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tcp: tcp_make_synack() consumes dst parameter

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tcp_make_synack() clones the dst, and callers release it.

We can avoid two atomic operations per SYNACK if tcp_make_synack()
consumes dst instead of cloning it.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2012-06-03 20:33:21 +00:00
committed by David S. Miller
parent 90ba9b1986
commit 4aea39c11c
3 changed files with 14 additions and 6 deletions
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1
net/ipv6/tcp_ipv6.c
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@@ -522,7 +522,6 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
done:
if (opt && opt != np->opt)
sock_kfree_s(sk, opt, opt->tot_len);
dst_release(dst);
return err;
}