[DCCP]: Add FIXME for send_delayed_ack
This adds a FIXME to signal that the function dccp_send_delayed_ack is nowhere used in the entire DCCP/CCID code. Using a delayed Ack timer is suggested in 11.3 of RFC 4340, but it has also rather subtle implications for the Ack-Ratio-accounting. CCID2 does not use this (maybe it should). I think leaving the function in is good, in case someone wants to implement this. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
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@ -209,7 +209,6 @@ extern void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
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extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
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extern void dccp_send_ack(struct sock *sk);
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extern void dccp_send_delayed_ack(struct sock *sk);
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extern void dccp_reqsk_send_ack(struct sk_buff *sk, struct request_sock *rsk);
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extern void dccp_send_sync(struct sock *sk, const u64 seq,
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@ -477,6 +477,7 @@ void dccp_send_ack(struct sock *sk)
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EXPORT_SYMBOL_GPL(dccp_send_ack);
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/* FIXME: Is this still necessary (11.3) - currently nowhere used by DCCP. */
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void dccp_send_delayed_ack(struct sock *sk)
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{
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struct inet_connection_sock *icsk = inet_csk(sk);
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