Re: [PATCH v1 net-next 2/2] ipv6: Remove IPV6_ADDRFORM.

On Fri,  4 Sep 2026 03:35:29 +0000
Kuniyuki Iwashima [off-list ref] wrote:

Recently, IPV6_ADDRFORM has received many AI-driven bug reports.
Fixing them properly would needlessly churn the fast paths in TCP
and UDP.

IPV6_ADDRFORM was initially introduced in RFC 2133 in 1997,
but only two years later, it was removed from RFC 2553 in 1999.

In 2026, modern applications natively support dual-stack sockets;
notably, systemd's socket activation does not use IPV6_ADDRFORM.

Also, getsockopt(IPV6_ADDRFORM) can be replaced with SO_DOMAIN.

Let's remove IPV6_ADDRFORM.

How does the ipv6(7) man page get updated to match?

...

-			module_put(THIS_MODULE);

That wasn't good...

David