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>

1 files changed, 0 insertions, 67 deletions

diff --git a/include/linux/yam.h b/include/linux/yam.h
deleted file mode 100644
index a29b04fa1e66..000000000000
--- a/include/linux/yam.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*****************************************************************************/
-
-/*
- *	yam.h  -- YAM radio modem driver.
- *
- *	Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
- *	Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- *  Please note that the GPL allows you to use the driver, NOT the radio.
- *  In order to use the radio, you need a license from the communications
- *  authority of your country.
- */
-
-/*****************************************************************************/
-
-#define SIOCYAMRESERVED	(0)
-#define SIOCYAMSCFG 	(1)	/* Set configuration */
-#define SIOCYAMGCFG 	(2)	/* Get configuration */
-#define SIOCYAMSMCS 	(3)	/* Set mcs data */
-
-#define YAM_IOBASE   (1 << 0)
-#define YAM_IRQ      (1 << 1)
-#define YAM_BITRATE  (1 << 2) /* Bit rate of radio port ->57600 */
-#define YAM_MODE     (1 << 3) /* 0=simplex 1=duplex 2=duplex+tempo */
-#define YAM_HOLDDLY  (1 << 4) /* duplex tempo (sec) */
-#define YAM_TXDELAY  (1 << 5) /* Tx Delay (ms) */
-#define YAM_TXTAIL   (1 << 6) /* Tx Tail  (ms) */
-#define YAM_PERSIST  (1 << 7) /* Persist  (ms) */
-#define YAM_SLOTTIME (1 << 8) /* Slottime (ms) */
-#define YAM_BAUDRATE (1 << 9) /* Baud rate of rs232 port ->115200 */
-
-#define YAM_MAXBITRATE  57600
-#define YAM_MAXBAUDRATE 115200
-#define YAM_MAXMODE     2
-#define YAM_MAXHOLDDLY  99
-#define YAM_MAXTXDELAY  999
-#define YAM_MAXTXTAIL   999
-#define YAM_MAXPERSIST  255
-#define YAM_MAXSLOTTIME 999
-
-#define YAM_FPGA_SIZE	5302
-
-struct yamcfg {
-	unsigned int mask;		/* Mask of commands */
-	unsigned int iobase;	/* IO Base of COM port */
-	unsigned int irq;		/* IRQ of COM port */
-	unsigned int bitrate;	/* Bit rate of radio port */
-	unsigned int baudrate;	/* Baud rate of the RS232 port */
-	unsigned int txdelay;	/* TxDelay */
-	unsigned int txtail;	/* TxTail */
-	unsigned int persist;	/* Persistence */
-	unsigned int slottime;	/* Slottime */
-	unsigned int mode;		/* mode 0 (simp), 1(Dupl), 2(Dupl+delay) */
-	unsigned int holddly;	/* PTT delay in FullDuplex 2 mode */
-};
-
-struct yamdrv_ioctl_cfg {
-	int cmd;
-	struct yamcfg cfg;
-};
-
-struct yamdrv_ioctl_mcs {
-	int cmd;
-	unsigned int bitrate;
-	unsigned char bits[YAM_FPGA_SIZE];
-};