* requirement that the application has is cleaned up when closes the file
* pointer or exits the pm_qos_object will get an opportunity to clean up.
*
- * mark gross mgross@linux.intel.com
+ * Mark Gross <mgross@linux.intel.com>
*/
#include <linux/pm_qos_params.h>
#include <linux/uaccess.h>
/*
- * locking rule: all changes to target_value or requirements or notifiers lists
+ * locking rule: all changes to requirements 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
*/
struct miscdevice pm_qos_power_miscdev;
char *name;
s32 default_value;
- s32 target_value;
+ atomic_t target_value;
s32 (*comparitor)(s32, s32);
};
.notifiers = &cpu_dma_lat_notifier,
.name = "cpu_dma_latency",
.default_value = 2000 * USEC_PER_SEC,
- .target_value = 2000 * USEC_PER_SEC,
+ .target_value = ATOMIC_INIT(2000 * USEC_PER_SEC),
.comparitor = min_compare
};
.notifiers = &network_lat_notifier,
.name = "network_latency",
.default_value = 2000 * USEC_PER_SEC,
- .target_value = 2000 * USEC_PER_SEC,
+ .target_value = ATOMIC_INIT(2000 * USEC_PER_SEC),
.comparitor = min_compare
};
.notifiers = &network_throughput_notifier,
.name = "network_throughput",
.default_value = 0,
- .target_value = 0,
+ .target_value = ATOMIC_INIT(0),
.comparitor = max_compare
};
extreme_value = pm_qos_array[target]->comparitor(
extreme_value, node->value);
}
- if (pm_qos_array[target]->target_value != extreme_value) {
+ if (atomic_read(&pm_qos_array[target]->target_value) != extreme_value) {
call_notifier = 1;
- pm_qos_array[target]->target_value = extreme_value;
+ atomic_set(&pm_qos_array[target]->target_value, extreme_value);
pr_debug(KERN_ERR "new target for qos %d is %d\n", target,
- pm_qos_array[target]->target_value);
+ atomic_read(&pm_qos_array[target]->target_value));
}
spin_unlock_irqrestore(&pm_qos_lock, flags);
*/
int pm_qos_requirement(int pm_qos_class)
{
- int ret_val;
- unsigned long flags;
-
- spin_lock_irqsave(&pm_qos_lock, flags);
- ret_val = pm_qos_array[pm_qos_class]->target_value;
- spin_unlock_irqrestore(&pm_qos_lock, flags);
-
- return ret_val;
+ return atomic_read(&pm_qos_array[pm_qos_class]->target_value);
}
EXPORT_SYMBOL_GPL(pm_qos_requirement);
* @value: defines the qos request
*
* This function inserts a new entry in the pm_qos_class list of requested qos
- * performance charactoistics. It recomputes the agregate QoS expectations for
- * the pm_qos_class of parrameters.
+ * performance characteristics. It recomputes the aggregate QoS expectations
+ * for the pm_qos_class of parameters.
*/
int pm_qos_add_requirement(int pm_qos_class, char *name, s32 value)
{
* @name: identifies the request
* @value: defines the qos request
*
- * Updates an existing qos requierement for the pm_qos_class of parameters along
+ * Updates an existing qos requirement for the pm_qos_class of parameters along
* with updating the target pm_qos_class value.
*
- * If the named request isn't in the lest then no change is made.
+ * If the named request isn't in the list then no change is made.
*/
int pm_qos_update_requirement(int pm_qos_class, char *name, s32 new_value)
{
* @pm_qos_class: identifies which list of qos request to us
* @name: identifies the request
*
- * Will remove named qos request from pm_qos_class list of parrameters and
+ * Will remove named qos request from pm_qos_class list of parameters and
* recompute the current target value for the pm_qos_class.
*/
void pm_qos_remove_requirement(int pm_qos_class, char *name)
* @notifier: notifier block managed by caller.
*
* will register the notifier into a notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
*/
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
{
* @notifier: notifier block to be removed.
*
* will remove the notifier from the notification chain that gets called
- * uppon changes to the pm_qos_class target value.
+ * upon changes to the pm_qos_class target value.
*/
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
{
}
EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
-#define PID_NAME_LEN sizeof("process_1234567890")
-static char name[PID_NAME_LEN];
+#define PID_NAME_LEN 32
static int pm_qos_power_open(struct inode *inode, struct file *filp)
{
int ret;
long pm_qos_class;
+ char name[PID_NAME_LEN];
pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
if (pm_qos_class >= 0) {
filp->private_data = (void *)pm_qos_class;
- sprintf(name, "process_%d", current->pid);
+ snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
ret = pm_qos_add_requirement(pm_qos_class, name,
PM_QOS_DEFAULT_VALUE);
if (ret >= 0)
return 0;
}
-
return -EPERM;
}
static int pm_qos_power_release(struct inode *inode, struct file *filp)
{
int pm_qos_class;
+ char name[PID_NAME_LEN];
pm_qos_class = (long)filp->private_data;
- sprintf(name, "process_%d", current->pid);
+ snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
pm_qos_remove_requirement(pm_qos_class, name);
return 0;
{
s32 value;
int pm_qos_class;
+ char name[PID_NAME_LEN];
pm_qos_class = (long)filp->private_data;
if (count != sizeof(s32))
return -EINVAL;
if (copy_from_user(&value, buf, sizeof(s32)))
return -EFAULT;
- sprintf(name, "process_%d", current->pid);
+ snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
pm_qos_update_requirement(pm_qos_class, name, value);
return sizeof(s32);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff