* Pekka Savola [ref] 2005-03-31 20:48

On Thu, 31 Mar 2005, Thomas Graf wrote:

quoted

The address deletion fix is no longer needed since a better fix
has made it into iproute2. Better in terms of same hack but in
userspace so we don't confuse other netlink users.

So, does that mean that all the users are expected to always run the 
latest iproute2, so there's no need for backward-compat in the kernel?

The actual challenge in this rather trivial problem is that many scripts
rely on this wrong behaviour by doing ip a a 1.1.1.1/24 dev lo;
ip a d 1.1.1.1 dev lo; and nobody wants to break them. So even with the
kernel fix we had, old iproute2 versions still did it wrong but it gave
newer iproute2 versions a chance to work around the issue.