use wrapper functions.

Since there are add_wait_queue_exclusive_locked() and remove_wait_queue_locked()
, we'd better use them instead.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
----
 kernel/sched.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 6af210a..be5ab70 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4039,8 +4039,7 @@ do_wait_for_common(struct completion *x, long timeout, int state)
 	if (!x->done) {
 		DECLARE_WAITQUEUE(wait, current);
 
-		wait.flags |= WQ_FLAG_EXCLUSIVE;
-		__add_wait_queue_tail(&x->wait, &wait);
+		add_wait_queue_exclusive_locked(&x->wait, &wait);
 		do {
 			if (signal_pending_state(state, current)) {
 				timeout = -ERESTARTSYS;
@@ -4051,7 +4050,7 @@ do_wait_for_common(struct completion *x, long timeout, int state)
 			timeout = schedule_timeout(timeout);
 			spin_lock_irq(&x->wait.lock);
 		} while (!x->done && timeout);
-		__remove_wait_queue(&x->wait, &wait);
+		remove_wait_queue_locked(&x->wait, &wait);
 		if (!x->done)
 			return timeout;
 	}
--
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