From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cong Wang <cwang@twopensource.com>
Subject: Re: [PATCH] bridge: only provide proxy ARP when
	CONFIG_INET is enabled
Date: Tue, 13 Jan 2015 11:25:45 -0800
Message-ID: <CAHA+R7NfZMRMJ2=pq-VYU_FRdcCheAYu9OW6Hj9fwB0mcT7Xng@mail.gmail.com>
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Cc: netdev <netdev@vger.kernel.org>, Kyeyoon Park <kyeyoonp@codeaurora.org>,
	"bridge@lists.linux-foundation.org" <bridge@lists.linux-foundation.org>,
	David Miller <davem@davemloft.net>
To: Arnd Bergmann <arnd@arndb.de>
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On Tue, Jan 13, 2015 at 6:10 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> When IPV4 support is disabled, we cannot call arp_send from
> the bridge code, which would result in a kernel link error:
>
> net/built-in.o: In function `br_handle_frame_finish':
> :(.text+0x59914): undefined reference to `arp_send'
> :(.text+0x59a50): undefined reference to `arp_tbl'
>
> This makes the newly added proxy ARP support in the bridge
> code depend on the CONFIG_INET symbol and lets the compiler
> optimize the code out to avoid the link error.
>

Not sure how much sense to make CONFIG_BRIDGE depend
on CONFIG_INET, at least CONFIG_BONDING does.