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[TCP]: Update comment about highest_sack validity 

This stale info came from the original idea, which proved to be
unnecessarily complex, sacked_out > 0 is easy to do and that when
it's going to be needed anyway (it _can_ be valid also when
sacked_out == 0 but there's not going to be a guarantee about it
for now).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen 2007-08-10 14:31:21 -07:00 committed by David S. Miller
parent e60402d0a9
commit 13dae42631
1 changed files with 2 additions and 1 deletions
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3
include/linux/tcp.h
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@ -332,7 +332,8 @@ struct tcp_sock {
struct tcp_sack_block_wire recv_sack_cache[4];
u32 highest_sack; /* Start seq of globally highest revd SACK (valid only in slowpath) */
u32 highest_sack; /* Start seq of globally highest revd SACK
* (validity guaranteed only if sacked_out > 0) */
/* from STCP, retrans queue hinting */
struct sk_buff* lost_skb_hint;