From ccf7e72b54253f926a35fdfa0366e0cb9ba72ffd Mon Sep 17 00:00:00 2001 From: Hong zhi guo Date: Wed, 6 Jun 2012 22:36:27 +0000 Subject: [PATCH] macvtap: use prepare_to_wait/finish_wait to ensure mb instead of raw assignment to current->state Signed-off-by: Hong Zhiguo Signed-off-by: David S. Miller --- drivers/net/macvtap.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 2ee56de7b0ca..0737bd4d1669 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -847,13 +847,12 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q, struct kiocb *iocb, const struct iovec *iv, unsigned long len, int noblock) { - DECLARE_WAITQUEUE(wait, current); + DEFINE_WAIT(wait); struct sk_buff *skb; ssize_t ret = 0; - add_wait_queue(sk_sleep(&q->sk), &wait); while (len) { - current->state = TASK_INTERRUPTIBLE; + prepare_to_wait(sk_sleep(&q->sk), &wait, TASK_INTERRUPTIBLE); /* Read frames from the queue */ skb = skb_dequeue(&q->sk.sk_receive_queue); @@ -875,8 +874,7 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q, struct kiocb *iocb, break; } - current->state = TASK_RUNNING; - remove_wait_queue(sk_sleep(&q->sk), &wait); + finish_wait(sk_sleep(&q->sk), &wait); return ret; } -- 2.39.5