net: remove unused ATM protocols and legacy ATM device drivers

Remove the ATM protocol modules and PCI/SBUS ATM device drivers
that are no longer in active use.

The ATM core protocol stack, PPPoATM, BR2684, and USB DSL modem
drivers (drivers/usb/atm/) are retained in-tree to maintain PPP
over ATM (PPPoA) and PPPoE-over-BR2684 support for DSL connections.
The Solos ADSL2+ PCI driver is also retained.

Removed ATM protocol modules:
 - net/atm/clip.c - Classical IP over ATM (RFC 2225)
 - 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)
 - suni - PMC S/UNI SONET PHY library

Also clean up references in:
 - net/bridge/ - remove ATM LANE hook (br_fdb_test_addr_hook,
   br_fdb_test_addr)
 - net/core/dev.c - remove br_fdb_test_addr_hook export
 - defconfig files - remove ATM driver config options

The removed code is moved to an out-of-tree module package (mod-orphan).

Acked-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260422041846.2035118-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 0 insertions, 39 deletions

diff --git a/arch/arm/configs/ixp4xx_defconfig b/arch/arm/configs/ixp4xx_defconfig
index 81199dddcde7..01d72580bcc5 100644
--- a/arch/arm/configs/ixp4xx_defconfig
+++ b/arch/arm/configs/ixp4xx_defconfig
@@ -52,9 +52,6 @@ CONFIG_IP_NF_MANGLE=m
 CONFIG_IP_NF_ARPTABLES=m
 CONFIG_IP_NF_ARPFILTER=m
 CONFIG_ATM=y
-CONFIG_ATM_CLIP=y
-CONFIG_ATM_LANE=m
-CONFIG_ATM_MPOA=m
 CONFIG_ATM_BR2684=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
@@ -108,7 +105,6 @@ CONFIG_ATA=y
 CONFIG_PATA_IXP4XX_CF=y
 CONFIG_NETDEVICES=y
 CONFIG_DUMMY=y
-CONFIG_ATM_TCP=m
 CONFIG_IXP4XX_ETH=y
 CONFIG_WAN=y
 CONFIG_HDLC=y
diff --git a/arch/mips/configs/gpr_defconfig b/arch/mips/configs/gpr_defconfig
index 261730af75c7..ed1a8f80f96e 100644
--- a/arch/mips/configs/gpr_defconfig
+++ b/arch/mips/configs/gpr_defconfig
@@ -87,9 +87,6 @@ CONFIG_BRIDGE_EBT_LOG=m
 CONFIG_IP_SCTP=m
 CONFIG_TIPC=m
 CONFIG_ATM=y
-CONFIG_ATM_CLIP=y
-CONFIG_ATM_LANE=m
-CONFIG_ATM_MPOA=m
 CONFIG_ATM_BR2684=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
@@ -104,7 +101,6 @@ CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_CBQ=m
 CONFIG_NET_SCH_HTB=m
 CONFIG_NET_SCH_HFSC=m
-CONFIG_NET_SCH_ATM=m
 CONFIG_NET_SCH_PRIO=m
 CONFIG_NET_SCH_RED=m
 CONFIG_NET_SCH_SFQ=m
@@ -156,15 +152,6 @@ CONFIG_SCSI_SAS_LIBSAS=m
 CONFIG_NETDEVICES=y
 CONFIG_NET_FC=y
 CONFIG_NETCONSOLE=m
-CONFIG_ATM_TCP=m
-CONFIG_ATM_LANAI=m
-CONFIG_ATM_ENI=m
-CONFIG_ATM_NICSTAR=m
-CONFIG_ATM_IDT77252=m
-CONFIG_ATM_IA=m
-CONFIG_ATM_FORE200E=m
-CONFIG_ATM_HE=m
-CONFIG_ATM_HE_USE_SUNI=y
 CONFIG_MIPS_AU1X00_ENET=y
 CONFIG_CICADA_PHY=m
 CONFIG_DAVICOM_PHY=m
diff --git a/arch/mips/configs/mtx1_defconfig b/arch/mips/configs/mtx1_defconfig
index 315650c6fe0b..ab7c586eaa2c 100644
--- a/arch/mips/configs/mtx1_defconfig
+++ b/arch/mips/configs/mtx1_defconfig
@@ -133,9 +133,6 @@ CONFIG_BRIDGE_EBT_LOG=m
 CONFIG_IP_SCTP=m
 CONFIG_TIPC=m
 CONFIG_ATM=y
-CONFIG_ATM_CLIP=y
-CONFIG_ATM_LANE=m
-CONFIG_ATM_MPOA=m
 CONFIG_ATM_BR2684=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
@@ -150,7 +147,6 @@ CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_CBQ=m
 CONFIG_NET_SCH_HTB=m
 CONFIG_NET_SCH_HFSC=m
-CONFIG_NET_SCH_ATM=m
 CONFIG_NET_SCH_PRIO=m
 CONFIG_NET_SCH_RED=m
 CONFIG_NET_SCH_SFQ=m
@@ -232,15 +228,6 @@ CONFIG_ARCNET_RIM_I=m
 CONFIG_ARCNET_COM20020=m
 CONFIG_ARCNET_COM20020_PCI=m
 CONFIG_ARCNET_COM20020_CS=m
-CONFIG_ATM_TCP=m
-CONFIG_ATM_LANAI=m
-CONFIG_ATM_ENI=m
-CONFIG_ATM_NICSTAR=m
-CONFIG_ATM_IDT77252=m
-CONFIG_ATM_IA=m
-CONFIG_ATM_FORE200E=m
-CONFIG_ATM_HE=m
-CONFIG_ATM_HE_USE_SUNI=y
 CONFIG_PCMCIA_3C574=m
 CONFIG_PCMCIA_3C589=m
 CONFIG_VORTEX=m
diff --git a/arch/powerpc/configs/ppc6xx_defconfig b/arch/powerpc/configs/ppc6xx_defconfig
index 6f40a275b7a9..ab5cb6c51a34 100644
--- a/arch/powerpc/configs/ppc6xx_defconfig
+++ b/arch/powerpc/configs/ppc6xx_defconfig
@@ -227,8 +227,6 @@ CONFIG_BRIDGE_EBT_LOG=m
 CONFIG_BRIDGE_EBT_NFLOG=m
 CONFIG_TIPC=m
 CONFIG_ATM=m
-CONFIG_ATM_CLIP=m
-CONFIG_ATM_LANE=m
 CONFIG_ATM_BR2684=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
@@ -240,7 +238,6 @@ CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_CBQ=m
 CONFIG_NET_SCH_HTB=m
 CONFIG_NET_SCH_HFSC=m
-CONFIG_NET_SCH_ATM=m
 CONFIG_NET_SCH_PRIO=m
 CONFIG_NET_SCH_MULTIQ=m
 CONFIG_NET_SCH_RED=m
@@ -398,12 +395,6 @@ CONFIG_NETCONSOLE=m
 CONFIG_TUN=m
 CONFIG_VETH=m
 CONFIG_VIRTIO_NET=m
-CONFIG_ATM_TCP=m
-CONFIG_ATM_LANAI=m
-CONFIG_ATM_ENI=m
-CONFIG_ATM_NICSTAR=m
-CONFIG_ATM_IDT77252=m
-CONFIG_ATM_HE=m
 CONFIG_EL3=m
 CONFIG_PCMCIA_3C574=m
 CONFIG_PCMCIA_3C589=m