Re: [PATCH net-next] s390/net: Remove NETIUCV device driver

[Simon Horman <horms@kernel.org>]

On Tue, Jul 15, 2025 at 09:42:10AM +0200, Alexandra Winter wrote:
> From: Nagamani PV <nagamani@linux.ibm.com>
> 
> The netiucv driver creates TCP/IP interfaces over IUCV between Linux
> guests on z/VM and other z/VM entities.
> 
> Rationale for removal:
> - NETIUCV connections are only supported for compatibility with
>   earlier versions and not to be used for new network setups,
>   since at least Linux kernel 4.0.
> - No known active users, use cases, or product dependencies
> - The driver is no longer relevant for z/VM networking;
>   preferred methods include:
> 	* Device pass-through (e.g., OSA, RoCE)
> 	* z/VM Virtual Switch (VSWITCH)
> 
> The IUCV mechanism itself remains supported and is actively used
> via AF_IUCV, hvc_iucv, and smsg_iucv.
> 
> Signed-off-by: Nagamani PV <nagamani@linux.ibm.com>
> Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
> Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
> ---
>  Documentation/arch/s390/driver-model.rst |   21 -
>  drivers/s390/net/Kconfig                 |   12 -
>  drivers/s390/net/Makefile                |    1 -
>  drivers/s390/net/netiucv.c               | 2083 ----------------------
>  4 files changed, 2117 deletions(-)
>  delete mode 100644 drivers/s390/net/netiucv.c

Less is more :)

Reviewed-by: Simon Horman <horms@kernel.org>