Re: [PATCH] fix locking

["David S. Miller" <davem@xxxxxxxxxx>]

On Fri, 5 Sep 2003 17:26:49 -0700
Michael Rozhavsky <mike@xxxxxxxxxxxxx> wrote:

> I've found two problems with locking in networking code.

Not applied, in both cases a higher order lock guarentees
that nobody else can add elements to the list.

We only need to lock to make sure readers (who don't take
the higher level lock) see a consistent list state.

In the tcp_ipv4.c case, the higher level lock is the listening
socket lock.  In the sit.c case the higher level lock is the
RTNL semaphore.