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tcp: remove unnecessary skb_reset_tail_pointer()

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__pskb_trim_head() does not need to reset skb tail pointer.

Also change the comments, __pskb_pull_head() does not exist.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-06-01 14:18:36 -07:00 committed by David S. Miller
parent 80b7d81912
commit f4d0166661
1 changed files with 2 additions and 4 deletions
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6
net/ipv4/tcp_output.c
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@ -1328,9 +1328,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len,
return 0;
}
/* This is similar to __pskb_pull_head() (it will go to core/skbuff.c
* eventually). The difference is that pulled data not copied, but
* immediately discarded.
/* This is similar to __pskb_pull_tail(). The difference is that pulled
* data is not copied, but immediately discarded.
*/
static int __pskb_trim_head(struct sk_buff *skb, int len)
{
@ -1365,7 +1364,6 @@ static int __pskb_trim_head(struct sk_buff *skb, int len)
}
shinfo->nr_frags = k;
skb_reset_tail_pointer(skb);
skb->data_len -= len;
skb->len = skb->data_len;
return len;