Reference count the listen inpcb in the TCP SYN cache.

To make progress in unlocking TCP input path, more reference counting
is needed.  The SYN cache has a reference to the listen socket in
form of a struct tcpcb.  Instead of adding a refcount to tcpcb, it
is easier to use a struct inpcb pointer which already has a refcount.
Acquire and hold the reference while running SYN cache timer.

OK mvs@

0 files changed, 0 insertions, 0 deletions