tree 5c202f6866cca91ded45213cbb1a3d7f75fc6749
parent 7cd0a63872ac6ef97265f07adc367ca4f984468e
author Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> 1237040581 +0000
committer David S. Miller <davem@davemloft.net> 1237172991 -0700

tcp: remove pointless .dsack/.num_sacks code

In the pure assignment case, the earlier zeroing is
still in effect.

David S. Miller raised concerns if the ifs are there to avoid
dirtying cachelines. I came to these conclusions:

> We'll be dirty it anyway (now that I check), the first "real" statement
> in tcp_rcv_established is:
>
>       tp->rx_opt.saw_tstamp = 0;
>
> ...that'll land on the same dword. :-/
>
> I suppose the blocks are there just because they had more complexity
> inside when they had to calculate the eff_sacks too (maybe it would
> have been better to just remove them in that drop-patch so you would
> have had less head-ache :-)).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>