @@ -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
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index cc1eb9e..82f01d9 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -999,7 +999,7 @@ 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;
> diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
> index 7ba67541..6b0968f 100644
> --- a/include/linux/pm_qos.h
> +++ b/include/linux/pm_qos.h
> @@ -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
>
> diff --git a/include/sound/pcm.h b/include/sound/pcm.h
> index 1204f17..d3b068f 100644
> --- a/include/sound/pcm.h
> +++ b/include/sound/pcm.h
> @@ -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;
> diff --git a/kernel/power/qos.c b/kernel/power/qos.c
> index 3bf69f1..61275f2 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 @@ 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, pm_qos_lock),
> + .constraints = PLIST_HEAD_INIT(cpu_dma_pm_qos.constraints, pm_qos_lock),
> .notifiers = &cpu_dma_lat_notifier,
> .name = "cpu_dma_latency",
> .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
> @@ -84,7 +84,8 @@ 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, pm_qos_lock),
> + .constraints = PLIST_HEAD_INIT(network_lat_pm_qos.constraints,
> + pm_qos_lock),
> .notifiers = &network_lat_notifier,
> .name = "network_latency",
> .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
> @@ -95,7 +96,8 @@ 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, pm_qos_lock),
> + .constraints = PLIST_HEAD_INIT(network_throughput_pm_qos.constraints,
> + pm_qos_lock),
> .notifiers = &network_throughput_notifier,
> .name = "network_throughput",
> .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
> @@ -129,15 +131,15 @@ 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 +172,13 @@ 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 +224,7 @@ 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 +232,24 @@ 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 +257,15 @@ 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 +273,56 @@ 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 +370,7 @@ 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 +385,7 @@ 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 +401,14 @@ 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 +420,7 @@ 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 +451,8 @@ 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;
> }
> --
> 1.7.2.5
>
Acked-by: markgross<markgross@xxxxxxxxxxx>
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