[POWERPC] Implement SLB shadow buffer

[powerpc.git] / kernel / workqueue.c

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 90d2c60..448e8f7 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -93,9 +93,12 @@ static void __queue_work(struct cpu_workqueue_struct *cwq,
        spin_unlock_irqrestore(&cwq->lock, flags);
 }
 
-/*
- * Queue work on a workqueue. Return non-zero if it was successfully
- * added.
+/**
+ * queue_work - queue work on a workqueue
+ * @wq: workqueue to use
+ * @work: work to queue
+ *
+ * Returns non-zero if it was successfully added.
  *
  * We queue the work to the CPU it was submitted, but there is no
  * guarantee that it will be processed by that CPU.
@@ -114,6 +117,7 @@ int fastcall queue_work(struct workqueue_struct *wq, struct work_struct *work)
        put_cpu();
        return ret;
 }
+EXPORT_SYMBOL_GPL(queue_work);
 
 static void delayed_work_timer_fn(unsigned long __data)
 {
@@ -127,6 +131,14 @@ static void delayed_work_timer_fn(unsigned long __data)
        __queue_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
 }
 
+/**
+ * queue_delayed_work - queue work on a workqueue after delay
+ * @wq: workqueue to use
+ * @work: work to queue
+ * @delay: number of jiffies to wait before queueing
+ *
+ * Returns non-zero if it was successfully added.
+ */
 int fastcall queue_delayed_work(struct workqueue_struct *wq,
                        struct work_struct *work, unsigned long delay)
 {
@@ -147,6 +159,38 @@ int fastcall queue_delayed_work(struct workqueue_struct *wq,
        }
        return ret;
 }
+EXPORT_SYMBOL_GPL(queue_delayed_work);
+
+/**
+ * queue_delayed_work_on - queue work on specific CPU after delay
+ * @cpu: CPU number to execute work on
+ * @wq: workqueue to use
+ * @work: work to queue
+ * @delay: number of jiffies to wait before queueing
+ *
+ * Returns non-zero if it was successfully added.
+ */
+int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
+                       struct work_struct *work, unsigned long delay)
+{
+       int ret = 0;
+       struct timer_list *timer = &work->timer;
+
+       if (!test_and_set_bit(0, &work->pending)) {
+               BUG_ON(timer_pending(timer));
+               BUG_ON(!list_empty(&work->entry));
+
+               /* This stores wq for the moment, for the timer_fn */
+               work->wq_data = wq;
+               timer->expires = jiffies + delay;
+               timer->data = (unsigned long)work;
+               timer->function = delayed_work_timer_fn;
+               add_timer_on(timer, cpu);
+               ret = 1;
+       }
+       return ret;
+}
+EXPORT_SYMBOL_GPL(queue_delayed_work_on);
 
 static void run_workqueue(struct cpu_workqueue_struct *cwq)
 {
@@ -251,8 +295,9 @@ static void flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
        }
 }
 
-/*
+/**
  * flush_workqueue - ensure that any scheduled work has run to completion.
+ * @wq: workqueue to flush
  *
  * Forces execution of the workqueue and blocks until its completion.
  * This is typically used in driver shutdown handlers.
@@ -281,6 +326,7 @@ void fastcall flush_workqueue(struct workqueue_struct *wq)
                unlock_cpu_hotplug();
        }
 }
+EXPORT_SYMBOL_GPL(flush_workqueue);
 
 static struct task_struct *create_workqueue_thread(struct workqueue_struct *wq,
                                                   int cpu)
@@ -358,6 +404,7 @@ struct workqueue_struct *__create_workqueue(const char *name,
        }
        return wq;
 }
+EXPORT_SYMBOL_GPL(__create_workqueue);
 
 static void cleanup_workqueue_thread(struct workqueue_struct *wq, int cpu)
 {
@@ -374,6 +421,12 @@ static void cleanup_workqueue_thread(struct workqueue_struct *wq, int cpu)
                kthread_stop(p);
 }
 
+/**
+ * destroy_workqueue - safely terminate a workqueue
+ * @wq: target workqueue
+ *
+ * Safely destroy a workqueue. All work currently pending will be done first.
+ */
 void destroy_workqueue(struct workqueue_struct *wq)
 {
        int cpu;
@@ -395,38 +448,51 @@ void destroy_workqueue(struct workqueue_struct *wq)
        free_percpu(wq->cpu_wq);
        kfree(wq);
 }
+EXPORT_SYMBOL_GPL(destroy_workqueue);
 
 static struct workqueue_struct *keventd_wq;
 
+/**
+ * schedule_work - put work task in global workqueue
+ * @work: job to be done
+ *
+ * This puts a job in the kernel-global workqueue.
+ */
 int fastcall schedule_work(struct work_struct *work)
 {
        return queue_work(keventd_wq, work);
 }
+EXPORT_SYMBOL(schedule_work);
 
+/**
+ * schedule_delayed_work - put work task in global workqueue after delay
+ * @work: job to be done
+ * @delay: number of jiffies to wait
+ *
+ * After waiting for a given time this puts a job in the kernel-global
+ * workqueue.
+ */
 int fastcall schedule_delayed_work(struct work_struct *work, unsigned long delay)
 {
        return queue_delayed_work(keventd_wq, work, delay);
 }
+EXPORT_SYMBOL(schedule_delayed_work);
 
+/**
+ * schedule_delayed_work_on - queue work in global workqueue on CPU after delay
+ * @cpu: cpu to use
+ * @work: job to be done
+ * @delay: number of jiffies to wait
+ *
+ * After waiting for a given time this puts a job in the kernel-global
+ * workqueue on the specified CPU.
+ */
 int schedule_delayed_work_on(int cpu,
                        struct work_struct *work, unsigned long delay)
 {
-       int ret = 0;
-       struct timer_list *timer = &work->timer;
-
-       if (!test_and_set_bit(0, &work->pending)) {
-               BUG_ON(timer_pending(timer));
-               BUG_ON(!list_empty(&work->entry));
-               /* This stores keventd_wq for the moment, for the timer_fn */
-               work->wq_data = keventd_wq;
-               timer->expires = jiffies + delay;
-               timer->data = (unsigned long)work;
-               timer->function = delayed_work_timer_fn;
-               add_timer_on(timer, cpu);
-               ret = 1;
-       }
-       return ret;
+       return queue_delayed_work_on(cpu, keventd_wq, work, delay);
 }
+EXPORT_SYMBOL(schedule_delayed_work_on);
 
 /**
  * schedule_on_each_cpu - call a function on each online CPU from keventd
@@ -463,6 +529,7 @@ void flush_scheduled_work(void)
 {
        flush_workqueue(keventd_wq);
 }
+EXPORT_SYMBOL(flush_scheduled_work);
 
 /**
  * cancel_rearming_delayed_workqueue - reliably kill off a delayed
@@ -619,13 +686,3 @@ void init_workqueues(void)
        BUG_ON(!keventd_wq);
 }
 
-EXPORT_SYMBOL_GPL(__create_workqueue);
-EXPORT_SYMBOL_GPL(queue_work);
-EXPORT_SYMBOL_GPL(queue_delayed_work);
-EXPORT_SYMBOL_GPL(flush_workqueue);
-EXPORT_SYMBOL_GPL(destroy_workqueue);
-
-EXPORT_SYMBOL(schedule_work);
-EXPORT_SYMBOL(schedule_delayed_work);
-EXPORT_SYMBOL(schedule_delayed_work_on);
-EXPORT_SYMBOL(flush_scheduled_work);