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[NET]: Transform skb_queue_len() binary tests into skb_queue_empty()

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This is part of the grand scheme to eliminate the qlen
member of skb_queue_head, and subsequently remove the
'list' member of sk_buff.

Most users of skb_queue_len() want to know if the queue is
empty or not, and that's trivially done with skb_queue_empty()
which doesn't use the skb_queue_head->qlen member and instead
uses the queue list emptyness as the test.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2005-07-08 14:57:23 -07:00
parent a92b7b8057
commit b03efcfb21
34 changed files with 84 additions and 89 deletions
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11
net/ipv4/tcp_input.c
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@@ -2802,7 +2802,7 @@ static void tcp_sack_remove(struct tcp_sock *tp)
int this_sack;
/* Empty ofo queue, hence, all the SACKs are eaten. Clear. */
if (skb_queue_len(&tp->out_of_order_queue) == 0) {
if (skb_queue_empty(&tp->out_of_order_queue)) {
tp->rx_opt.num_sacks = 0;
tp->rx_opt.eff_sacks = tp->rx_opt.dsack;
return;
@@ -2935,13 +2935,13 @@ queue_and_out:
if(th->fin)
tcp_fin(skb, sk, th);
if (skb_queue_len(&tp->out_of_order_queue)) {
if (!skb_queue_empty(&tp->out_of_order_queue)) {
tcp_ofo_queue(sk);
/* RFC2581. 4.2. SHOULD send immediate ACK, when
* gap in queue is filled.
*/
if (!skb_queue_len(&tp->out_of_order_queue))
if (skb_queue_empty(&tp->out_of_order_queue))
tp->ack.pingpong = 0;
}
@@ -3249,9 +3249,8 @@ static int tcp_prune_queue(struct sock *sk)
* This must not ever occur. */
/* First, purge the out_of_order queue. */
if (skb_queue_len(&tp->out_of_order_queue)) {
NET_ADD_STATS_BH(LINUX_MIB_OFOPRUNED,
skb_queue_len(&tp->out_of_order_queue));
if (!skb_queue_empty(&tp->out_of_order_queue)) {
NET_INC_STATS_BH(LINUX_MIB_OFOPRUNED);
__skb_queue_purge(&tp->out_of_order_queue);
/* Reset SACK state. A conforming SACK implementation will