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Date: Tue, 24 Feb 2026 18:05:44 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: Eric Dumazet <edumazet@google.com>
Cc: "David S . Miller" <davem@davemloft.net>, Paolo Abeni
 <pabeni@redhat.com>, Simon Horman <horms@kernel.org>, Kuniyuki Iwashima
 <kuniyu@google.com>, David Ahern <dsahern@kernel.org>,
 netdev@vger.kernel.org, eric.dumazet@gmail.com
Subject: Re: [PATCH net-next] ipv6: move ip6_dst_hoplimit() to
 net/ipv6/ip6_output.c
Message-ID: <20260224180544.3c865751@kernel.org>
In-Reply-To: <CANn89iLjKzLwPirGBY3SzrC33OioPCrnZMcGuP4PGj7GWp39eA@mail.gmail.com>
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	<20260224174909.59f52345@kernel.org>
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On Wed, 25 Feb 2026 02:52:55 +0100 Eric Dumazet wrote:
> On Wed, Feb 25, 2026 at 2:49=E2=80=AFAM Jakub Kicinski <kuba@kernel.org> =
wrote:
> >
> > On Mon, 23 Feb 2026 15:33:42 +0000 Eric Dumazet wrote: =20
> > > Move ip6_dst_hoplimit() to net/ipv6/ip6_output.c so that compiler
> > > can (auto)inline it from ip6_xmit().
> > >
> > > $ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
> > > add/remove: 0/0 grow/shrink: 1/0 up/down: 47/0 (47)
> > > Function                                     old     new   delta
> > > ip6_xmit                                    1481    1528     +47
> > > Total: Before=3D25076476, After=3D25076523, chg +0.00% =20
> >
> > allmodconfig is not happy:
> >
> > ld.lld: error: undefined symbol: ip6_dst_hoplimit =20
>=20
> Oh well, this maze of config options...

I don't recall last time we discussed removing support for IPV6=3Dm
but maybe we should consider it?