workqueue: Remove redundant function invocation

workqueue: Remove redundant function invocation

timer_stats_timer_set_start_info is invoked twice, additionally, the invocation of this function can be moved to where it is only called when a delay is really required.

index 00ff4d0..9b50a4d 100644
@@ -195,10 +195,10 @@ static void delayed_work_timer_fn(unsigned long __data)

int queue_delayed_work(struct workqueue_struct *wq,
struct delayed_work *dwork, unsigned long delay)
{

-       timer_stats_timer_set_start_info(&dwork->timer);
      if (delay == 0)
              return queue_work(wq, &dwork->work);

+       timer_stats_timer_set_start_info(&dwork->timer);
      return queue_delayed_work_on(-1, wq, dwork, delay);
}
EXPORT_SYMBOL_GPL(queue_delayed_work);
@@ -219,11 +219,12 @@ int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
      struct timer_list *timer = &dwork->timer;
      struct work_struct *work = &dwork->work;

-       timer_stats_timer_set_start_info(&dwork->timer);
      if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
              BUG_ON(timer_pending(timer));
              BUG_ON(!list_empty(&work->entry));

+ timer_stats_timer_set_start_info(&dwork->timer);
+ /* This stores cwq for the moment, for the timer_fn */

              set_wq_data(work, wq_per_cpu(wq, raw_smp_processor_id()));
              timer->expires = jiffies + delay;

@@ -564,7 +565,6 @@ EXPORT_SYMBOL(schedule_work); int schedule_delayed_work(struct delayed_work *dwork,
unsigned long delay)
{

-       timer_stats_timer_set_start_info(&dwork->timer);
      return queue_delayed_work(keventd_wq, dwork, delay);
}

EXPORT_SYMBOL(schedule_delayed_work);
@@ -581,7 +581,6 @@ EXPORT_SYMBOL(schedule_delayed_work); int schedule_delayed_work_on(int cpu,
struct delayed_work *dwork, unsigned long delay)
{

-       timer_stats_timer_set_start_info(&dwork->timer);
      return queue_delayed_work_on(cpu, keventd_wq, dwork, delay);
}

EXPORT_SYMBOL(schedule_delayed_work_on);