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linux-sg2042
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tcp: no longer set skb->reserved_tailroom 

TCP/MPTCP sendmsg() no longer puts payload in skb->head,
we can remove not needed code.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2021-10-27 13:19:20 -07:00 committed by David S. Miller
parent bd44631471
commit f401da475f
2 changed files with 0 additions and 6 deletions
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5
net/ipv4/tcp.c
View File

@ -876,11 +876,6 @@ struct sk_buff *tcp_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp,
}
if (likely(mem_scheduled)) {
skb_reserve(skb, MAX_TCP_HEADER);
/*
* Make sure that we have exactly size bytes
* available to the caller, no more, no less.
*/
skb->reserved_tailroom = skb->end - skb->tail - size;
INIT_LIST_HEAD(&skb->tcp_tsorted_anchor);
return skb;
}

1
net/mptcp/protocol.c
View File

@ -1174,7 +1174,6 @@ static struct sk_buff *__mptcp_do_alloc_tx_skb(struct sock *sk, gfp_t gfp)
if (likely(skb)) {
if (likely(__mptcp_add_ext(skb, gfp))) {
skb_reserve(skb, MAX_TCP_HEADER);
skb->reserved_tailroom = skb->end - skb->tail;
INIT_LIST_HEAD(&skb->tcp_tsorted_anchor);
return skb;
}