[CPUFREQ] Add queue_delayed_work_on() interface for workqueues.

Add queue_delayed_work_on() interface for workqueues.
Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Dave Jones <davej@redhat.com>

include/linux/workqueue.h

@@ -63,6 +63,8 @@ extern void destroy_workqueue(struct workqueue_struct *wq);
 
 extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
 extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct work_struct *work, unsigned long delay));
+extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
+	struct work_struct *work, unsigned long delay);
 extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
 
 extern int FASTCALL(schedule_work(struct work_struct *work));

kernel/workqueue.c

@@ -148,6 +148,27 @@ int fastcall queue_delayed_work(struct workqueue_struct *wq,
 	return ret;
 }
 
+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;
+}
+
 static void run_workqueue(struct cpu_workqueue_struct *cwq)
 {
 	unsigned long flags;
@@ -411,21 +432,7 @@ int fastcall schedule_delayed_work(struct work_struct *work, unsigned long delay
 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);
 }
 
 /**
@@ -622,6 +629,7 @@ void init_workqueues(void)
 EXPORT_SYMBOL_GPL(__create_workqueue);
 EXPORT_SYMBOL_GPL(queue_work);
 EXPORT_SYMBOL_GPL(queue_delayed_work);
+EXPORT_SYMBOL_GPL(queue_delayed_work_on);
 EXPORT_SYMBOL_GPL(flush_workqueue);
 EXPORT_SYMBOL_GPL(destroy_workqueue);