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Date:   Thu, 17 Jan 2019 10:07:43 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     yupeng <yupeng0921@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: [PATCH net-next] remove TWKilled counter

On Thu, Jan 17, 2019 at 3:43 AM yupeng <yupeng0921@...il.com> wrote:
> diff --git a/include/uapi/linux/snmp.h b/include/uapi/linux/snmp.h
> index 86dc24a96c90..fb0a17337bf2 100644
> --- a/include/uapi/linux/snmp.h
> +++ b/include/uapi/linux/snmp.h
> @@ -178,7 +178,6 @@ enum
>         LINUX_MIB_ARPFILTER,                    /* ArpFilter */
>         LINUX_MIB_TIMEWAITED,                   /* TimeWaited */
>         LINUX_MIB_TIMEWAITRECYCLED,             /* TimeWaitRecycled */
> -       LINUX_MIB_TIMEWAITKILLED,               /* TimeWaitKilled */
>         LINUX_MIB_PAWSACTIVEREJECTED,           /* PAWSActiveRejected */
>         LINUX_MIB_PAWSESTABREJECTED,            /* PAWSEstabRejected */
>         LINUX_MIB_DELAYEDACKS,                  /* DelayedACKs */

This is no way to go, it is breaking user-space.

You should at least keep this definition even if this counter is unused.

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