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Message-ID: <c43f221d8e824cd2bf9746596423befc@AcuMS.aculab.com>
Date:   Mon, 1 Aug 2022 08:37:03 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Stephen Hemminger' <stephen@...workplumber.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Jonathan Corbet <corbet@....net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "Paolo Abeni" <pabeni@...hat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "Pablo Neira Ayuso" <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        "Florian Westphal" <fw@...len.de>, Borislav Petkov <bp@...e.de>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Randy Dunlap" <rdunlap@...radead.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Xin Long <lucien.xin@...il.com>,
        "Akhmat Karakotov" <hmukos@...dex-team.ru>,
        Antoine Tenart <atenart@...nel.org>,
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        Juergen Gross <jgross@...e.com>, Jens Axboe <axboe@...nel.dk>,
        Xie Yongji <xieyongji@...edance.com>,
        Chen Yu <yu.c.chen@...el.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        "Suma Hegde" <suma.hegde@....com>,
        Pali Rohár <pali@...nel.org>,
        Jeff Layton <jlayton@...nel.org>,
        Chuck Lever <chuck.lever@...cle.com>,
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        Alexandre Ghiti <alexandre.ghiti@...onical.com>,
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        Nikolay Aleksandrov <razor@...ckwall.org>,
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        Menglong Dong <imagedong@...cent.com>,
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        Daniel Borkmann <daniel@...earbox.net>,
        David Ahern <dsahern@...nel.org>,
        Roopa Prabhu <roopa@...dia.com>,
        Yajun Deng <yajun.deng@...ux.dev>,
        Yuwei Wang <wangyuweihx@...il.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        "Kuniyuki Iwashima" <kuniyu@...zon.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "Stefano Garzarella" <sgarzare@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        "Wang Qing" <wangqing@...o.com>, Yu Zhe <yuzhe@...china.com>,
        Benjamin Poirier <bpoirier@...dia.com>,
        Victor Erminpour <victor.erminpour@...cle.com>,
        "GONG, Ruiqi" <gongruiqi1@...wei.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:MIPS" <linux-mips@...r.kernel.org>,
        "open list:LINUX FOR POWERPC (32-BIT AND 64-BIT)" 
        <linuxppc-dev@...ts.ozlabs.org>,
        "open list:NETFILTER" <netfilter-devel@...r.kernel.org>,
        "open list:NETFILTER" <coreteam@...filter.org>
Subject: RE: [RFC] Remove DECNET support from kernel

From: Stephen Hemminger
> Sent: 31 July 2022 20:06
> To: netdev@...r.kernel.org
> 
> Decnet is an obsolete network protocol that receives more attention
> from kernel janitors than users. It belongs in computer protocol
> history museum not in Linux kernel.
> 
> It has been Orphaned in kernel since 2010.
> And the documentation link on Sourceforge says it is abandoned there.

It was pretty much obsolete when I was writing ethernet drivers
in the early 1990's.
Sort of surprising support ever got into Linux in the first place!

Remember it requires the ethernet MAC address be set to a
locally assigned value that is the machine's 'node number'.

Does this remove some/most/all of the [gs]et_sockopt() calls
where the length is ignored/

	David

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