--- /dev/null
+/*
+ * This module exposes the interface to kernel space for specifying
+ * QoS dependencies. It provides infrastructure for registration of:
+ *
+ * Dependents on a QoS value : register requests
+ * Watchers of QoS value : get notified when target QoS value changes
+ *
+ * This QoS design is best effort based. Dependents register their QoS needs.
+ * Watchers register to keep track of the current QoS needs of the system.
+ *
+ * There are 3 basic classes of QoS parameter: latency, timeout, throughput
+ * each have defined units:
+ * latency: usec
+ * timeout: usec <-- currently not used.
+ * throughput: kbs (kilo byte / sec)
+ *
+ * There are lists of pm_qos_objects each one wrapping requests, notifiers
+ *
+ * User mode requests on a QOS parameter register themselves to the
+ * subsystem by opening the device node /dev/... and writing there request to
+ * the node. As long as the process holds a file handle open to the node the
+ * client continues to be accounted for. Upon file release the usermode
+ * request is removed and a new qos target is computed. This way when the
+ * request 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>
+ */
+
+/*#define DEBUG*/
+
+#include <linux/pm_qos.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/string.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include <linux/uaccess.h>
+#include <linux/export.h>
+#include <trace/events/power.h>
+
+/*
+ * 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
+ */
+struct pm_qos_object {
+ struct pm_qos_constraints *constraints;
+ struct miscdevice pm_qos_power_miscdev;
+ char *name;
+};
+
+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_constraints cpu_dma_constraints = {
+ .list = PLIST_HEAD_INIT(cpu_dma_constraints.list),
+ .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+ .default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+ .no_constraint_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE,
+ .type = PM_QOS_MIN,
+ .notifiers = &cpu_dma_lat_notifier,
+};
+static struct pm_qos_object cpu_dma_pm_qos = {
+ .constraints = &cpu_dma_constraints,
+ .name = "cpu_dma_latency",
+};
+
+static BLOCKING_NOTIFIER_HEAD(network_lat_notifier);
+static struct pm_qos_constraints network_lat_constraints = {
+ .list = PLIST_HEAD_INIT(network_lat_constraints.list),
+ .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+ .default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+ .no_constraint_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE,
+ .type = PM_QOS_MIN,
+ .notifiers = &network_lat_notifier,
+};
+static struct pm_qos_object network_lat_pm_qos = {
+ .constraints = &network_lat_constraints,
+ .name = "network_latency",
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(network_throughput_notifier);
+static struct pm_qos_constraints network_tput_constraints = {
+ .list = PLIST_HEAD_INIT(network_tput_constraints.list),
+ .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+ .default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+ .no_constraint_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE,
+ .type = PM_QOS_MAX,
+ .notifiers = &network_throughput_notifier,
+};
+static struct pm_qos_object network_throughput_pm_qos = {
+ .constraints = &network_tput_constraints,
+ .name = "network_throughput",
+};
+
+
+static BLOCKING_NOTIFIER_HEAD(memory_bandwidth_notifier);
+static struct pm_qos_constraints memory_bw_constraints = {
+ .list = PLIST_HEAD_INIT(memory_bw_constraints.list),
+ .target_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .default_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .no_constraint_value = PM_QOS_MEMORY_BANDWIDTH_DEFAULT_VALUE,
+ .type = PM_QOS_SUM,
+ .notifiers = &memory_bandwidth_notifier,
+};
+static struct pm_qos_object memory_bandwidth_pm_qos = {
+ .constraints = &memory_bw_constraints,
+ .name = "memory_bandwidth",
+};
+
+
+static struct pm_qos_object *pm_qos_array[] = {
+ &null_pm_qos,
+ &cpu_dma_pm_qos,
+ &network_lat_pm_qos,
+ &network_throughput_pm_qos,
+ &memory_bandwidth_pm_qos,
+};
+
+static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos);
+static ssize_t pm_qos_power_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *f_pos);
+static int pm_qos_power_open(struct inode *inode, struct file *filp);
+static int pm_qos_power_release(struct inode *inode, struct file *filp);
+
+static const struct file_operations pm_qos_power_fops = {
+ .write = pm_qos_power_write,
+ .read = pm_qos_power_read,
+ .open = pm_qos_power_open,
+ .release = pm_qos_power_release,
+ .llseek = noop_llseek,
+};
+
+/* unlocked internal variant */
+static inline int pm_qos_get_value(struct pm_qos_constraints *c)
+{
+ struct plist_node *node;
+ int total_value = 0;
+
+ if (plist_head_empty(&c->list))
+ return c->no_constraint_value;
+
+ switch (c->type) {
+ case PM_QOS_MIN:
+ return plist_first(&c->list)->prio;
+
+ case PM_QOS_MAX:
+ return plist_last(&c->list)->prio;
+
+ case PM_QOS_SUM:
+ plist_for_each(node, &c->list)
+ total_value += node->prio;
+
+ return total_value;
+
+ default:
+ /* runtime check for not using enum */
+ BUG();
+ return PM_QOS_DEFAULT_VALUE;
+ }
+}
+
+s32 pm_qos_read_value(struct pm_qos_constraints *c)
+{
+ return c->target_value;
+}
+
+static inline void pm_qos_set_value(struct pm_qos_constraints *c, s32 value)
+{
+ c->target_value = value;
+}
+
+static inline int pm_qos_get_value(struct pm_qos_constraints *c);
+static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
+{
+ struct pm_qos_object *qos = (struct pm_qos_object *)s->private;
+ struct pm_qos_constraints *c;
+ struct pm_qos_request *req;
+ char *type;
+ unsigned long flags;
+ int tot_reqs = 0;
+ int active_reqs = 0;
+
+ if (IS_ERR_OR_NULL(qos)) {
+ pr_err("%s: bad qos param!\n", __func__);
+ return -EINVAL;
+ }
+ c = qos->constraints;
+ if (IS_ERR_OR_NULL(c)) {
+ pr_err("%s: Bad constraints on qos?\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Lock to ensure we have a snapshot */
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ if (plist_head_empty(&c->list)) {
+ seq_puts(s, "Empty!\n");
+ goto out;
+ }
+
+ switch (c->type) {
+ case PM_QOS_MIN:
+ type = "Minimum";
+ break;
+ case PM_QOS_MAX:
+ type = "Maximum";
+ break;
+ case PM_QOS_SUM:
+ type = "Sum";
+ break;
+ default:
+ type = "Unknown";
+ }
+
+ plist_for_each_entry(req, &c->list, node) {
+ char *state = "Default";
+
+ if ((req->node).prio != c->default_value) {
+ active_reqs++;
+ state = "Active";
+ }
+ tot_reqs++;
+ seq_printf(s, "%d: %d: %s\n", tot_reqs,
+ (req->node).prio, state);
+ }
+
+ seq_printf(s, "Type=%s, Value=%d, Requests: active=%d / total=%d\n",
+ type, pm_qos_get_value(c), active_reqs, tot_reqs);
+
+out:
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+ return 0;
+}
+
+static int pm_qos_dbg_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pm_qos_dbg_show_requests,
+ inode->i_private);
+}
+
+static const struct file_operations pm_qos_debug_fops = {
+ .open = pm_qos_dbg_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/**
+ * pm_qos_update_target - manages the constraints list and calls the notifiers
+ * if needed
+ * @c: constraints data struct
+ * @node: request to add to the list, to update or to remove
+ * @action: action to take on the constraints list
+ * @value: value of the request to add or update
+ *
+ * This function returns 1 if the aggregated constraint value has changed, 0
+ * otherwise.
+ */
+int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
+ enum pm_qos_req_action action, int value)
+{
+ unsigned long flags;
+ int prev_value, curr_value, new_value;
+ int ret;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ prev_value = pm_qos_get_value(c);
+ if (value == PM_QOS_DEFAULT_VALUE)
+ new_value = c->default_value;
+ else
+ new_value = value;
+
+ switch (action) {
+ case PM_QOS_REMOVE_REQ:
+ plist_del(node, &c->list);
+ break;
+ case PM_QOS_UPDATE_REQ:
+ /*
+ * to change the list, we atomically remove, reinit
+ * with new value and add, then see if the extremal
+ * changed
+ */
+ plist_del(node, &c->list);
+ case PM_QOS_ADD_REQ:
+ plist_node_init(node, new_value);
+ plist_add(node, &c->list);
+ break;
+ default:
+ /* no action */
+ ;
+ }
+
+ curr_value = pm_qos_get_value(c);
+ pm_qos_set_value(c, curr_value);
+
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+
+ trace_pm_qos_update_target(action, prev_value, curr_value);
+ if (prev_value != curr_value) {
+ ret = 1;
+ if (c->notifiers)
+ blocking_notifier_call_chain(c->notifiers,
+ (unsigned long)curr_value,
+ NULL);
+ } else {
+ ret = 0;
+ }
+ return ret;
+}
+
+/**
+ * pm_qos_flags_remove_req - Remove device PM QoS flags request.
+ * @pqf: Device PM QoS flags set to remove the request from.
+ * @req: Request to remove from the set.
+ */
+static void pm_qos_flags_remove_req(struct pm_qos_flags *pqf,
+ struct pm_qos_flags_request *req)
+{
+ s32 val = 0;
+
+ list_del(&req->node);
+ list_for_each_entry(req, &pqf->list, node)
+ val |= req->flags;
+
+ pqf->effective_flags = val;
+}
+
+/**
+ * pm_qos_update_flags - Update a set of PM QoS flags.
+ * @pqf: Set of flags to update.
+ * @req: Request to add to the set, to modify, or to remove from the set.
+ * @action: Action to take on the set.
+ * @val: Value of the request to add or modify.
+ *
+ * Update the given set of PM QoS flags and call notifiers if the aggregate
+ * value has changed. Returns 1 if the aggregate constraint value has changed,
+ * 0 otherwise.
+ */
+bool pm_qos_update_flags(struct pm_qos_flags *pqf,
+ struct pm_qos_flags_request *req,
+ enum pm_qos_req_action action, s32 val)
+{
+ unsigned long irqflags;
+ s32 prev_value, curr_value;
+
+ spin_lock_irqsave(&pm_qos_lock, irqflags);
+
+ prev_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
+
+ switch (action) {
+ case PM_QOS_REMOVE_REQ:
+ pm_qos_flags_remove_req(pqf, req);
+ break;
+ case PM_QOS_UPDATE_REQ:
+ pm_qos_flags_remove_req(pqf, req);
+ case PM_QOS_ADD_REQ:
+ req->flags = val;
+ INIT_LIST_HEAD(&req->node);
+ list_add_tail(&req->node, &pqf->list);
+ pqf->effective_flags |= val;
+ break;
+ default:
+ /* no action */
+ ;
+ }
+
+ curr_value = list_empty(&pqf->list) ? 0 : pqf->effective_flags;
+
+ spin_unlock_irqrestore(&pm_qos_lock, irqflags);
+
+ trace_pm_qos_update_flags(action, prev_value, curr_value);
+ return prev_value != curr_value;
+}
+
+/**
+ * pm_qos_request - returns current system wide qos expectation
+ * @pm_qos_class: identification of which qos value is requested
+ *
+ * This function returns the current target value.
+ */
+int pm_qos_request(int pm_qos_class)
+{
+ return pm_qos_read_value(pm_qos_array[pm_qos_class]->constraints);
+}
+EXPORT_SYMBOL_GPL(pm_qos_request);
+
+int pm_qos_request_active(struct pm_qos_request *req)
+{
+ return req->pm_qos_class != 0;
+}
+EXPORT_SYMBOL_GPL(pm_qos_request_active);
+
+static void __pm_qos_update_request(struct pm_qos_request *req,
+ s32 new_value)
+{
+ trace_pm_qos_update_request(req->pm_qos_class, new_value);
+
+ if (new_value != req->node.prio)
+ pm_qos_update_target(
+ pm_qos_array[req->pm_qos_class]->constraints,
+ &req->node, PM_QOS_UPDATE_REQ, new_value);
+}
+
+/**
+ * pm_qos_work_fn - the timeout handler of pm_qos_update_request_timeout
+ * @work: work struct for the delayed work (timeout)
+ *
+ * This cancels the timeout request by falling back to the default at timeout.
+ */
+static void pm_qos_work_fn(struct work_struct *work)
+{
+ struct pm_qos_request *req = container_of(to_delayed_work(work),
+ struct pm_qos_request,
+ work);
+
+ __pm_qos_update_request(req, PM_QOS_DEFAULT_VALUE);
+}
+
+/**
+ * pm_qos_add_request - inserts new qos request into the list
+ * @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
+ * handle. Caller needs to save this handle for later use in updates and
+ * removal.
+ */
+
+void pm_qos_add_request(struct pm_qos_request *req,
+ int pm_qos_class, s32 value)
+{
+ if (!req) /*guard against callers passing in null */
+ return;
+
+ if (pm_qos_request_active(req)) {
+ WARN(1, KERN_ERR "pm_qos_add_request() called for already added request\n");
+ return;
+ }
+ req->pm_qos_class = pm_qos_class;
+ INIT_DELAYED_WORK(&req->work, pm_qos_work_fn);
+ trace_pm_qos_add_request(pm_qos_class, value);
+ pm_qos_update_target(pm_qos_array[pm_qos_class]->constraints,
+ &req->node, PM_QOS_ADD_REQ, value);
+}
+EXPORT_SYMBOL_GPL(pm_qos_add_request);
+
+/**
+ * pm_qos_update_request - modifies an existing qos request
+ * @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
+ * with updating the target pm_qos_class value.
+ *
+ * Attempts are made to make this code callable on hot code paths.
+ */
+void pm_qos_update_request(struct pm_qos_request *req,
+ s32 new_value)
+{
+ if (!req) /*guard against callers passing in null */
+ return;
+
+ if (!pm_qos_request_active(req)) {
+ WARN(1, KERN_ERR "pm_qos_update_request() called for unknown object\n");
+ return;
+ }
+
+ cancel_delayed_work_sync(&req->work);
+ __pm_qos_update_request(req, new_value);
+}
+EXPORT_SYMBOL_GPL(pm_qos_update_request);
+
+/**
+ * pm_qos_update_request_timeout - modifies an existing qos request temporarily.
+ * @req : handle to list element holding a pm_qos request to use
+ * @new_value: defines the temporal qos request
+ * @timeout_us: the effective duration of this qos request in usecs.
+ *
+ * After timeout_us, this qos request is cancelled automatically.
+ */
+void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value,
+ unsigned long timeout_us)
+{
+ if (!req)
+ return;
+ if (WARN(!pm_qos_request_active(req),
+ "%s called for unknown object.", __func__))
+ return;
+
+ cancel_delayed_work_sync(&req->work);
+
+ trace_pm_qos_update_request_timeout(req->pm_qos_class,
+ new_value, timeout_us);
+ if (new_value != req->node.prio)
+ pm_qos_update_target(
+ pm_qos_array[req->pm_qos_class]->constraints,
+ &req->node, PM_QOS_UPDATE_REQ, new_value);
+
+ schedule_delayed_work(&req->work, usecs_to_jiffies(timeout_us));
+}
+
+/**
+ * pm_qos_remove_request - modifies an existing qos request
+ * @req: handle to request list element
+ *
+ * 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 *req)
+{
+ if (!req) /*guard against callers passing in null */
+ return;
+ /* silent return to keep pcm code cleaner */
+
+ if (!pm_qos_request_active(req)) {
+ WARN(1, KERN_ERR "pm_qos_remove_request() called for unknown object\n");
+ return;
+ }
+
+ cancel_delayed_work_sync(&req->work);
+
+ trace_pm_qos_remove_request(req->pm_qos_class, PM_QOS_DEFAULT_VALUE);
+ pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints,
+ &req->node, PM_QOS_REMOVE_REQ,
+ PM_QOS_DEFAULT_VALUE);
+ memset(req, 0, sizeof(*req));
+}
+EXPORT_SYMBOL_GPL(pm_qos_remove_request);
+
+/**
+ * pm_qos_add_notifier - sets notification entry for changes to target value
+ * @pm_qos_class: identifies which qos target changes should be notified.
+ * @notifier: notifier block managed by caller.
+ *
+ * will register the notifier into a notification chain that gets called
+ * upon changes to the pm_qos_class target value.
+ */
+int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier)
+{
+ int retval;
+
+ retval = blocking_notifier_chain_register(
+ pm_qos_array[pm_qos_class]->constraints->notifiers,
+ notifier);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(pm_qos_add_notifier);
+
+/**
+ * pm_qos_remove_notifier - deletes notification entry from chain.
+ * @pm_qos_class: identifies which qos target changes are notified.
+ * @notifier: notifier block to be removed.
+ *
+ * will remove the notifier from the notification chain that gets called
+ * upon changes to the pm_qos_class target value.
+ */
+int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
+{
+ int retval;
+
+ retval = blocking_notifier_chain_unregister(
+ pm_qos_array[pm_qos_class]->constraints->notifiers,
+ notifier);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
+
+/* User space interface to PM QoS classes via misc devices */
+static int register_pm_qos_misc(struct pm_qos_object *qos, struct dentry *d)
+{
+ qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
+ qos->pm_qos_power_miscdev.name = qos->name;
+ qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
+
+ if (d) {
+ (void)debugfs_create_file(qos->name, S_IRUGO, d,
+ (void *)qos, &pm_qos_debug_fops);
+ }
+
+ return misc_register(&qos->pm_qos_power_miscdev);
+}
+
+static int find_pm_qos_object_by_minor(int minor)
+{
+ int pm_qos_class;
+
+ for (pm_qos_class = PM_QOS_CPU_DMA_LATENCY;
+ pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
+ if (minor ==
+ pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
+ return pm_qos_class;
+ }
+ return -1;
+}
+
+static int pm_qos_power_open(struct inode *inode, struct file *filp)
+{
+ long pm_qos_class;
+
+ pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
+ if (pm_qos_class >= PM_QOS_CPU_DMA_LATENCY) {
+ struct pm_qos_request *req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ pm_qos_add_request(req, pm_qos_class, PM_QOS_DEFAULT_VALUE);
+ filp->private_data = req;
+
+ return 0;
+ }
+ return -EPERM;
+}
+
+static int pm_qos_power_release(struct inode *inode, struct file *filp)
+{
+ struct pm_qos_request *req;
+
+ req = filp->private_data;
+ pm_qos_remove_request(req);
+ kfree(req);
+
+ return 0;
+}
+
+
+static ssize_t pm_qos_power_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ s32 value;
+ unsigned long flags;
+ struct pm_qos_request *req = filp->private_data;
+
+ if (!req)
+ return -EINVAL;
+ if (!pm_qos_request_active(req))
+ return -EINVAL;
+
+ spin_lock_irqsave(&pm_qos_lock, flags);
+ value = pm_qos_get_value(pm_qos_array[req->pm_qos_class]->constraints);
+ spin_unlock_irqrestore(&pm_qos_lock, flags);
+
+ return simple_read_from_buffer(buf, count, f_pos, &value, sizeof(s32));
+}
+
+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 *req;
+
+ if (count == sizeof(s32)) {
+ if (copy_from_user(&value, buf, sizeof(s32)))
+ return -EFAULT;
+ } else {
+ int ret;
+
+ ret = kstrtos32_from_user(buf, count, 16, &value);
+ if (ret)
+ return ret;
+ }
+
+ req = filp->private_data;
+ pm_qos_update_request(req, value);
+
+ return count;
+}
+
+
+static int __init pm_qos_power_init(void)
+{
+ int ret = 0;
+ int i;
+ struct dentry *d;
+
+ BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
+
+ d = debugfs_create_dir("pm_qos", NULL);
+ if (IS_ERR_OR_NULL(d))
+ d = NULL;
+
+ for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
+ ret = register_pm_qos_misc(pm_qos_array[i], d);
+ if (ret < 0) {
+ printk(KERN_ERR "pm_qos_param: %s setup failed\n",
+ pm_qos_array[i]->name);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+late_initcall(pm_qos_power_init);
Code Review / kvmfornfv.git / blobdiff