tree 913926fe8c4d4d3594a4a8558aa3ac6feb80ded6
parent 6ac705b1805863b1899e85f641bb265f9e6e9d99
author Eric Dumazet <edumazet@google.com> 1443191959 -0700
committer David S. Miller <davem@davemloft.net> 1443211238 -0700

tcp: constify tcp_make_synack() socket argument

listener socket is not locked when tcp_make_synack() is called.

We better make sure no field is written.

There is one exception : Since SYNACK packets are attached to the listener
at this moment (or SYN_RECV child in case of Fast Open),
sock_wmalloc() needs to update sk->sk_wmem_alloc, but this is done using
atomic operations so this is safe.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>