Merge "msm: kgsl: convert some workqueues to use kthreads."

drivers/gpu/msm/adreno_dispatch.c

@@ -2443,7 +2443,7 @@ static void _dispatcher_power_down(struct adreno_device *adreno_dev)
 	mutex_unlock(&device->mutex);
 }
 
-static void adreno_dispatcher_work(struct work_struct *work)
+static void adreno_dispatcher_work(struct kthread_work *work)
 {
 	struct adreno_dispatcher *dispatcher =
 		container_of(work, struct adreno_dispatcher, work);
@@ -2503,7 +2503,7 @@ void adreno_dispatcher_schedule(struct kgsl_device *device)
 	struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
 	struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
 
-	kgsl_schedule_work(&dispatcher->work);
+	queue_kthread_work(&kgsl_driver.worker, &dispatcher->work);
 }
 
 /**
@@ -2799,7 +2799,7 @@ int adreno_dispatcher_init(struct adreno_device *adreno_dev)
 	setup_timer(&dispatcher->fault_timer, adreno_dispatcher_fault_timer,
 		(unsigned long) adreno_dev);
 
-	INIT_WORK(&dispatcher->work, adreno_dispatcher_work);
+	init_kthread_work(&dispatcher->work, adreno_dispatcher_work);
 
 	init_completion(&dispatcher->idle_gate);
 	complete_all(&dispatcher->idle_gate);

drivers/gpu/msm/adreno_dispatch.h

@@ -91,7 +91,7 @@ struct adreno_dispatcher {
 	atomic_t fault;
 	struct plist_head pending;
 	spinlock_t plist_lock;
-	struct work_struct work;
+	struct kthread_work work;
 	struct kobject kobj;
 	struct completion idle_gate;
 	unsigned int disp_preempt_fair_sched;

drivers/gpu/msm/kgsl.c

@@ -4864,6 +4864,8 @@ static void kgsl_core_exit(void)
 static int __init kgsl_core_init(void)
 {
 	int result = 0;
+	struct sched_param param = { .sched_priority = 2 };
+
 	/* alloc major and minor device numbers */
 	result = alloc_chrdev_region(&kgsl_driver.major, 0, KGSL_DEVICE_MAX,
 		"kgsl");
@@ -4929,6 +4931,18 @@ static int __init kgsl_core_init(void)
 	kgsl_driver.mem_workqueue = alloc_workqueue("kgsl-mementry",
 		WQ_MEM_RECLAIM, 0);
 
+	init_kthread_worker(&kgsl_driver.worker);
+
+	kgsl_driver.worker_thread = kthread_run(kthread_worker_fn,
+		&kgsl_driver.worker, "kgsl_worker_thread");
+
+	if (IS_ERR(kgsl_driver.worker_thread)) {
+		pr_err("unable to start kgsl thread\n");
+		goto err;
+	}
+
+	sched_setscheduler(kgsl_driver.worker_thread, SCHED_FIFO, &param);
+
 	kgsl_events_init();
 
 	result = kgsl_drawobjs_cache_init();

drivers/gpu/msm/kgsl.h

@@ -26,6 +26,7 @@
 #include <linux/mm.h>
 #include <linux/dma-attrs.h>
 #include <linux/uaccess.h>
+#include <linux/kthread.h>
 #include <asm/cacheflush.h>
 
 /*
@@ -152,6 +153,8 @@ struct kgsl_driver {
 	unsigned int full_cache_threshold;
 	struct workqueue_struct *workqueue;
 	struct workqueue_struct *mem_workqueue;
+	struct kthread_worker worker;
+	struct task_struct *worker_thread;
 };
 
 extern struct kgsl_driver kgsl_driver;
@@ -301,7 +304,7 @@ struct kgsl_event {
 	void *priv;
 	struct list_head node;
 	unsigned int created;
-	struct work_struct work;
+	struct kthread_work work;
 	int result;
 	struct kgsl_event_group *group;
 };

drivers/gpu/msm/kgsl_events.c

@@ -32,7 +32,7 @@ static inline void signal_event(struct kgsl_device *device,
 {
 	list_del(&event->node);
 	event->result = result;
-	queue_work(device->events_wq, &event->work);
+	queue_kthread_work(&kgsl_driver.worker, &event->work);
 }
 
 /**
@@ -42,7 +42,7 @@ static inline void signal_event(struct kgsl_device *device,
  * Each event callback has its own work struct and is run on a event specific
  * workqeuue.  This is the worker that queues up the event callback function.
  */
-static void _kgsl_event_worker(struct work_struct *work)
+static void _kgsl_event_worker(struct kthread_work *work)
 {
 	struct kgsl_event *event = container_of(work, struct kgsl_event, work);
 	int id = KGSL_CONTEXT_ID(event->context);
@@ -282,7 +282,7 @@ int kgsl_add_event(struct kgsl_device *device, struct kgsl_event_group *group,
 	event->created = jiffies;
 	event->group = group;
 
-	INIT_WORK(&event->work, _kgsl_event_worker);
+	init_kthread_work(&event->work, _kgsl_event_worker);
 
 	trace_kgsl_register_event(KGSL_CONTEXT_ID(context), timestamp, func);
 
@@ -297,7 +297,7 @@ int kgsl_add_event(struct kgsl_device *device, struct kgsl_event_group *group,
 
 	if (timestamp_cmp(retired, timestamp) >= 0) {
 		event->result = KGSL_EVENT_RETIRED;
-		queue_work(device->events_wq, &event->work);
+		queue_kthread_work(&kgsl_driver.worker, &event->work);
 		spin_unlock(&group->lock);
 		return 0;
 	}