netdev - Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace compilation error

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Date:   Tue, 07 Mar 2017 12:16:49 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     ldv@...linux.org
Cc:     xemul@...allels.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] uapi: fix linux/packet_diag.h userspace
 compilation error

From: "Dmitry V. Levin" <ldv@...linux.org>
Date: Tue, 28 Feb 2017 04:39:30 +0300

> Replace MAX_ADDR_LEN with its numeric value to fix the following
> linux/packet_diag.h userspace compilation error:
> 
> /usr/include/linux/packet_diag.h:67:17: error: 'MAX_ADDR_LEN' undeclared here (not in a function)
>   __u8 pdmc_addr[MAX_ADDR_LEN];
> 
> This is not the first case in the UAPI where the numeric value
> of MAX_ADDR_LEN is used, uapi/linux/if_link.h already does the same,
> and there are no UAPI headers besides these two that use MAX_ADDR_LEN.
> 
> The alternative fix would be to include <linux/netdevice.h> which
> pulls in other headers and a lot of definitions with them.
> 
> Signed-off-by: Dmitry V. Levin <ldv@...linux.org>

If if_link.h includes netdevice.h properly, let's try to do the same here as well.

Thanks.