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    Subject[PATCH 5.19 087/365] net: atm: bring back zatm uAPI
    Date
    From: Jakub Kicinski <kuba@kernel.org>

    commit c2e75634cbe368065f140dd30bf8b1a0355158fd upstream.

    Jiri reports that linux-atm does not build without this header.
    Bring it back. It's completely dead code but we can't break
    the build for user space :(

    Reported-by: Jiri Slaby <jirislaby@kernel.org>
    Fixes: 052e1f01bfae ("net: atm: remove support for ZeitNet ZN122x ATM devices")
    Link: https://lore.kernel.org/all/8576aef3-37e4-8bae-bab5-08f82a78efd3@kernel.org/
    Link: https://lore.kernel.org/r/20220810164547.484378-1-kuba@kernel.org
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    include/uapi/linux/atm_zatm.h | 47 +++++++++++++++++++++++++++++++++++
    1 file changed, 47 insertions(+)
    create mode 100644 include/uapi/linux/atm_zatm.h

    diff --git a/include/uapi/linux/atm_zatm.h b/include/uapi/linux/atm_zatm.h
    new file mode 100644
    index 000000000000..5135027b93c1
    --- /dev/null
    +++ b/include/uapi/linux/atm_zatm.h
    @@ -0,0 +1,47 @@
    +/* 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
    --
    2.37.2


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