Commit f401da47 authored Oct 27, 2021 by Eric Dumazet Committed by David S. Miller Oct 28, 2021

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>

parent bd446314

net/ipv4/tcp.c

+0 −5

Original line number	Diff line number	Diff line
		@@ -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;
		}

net/mptcp/protocol.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}