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Date:   Wed, 10 Aug 2022 09:36:24 +0200
From:   Jiri Slaby <jirislaby@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net,
        pabeni@...hat.com
Cc:     netdev@...r.kernel.org, Chas Williams <3chas3@...il.com>,
        linux-atm-general@...ts.sourceforge.net,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, arnd@...db.de
Subject: Re: [PATCH net-next 3/6] net: atm: remove support for ZeitNet ZN122x
 ATM devices

On 26. 04. 22, 19:54, Jakub Kicinski wrote:
> This driver received nothing but automated fixes in the last 15 years.
> Since it's using virt_to_bus it's unlikely to be used on any modern
> platform.
...
>   delete mode 100644 include/uapi/linux/atm_zatm.h

This unfortunately breaks linux-atm:
zntune.c:18:10: fatal error: linux/atm_zatm.h: No such file or directory

The source does also:
ioctl(s,ZATM_SETPOOL,&sioc)
ioctl(s,zero ? ZATM_GETPOOLZ : ZATM_GETPOOL,&sioc)
etc.

So we should likely revert the below:

> --- a/include/uapi/linux/atm_zatm.h
> +++ /dev/null
> @@ -1,47 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> -/* atm_zatm.h - Driver-specific declarations of the ZATM driver (for use by
> -		driver-specific utilities) */
> -
> -/* Written 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
> -
> -
> -#ifndef LINUX_ATM_ZATM_H
> -#define LINUX_ATM_ZATM_H
> -
> -/*
> - * Note: non-kernel programs including this file must also include
> - * sys/types.h for struct timeval
> - */
> -
> -#include <linux/atmapi.h>
> -#include <linux/atmioc.h>
> -
> -#define ZATM_GETPOOL	_IOW('a',ATMIOC_SARPRV+1,struct atmif_sioc)
> -						/* get pool statistics */
> -#define ZATM_GETPOOLZ	_IOW('a',ATMIOC_SARPRV+2,struct atmif_sioc)
> -						/* get statistics and zero */
> -#define ZATM_SETPOOL	_IOW('a',ATMIOC_SARPRV+3,struct atmif_sioc)
> -						/* set pool parameters */
> -
> -struct zatm_pool_info {
> -	int ref_count;			/* free buffer pool usage counters */
> -	int low_water,high_water;	/* refill parameters */
> -	int rqa_count,rqu_count;	/* queue condition counters */
> -	int offset,next_off;		/* alignment optimizations: offset */
> -	int next_cnt,next_thres;	/* repetition counter and threshold */
> -};
> -
> -struct zatm_pool_req {
> -	int pool_num;			/* pool number */
> -	struct zatm_pool_info info;	/* actual information */
> -};
> -
> -#define ZATM_OAM_POOL		0	/* free buffer pool for OAM cells */
> -#define ZATM_AAL0_POOL		1	/* free buffer pool for AAL0 cells */
> -#define ZATM_AAL5_POOL_BASE	2	/* first AAL5 free buffer pool */
> -#define ZATM_LAST_POOL	ZATM_AAL5_POOL_BASE+10 /* max. 64 kB */
> -
> -#define ZATM_TIMER_HISTORY_SIZE	16	/* number of timer adjustments to
> -					   record; must be 2^n */
> -
> -#endif

thanks,
-- 
js
suse labs

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