[{"id":3679766,"web_url":"http://patchwork.ozlabs.org/comment/3679766/","msgid":"<c7506c225ce22a71c03abc2673823cf84bbb5b0d.camel@infradead.org>","date":"2026-04-21T09:26:18","subject":"Re: [PATCH net-deletions] net: remove unused ATM protocols and\n legacy ATM device drivers","submitter":{"id":26,"url":"http://patchwork.ozlabs.org/api/people/26/","name":"David Woodhouse","email":"dwmw2@infradead.org"},"content":"On Mon, 2026-04-20 at 19:19 -0700, Jakub Kicinski wrote:\n> Remove the ATM protocol modules and PCI/SBUS ATM device drivers\n> that are no longer in active use.\n> \n> The ATM core protocol stack, PPPoATM, and USB DSL modem drivers\n> (drivers/usb/atm/) are retained in-tree to maintain PPP over ATM\n> (PPPoA) support for DSL connections.\n> \n> Removed ATM protocol modules:\n>  - net/atm/clip.c - Classical IP over ATM (RFC 2225)\n>  - net/atm/br2684.c - RFC 2684 bridged protocols\n\nI believe PPPoE over BR2684 is also used on ADSL lines.\n\nhttps://git.kernel.org/torvalds/c/ae088d663bee strongly seems to imply\nthat I used to use it myself, or at least was *able* to switch to it\nfor testing (although I could have sworn I mostly used PPPoA).\n\n>  - net/atm/lec.c - LAN Emulation Client (LANE)\n>  - net/atm/mpc.c, mpoa_caches.c, mpoa_proc.c - Multi-Protocol Over ATM\n> \n> Removed PCI/SBUS ATM device drivers (drivers/atm/):\n>  - adummy, atmtcp - software/testing ATM devices\n>  - eni - Efficient Networks ENI155P (OC-3, ~1995)\n>  - fore200e - FORE Systems 200E PCI/SBUS (OC-3, ~1999)\n>  - he - ForeRunner HE (OC-3/OC-12, ~2000)\n>  - idt77105 - IDT 77105 25 Mbps ATM PHY\n>  - idt77252 - IDT 77252 NICStAR II (OC-3, ~2000)\n>  - iphase - Interphase ATM PCI (OC-3/DS3/E3)\n>  - lanai - Efficient Networks Speedstream 3010\n>  - nicstar - IDT 77201 NICStAR (155/25 Mbps, ~1999)\n>  - solos-pci - Traverse Technologies ADSL2+ PCI (defunct vendor)\n\nTraverse still exists: https://traverse.com.au/\n\nI suspect they don't have a huge amount of interest in the Solos any\nmore, or the Geode-based SBC they sold with two of them on-board. But\nOpenWrt does still support them, and I even have one here (although no\nADSL line to test it with). They were briefly popular as fully Linux-\nsupported ADSL routers.","headers":{"Return-Path":"\n <linuxppc-dev+bounces-19872-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=PfnMRIXP;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19872-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)","lists.ozlabs.org;\n arc=none smtp.remote-ip=\"2001:8b0:10b:1:d65d:64ff:fe57:4e05\"","lists.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=infradead.org","lists.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=PfnMRIXP;\n\tdkim-atps=neutral","lists.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=desiato.srs.infradead.org\n (client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; 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See http://www.infradead.org/rpr.html","X-Spam-Status":"No, score=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"}},{"id":3679834,"web_url":"http://patchwork.ozlabs.org/comment/3679834/","msgid":"<aedkZ5bizasuBPI8@gondor.apana.org.au>","date":"2026-04-21T11:49:59","subject":"Re: [PATCH net-deletions] net: remove unused ATM protocols and\n legacy ATM device drivers","submitter":{"id":357,"url":"http://patchwork.ozlabs.org/api/people/357/","name":"Herbert Xu","email":"herbert@gondor.apana.org.au"},"content":"On Tue, Apr 21, 2026 at 10:26:18AM +0100, David Woodhouse wrote:\n>\n> I suspect they don't have a huge amount of interest in the Solos any\n> more, or the Geode-based SBC they sold with two of them on-board. But\n> OpenWrt does still support them, and I even have one here (although no\n> ADSL line to test it with). They were briefly popular as fully Linux-\n> supported ADSL routers.\n\nADSL is history, it only ever made sense in rich countries where\nphysical copper cables were pre-installed in homes.  While rich\ncountries have moved to fibre, the rest of the world won't use\nADSL either because there is no copper cable to begin with.  So\nit's actually cheaper to just lay a fibre cable for a new install.\n\nCheers,","headers":{"Return-Path":"\n <linuxppc-dev+bounces-19878-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gondor.apana.org.au header.i=@gondor.apana.org.au\n header.a=rsa-sha256 header.s=h01 header.b=cb0uNtWu;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19878-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)","lists.ozlabs.org;\n arc=none smtp.remote-ip=180.181.231.80","lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=gondor.apana.org.au","lists.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gondor.apana.org.au header.i=@gondor.apana.org.au\n header.a=rsa-sha256 header.s=h01 header.b=cb0uNtWu;\n\tdkim-atps=neutral","lists.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gondor.apana.org.au\n (client-ip=180.181.231.80; 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lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=gondor.apana.org.au;\n dkim=pass (2048-bit key;\n unprotected) header.d=gondor.apana.org.au header.i=@gondor.apana.org.au\n header.a=rsa-sha256 header.s=h01 header.b=cb0uNtWu; dkim-atps=neutral;\n spf=pass (client-ip=180.181.231.80; helo=abb.hmeau.com;\n envelope-from=herbert@gondor.apana.org.au;\n receiver=lists.ozlabs.org) smtp.mailfrom=gondor.apana.org.au","DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=gondor.apana.org.au; s=h01; h=In-Reply-To:Content-Type:MIME-Version:\n\tReferences:Message-ID:Subject:Cc:To:From:Date:cc:to:subject:message-id:date:\n\tfrom:content-type:reply-to; bh=OwjntzVNeDypYl+gb8gCC9m3YpwtU8u86yLeBxwqWjE=;\n\tb=cb0uNtWuFWwCwtmeaDWAtvbkC3Y8S6XHqngK5Wla5CxIYXescDcvY0ZvESkjzs7A7+GGcSLzH1H\n\taWkhry4AoKM/X34MbmXMSHJ8Jk5FJoJFRuz4aSSt3EHCuRn4km27h2yChnahNdoNEFROqX7IAyxH3\n\t/xS6JeQ6icnUP8PU3MGN5/2+Ht5vSSPmwSmMQFkpuTMrXo7vy9IEmNeZaMb0tQ0bPTcBc6Iqk1jzI\n\t9ofZNvzOr2qUKNoSsJObv4qmR8V8vXWaw9/Tzb7VitfQ1s6LO48RCOr5r397r2maHXmbic/hx0MFw\n\tQxqwwuA3NfDRVgGHR6H7wBEsAfpjnmVjwiKw==;","Date":"Tue, 21 Apr 2026 19:49:59 +0800","From":"Herbert Xu <herbert@gondor.apana.org.au>","To":"David Woodhouse <dwmw2@infradead.org>","Cc":"Jakub Kicinski <kuba@kernel.org>, davem@davemloft.net,\n\tnetdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com,\n\tandrew+netdev@lunn.ch, horms@kernel.org, corbet@lwn.net,\n\tskhan@linuxfoundation.org, linux@armlinux.org.uk,\n\ttsbogend@alpha.franken.de, maddy@linux.ibm.com, mpe@ellerman.id.au,\n\tnpiggin@gmail.com, chleroy@kernel.org, 3chas3@gmail.com,\n\trazor@blackwall.org, idosch@nvidia.com, jani.nikula@intel.com,\n\tmchehab+huawei@kernel.org, tytso@mit.edu, geert@linux-m68k.org,\n\tebiggers@kernel.org, johannes.berg@intel.com,\n\tjonathan.cameron@huawei.com, kees@kernel.org, kuniyu@google.com,\n\tfourier.thomas@gmail.com, andriy.shevchenko@intel.com,\n\trdunlap@infradead.org, akpm@linux-foundation.org,\n\tlinux-doc@vger.kernel.org, linux-mips@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org, bridge@lists.linux.dev","Subject":"Re: [PATCH net-deletions] net: remove unused ATM protocols and\n legacy ATM device drivers","Message-ID":"<aedkZ5bizasuBPI8@gondor.apana.org.au>","References":"<20260421021943.1295109-1-kuba@kernel.org>\n <c7506c225ce22a71c03abc2673823cf84bbb5b0d.camel@infradead.org>","X-Mailing-List":"linuxppc-dev@lists.ozlabs.org","List-Id":"<linuxppc-dev.lists.ozlabs.org>","List-Help":"<mailto:linuxppc-dev+help@lists.ozlabs.org>","List-Owner":"<mailto:linuxppc-dev+owner@lists.ozlabs.org>","List-Post":"<mailto:linuxppc-dev@lists.ozlabs.org>","List-Archive":"<https://lore.kernel.org/linuxppc-dev/>,\n  <https://lists.ozlabs.org/pipermail/linuxppc-dev/>","List-Subscribe":"<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n  <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n  <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>","List-Unsubscribe":"<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<c7506c225ce22a71c03abc2673823cf84bbb5b0d.camel@infradead.org>","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"}},{"id":3679837,"web_url":"http://patchwork.ozlabs.org/comment/3679837/","msgid":"<CAMuHMdU96F_42faeqNzDwaXks7mFrLrkPSJB_QTwxEn9HmVWpQ@mail.gmail.com>","date":"2026-04-21T11:57:34","subject":"Re: [PATCH net-deletions] net: remove unused ATM protocols and legacy\n ATM device drivers","submitter":{"id":703,"url":"http://patchwork.ozlabs.org/api/people/703/","name":"Geert Uytterhoeven","email":"geert@linux-m68k.org"},"content":"Hi Herbert,\n\nOn Tue, 21 Apr 2026 at 13:51, Herbert Xu <herbert@gondor.apana.org.au> wrote:\n> On Tue, Apr 21, 2026 at 10:26:18AM +0100, David Woodhouse wrote:\n> > I suspect they don't have a huge amount of interest in the Solos any\n> > more, or the Geode-based SBC they sold with two of them on-board. But\n> > OpenWrt does still support them, and I even have one here (although no\n> > ADSL line to test it with). They were briefly popular as fully Linux-\n> > supported ADSL routers.\n>\n> ADSL is history, it only ever made sense in rich countries where\n> physical copper cables were pre-installed in homes.  While rich\n> countries have moved to fibre, the rest of the world won't use\n> ADSL either because there is no copper cable to begin with.  So\n> it's actually cheaper to just lay a fibre cable for a new install.\n\nI am afraid the move to fibre hasn't been completed yet.\nADSL (VDSL2?) is still being used.\n\nGr{oetje,eeting}s,\n\n                        Geert","headers":{"Return-Path":"\n <linuxppc-dev+bounces-19879-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19879-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)","lists.ozlabs.org;\n arc=none smtp.remote-ip=209.85.221.180","lists.ozlabs.org;\n dmarc=none (p=none dis=none) header.from=linux-m68k.org","lists.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com\n (client-ip=209.85.221.180; 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charset=\"UTF-8\"","X-Spam-Status":"No, score=0.0 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN,\n\tFREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,\n\tRCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"}},{"id":3679842,"web_url":"http://patchwork.ozlabs.org/comment/3679842/","msgid":"<6f7f93d389a0d209886a34898badd7d59908fe0f.camel@infradead.org>","date":"2026-04-21T12:06:53","subject":"Re: [PATCH net-deletions] net: remove unused ATM protocols and\n legacy ATM device drivers","submitter":{"id":26,"url":"http://patchwork.ozlabs.org/api/people/26/","name":"David Woodhouse","email":"dwmw2@infradead.org"},"content":"On Tue, 2026-04-21 at 13:57 +0200, Geert Uytterhoeven wrote:\n> Hi Herbert,\n> \n> On Tue, 21 Apr 2026 at 13:51, Herbert Xu <herbert@gondor.apana.org.au> wrote:\n> > On Tue, Apr 21, 2026 at 10:26:18AM +0100, David Woodhouse wrote:\n> > > I suspect they don't have a huge amount of interest in the Solos any\n> > > more, or the Geode-based SBC they sold with two of them on-board. But\n> > > OpenWrt does still support them, and I even have one here (although no\n> > > ADSL line to test it with). They were briefly popular as fully Linux-\n> > > supported ADSL routers.\n> > \n> > ADSL is history, it only ever made sense in rich countries where\n> > physical copper cables were pre-installed in homes.  While rich\n> > countries have moved to fibre, the rest of the world won't use\n> > ADSL either because there is no copper cable to begin with.  So\n> > it's actually cheaper to just lay a fibre cable for a new install.\n> \n> I am afraid the move to fibre hasn't been completed yet.\n> ADSL (VDSL2?) is still being used.\n\nVSDL is different, and isn't ATM-based. But even ADSL is still in use;\nin the UK some rural areas haven't got fibre yet.","headers":{"Return-Path":"\n <linuxppc-dev+bounces-19880-incoming=patchwork.ozlabs.org@lists.ozlabs.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=HEiBlf68;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19880-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)","lists.ozlabs.org;\n arc=none smtp.remote-ip=\"2001:8b0:10b:1:d65d:64ff:fe57:4e05\"","lists.ozlabs.org;\n dmarc=pass (p=none dis=none) header.from=infradead.org","lists.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=HEiBlf68;\n\tdkim-atps=neutral","lists.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=desiato.srs.infradead.org\n (client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; 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