[PATCH net-deletions] net: remove unused ATM protocols and legacy ATM device drivers

[David Woodhouse]

On Mon, 2026-04-20 at 19:19 -0700, Jakub Kicinski wrote:
> Remove the ATM protocol modules and PCI/SBUS ATM device drivers
> that are no longer in active use.
> 
> The ATM core protocol stack, PPPoATM, and USB DSL modem drivers
> (drivers/usb/atm/) are retained in-tree to maintain PPP over ATM
> (PPPoA) support for DSL connections.
> 
> Removed ATM protocol modules:
>  - net/atm/clip.c - Classical IP over ATM (RFC 2225)
>  - net/atm/br2684.c - RFC 2684 bridged protocols

I believe PPPoE over BR2684 is also used on ADSL lines.

https://git.kernel.org/torvalds/c/ae088d663bee strongly seems to imply
that I used to use it myself, or at least was *able* to switch to it
for testing (although I could have sworn I mostly used PPPoA).

>  - net/atm/lec.c - LAN Emulation Client (LANE)
>  - net/atm/mpc.c, mpoa_caches.c, mpoa_proc.c - Multi-Protocol Over ATM
> 
> Removed PCI/SBUS ATM device drivers (drivers/atm/):
>  - adummy, atmtcp - software/testing ATM devices
>  - eni - Efficient Networks ENI155P (OC-3, ~1995)
>  - fore200e - FORE Systems 200E PCI/SBUS (OC-3, ~1999)
>  - he - ForeRunner HE (OC-3/OC-12, ~2000)
>  - idt77105 - IDT 77105 25 Mbps ATM PHY
>  - idt77252 - IDT 77252 NICStAR II (OC-3, ~2000)
>  - iphase - Interphase ATM PCI (OC-3/DS3/E3)
>  - lanai - Efficient Networks Speedstream 3010
>  - nicstar - IDT 77201 NICStAR (155/25 Mbps, ~1999)
>  - solos-pci - Traverse Technologies ADSL2+ PCI (defunct vendor)

Traverse still exists: https://traverse.com.au/

I suspect they don't have a huge amount of interest in the Solos any
more, or the Geode-based SBC they sold with two of them on-board. But
OpenWrt does still support them, and I even have one here (although no
ADSL line to test it with). They were briefly popular as fully Linux-
supported ADSL routers.


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