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[NETLINK]: Avoid pointer in netlink_run_queue

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I was looking at Patrick's fix to inet_diag and it occured
to me that we're using a pointer argument to return values
unnecessarily in netlink_run_queue.  Changing it to return
the value will allow the compiler to generate better code
since the value won't have to be memory-backed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu
2007-09-16 16:24:44 -07:00
committed by David S. Miller
parent 007e3936bd
commit 0cfad07555
7 changed files with 16 additions and 14 deletions
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18
net/netlink/af_netlink.c
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@ -1629,7 +1629,7 @@ skip:
/**
* nelink_run_queue - Process netlink receive queue.
* @sk: Netlink socket containing the queue
* @qlen: Place to store queue length upon entry
* @qlen: Initial queue length
* @cb: Callback function invoked for each netlink message found
*
* Processes as much as there was in the queue upon entry and invokes
@ -1639,35 +1639,37 @@ skip:
* returns with a qlen != 0.
*
* qlen must be initialized to 0 before the initial entry, afterwards
* the function may be called repeatedly until qlen reaches 0.
* the function may be called repeatedly until the returned qlen is 0.
*
* The callback function may return -EINTR to signal that processing
* of netlink messages shall be interrupted. In this case the message
* currently being processed will NOT be requeued onto the receive
* queue.
*/
void netlink_run_queue(struct sock *sk, unsigned int *qlen,
int (*cb)(struct sk_buff *, struct nlmsghdr *))
unsigned int netlink_run_queue(struct sock *sk, unsigned int qlen,
int (*cb)(struct sk_buff *, struct nlmsghdr *))
{
struct sk_buff *skb;
if (!*qlen || *qlen > skb_queue_len(&sk->sk_receive_queue))
*qlen = skb_queue_len(&sk->sk_receive_queue);
if (!qlen || qlen > skb_queue_len(&sk->sk_receive_queue))
qlen = skb_queue_len(&sk->sk_receive_queue);
for (; *qlen; (*qlen)--) {
for (; qlen; qlen--) {
skb = skb_dequeue(&sk->sk_receive_queue);
if (netlink_rcv_skb(skb, cb)) {
if (skb->len)
skb_queue_head(&sk->sk_receive_queue, skb);
else {
kfree_skb(skb);
(*qlen)--;
qlen--;
}
break;
}
kfree_skb(skb);
}
return qlen;
}
/**