[PATCH 3/8] sched/wait: Use __add_wait_queue{_tail}_exclusive() as possible.

[Dongsheng Yang]

From: Dongsheng <yangds.fnst@xxxxxxxxxxxxxx>

There is already a function in include/linux/wait.h to cover the
'exclusive' usage. So we can use it in sched/wait.c to replace
the opened implementation of it.

Signed-off-by: Dongsheng <yangds.fnst@xxxxxxxxxxxxxx>
---
 kernel/sched/wait.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index 283750e..b04827e 100644
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -38,9 +38,8 @@ void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
 	unsigned long flags;
 
 	trace_sched_wait(current);
-	wait->flags |= WQ_FLAG_EXCLUSIVE;
 	spin_lock_irqsave(&q->lock, flags);
-	__add_wait_queue_tail(q, wait);
+	__add_wait_queue_tail_exclusive(q, wait);
 	spin_unlock_irqrestore(&q->lock, flags);
 }
 EXPORT_SYMBOL(add_wait_queue_exclusive);
@@ -192,10 +191,9 @@ prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int state)
 	unsigned long flags;
 
 	trace_sched_wait(current);
-	wait->flags |= WQ_FLAG_EXCLUSIVE;
 	spin_lock_irqsave(&q->lock, flags);
 	if (list_empty(&wait->task_list))
-		__add_wait_queue_tail(q, wait);
+		__add_wait_queue_tail_exclusive(q, wait);
 	set_current_state(state);
 	spin_unlock_irqrestore(&q->lock, flags);
 }
-- 
1.8.2.1

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