net: remove ax25 and amateur radio (hamradio) subsystem

Remove the amateur radio (AX.25, NET/ROM, ROSE) protocol implementation
and all associated hamradio device drivers from the kernel tree.
This set of protocols has long been a huge bug/syzbot magnet,
and since nobody stepped up to help us deal with the influx
of the AI-generated bug reports we need to move it out of tree
to protect our sanity.

The code is moved to an out-of-tree repo:
https://github.com/linux-netdev/mod-orphan
if it's cleaned up and reworked there we can accept it back.

Minimal stub headers are kept for include/net/ax25.h (AX25_P_IP,
AX25_ADDR_LEN, ax25_address) and include/net/rose.h (ROSE_ADDR_LEN)
so that the conditional integration code in arp.c and tun.c continues
to compile and work when the out-of-tree modules are loaded.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20260421021824.1293976-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

8 files changed, 0 insertions, 43 deletions

diff --git a/arch/mips/configs/bcm47xx_defconfig b/arch/mips/configs/bcm47xx_defconfig
index d10b3d4adbd1..acbab8dae53f 100644
--- a/arch/mips/configs/bcm47xx_defconfig
+++ b/arch/mips/configs/bcm47xx_defconfig
@@ -28,7 +28,6 @@ CONFIG_NETFILTER=y
 CONFIG_VLAN_8021Q=y
 CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_FQ_CODEL=y
-CONFIG_HAMRADIO=y
 CONFIG_CFG80211=y
 CONFIG_MAC80211=y
 CONFIG_MTD=y
diff --git a/arch/mips/configs/bigsur_defconfig b/arch/mips/configs/bigsur_defconfig
index 3b64e151e187..aa63ada62e28 100644
--- a/arch/mips/configs/bigsur_defconfig
+++ b/arch/mips/configs/bigsur_defconfig
@@ -84,16 +84,6 @@ CONFIG_IP_VS_FTP=m
 CONFIG_BRIDGE=m
 CONFIG_VLAN_8021Q=m
 CONFIG_VLAN_8021Q_GVRP=y
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
 CONFIG_FW_LOADER=m
 CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_NBD=m
diff --git a/arch/mips/configs/gpr_defconfig b/arch/mips/configs/gpr_defconfig
index fdd28a89e336..261730af75c7 100644
--- a/arch/mips/configs/gpr_defconfig
+++ b/arch/mips/configs/gpr_defconfig
@@ -130,17 +130,6 @@ CONFIG_NET_EMATCH_TEXT=m
 CONFIG_NET_CLS_ACT=y
 CONFIG_NET_ACT_POLICE=y
 CONFIG_NET_PKTGEN=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-# CONFIG_AX25_DAMA_SLAVE is not set
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
 CONFIG_CFG80211=y
 CONFIG_MAC80211=y
 CONFIG_MTD=y
diff --git a/arch/mips/configs/mtx1_defconfig b/arch/mips/configs/mtx1_defconfig
index 72568f8ae653..315650c6fe0b 100644
--- a/arch/mips/configs/mtx1_defconfig
+++ b/arch/mips/configs/mtx1_defconfig
@@ -176,17 +176,6 @@ CONFIG_NET_EMATCH_TEXT=m
 CONFIG_NET_CLS_ACT=y
 CONFIG_NET_ACT_POLICE=y
 CONFIG_NET_PKTGEN=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-# CONFIG_AX25_DAMA_SLAVE is not set
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
 CONFIG_BT=m
 CONFIG_BT_RFCOMM=m
 CONFIG_BT_RFCOMM_TTY=y
diff --git a/arch/mips/configs/rb532_defconfig b/arch/mips/configs/rb532_defconfig
index 30d18b084cda..a88322fe3935 100644
--- a/arch/mips/configs/rb532_defconfig
+++ b/arch/mips/configs/rb532_defconfig
@@ -95,7 +95,6 @@ CONFIG_NET_ACT_GACT=m
 CONFIG_GACT_PROB=y
 CONFIG_NET_ACT_MIRRED=m
 CONFIG_NET_ACT_PEDIT=m
-CONFIG_HAMRADIO=y
 CONFIG_MTD=y
 CONFIG_MTD_BLOCK=y
 CONFIG_MTD_BLOCK2MTD=y
diff --git a/arch/mips/configs/rm200_defconfig b/arch/mips/configs/rm200_defconfig
index b1e67ff0c4f0..ad9fbd0cbb38 100644
--- a/arch/mips/configs/rm200_defconfig
+++ b/arch/mips/configs/rm200_defconfig
@@ -147,13 +147,6 @@ CONFIG_NET_CLS_FW=m
 CONFIG_NET_CLS_U32=m
 CONFIG_NET_CLS_RSVP=m
 CONFIG_NET_CLS_RSVP6=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
 CONFIG_CONNECTOR=m
 CONFIG_PARPORT=m
 CONFIG_PARPORT_PC=m
diff --git a/arch/mips/configs/rt305x_defconfig b/arch/mips/configs/rt305x_defconfig
index 8f9701efef19..c920976bedd0 100644
--- a/arch/mips/configs/rt305x_defconfig
+++ b/arch/mips/configs/rt305x_defconfig
@@ -64,7 +64,6 @@ CONFIG_BRIDGE=y
 # CONFIG_BRIDGE_IGMP_SNOOPING is not set
 CONFIG_VLAN_8021Q=y
 CONFIG_NET_SCHED=y
-CONFIG_HAMRADIO=y
 CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_BLOCK=y
diff --git a/arch/mips/configs/xway_defconfig b/arch/mips/configs/xway_defconfig
index aae8497b6872..f1c53bbb72e9 100644
--- a/arch/mips/configs/xway_defconfig
+++ b/arch/mips/configs/xway_defconfig
@@ -66,7 +66,6 @@ CONFIG_BRIDGE=y
 # CONFIG_BRIDGE_IGMP_SNOOPING is not set
 CONFIG_VLAN_8021Q=y
 CONFIG_NET_SCHED=y
-CONFIG_HAMRADIO=y
 CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_BLOCK=y