netdev - Re: [PATCH net] tipc: not enable tipc when ipv6 works as a module

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Date:   Mon, 17 Aug 2020 14:34:38 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     xiyou.wangcong@...il.com
Cc:     rdunlap@...radead.org, lucien.xin@...il.com,
        netdev@...r.kernel.org, jmaloy@...hat.com, ying.xue@...driver.com,
        tipc-discussion@...ts.sourceforge.net
Subject: Re: [PATCH net] tipc: not enable tipc when ipv6 works as a module

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Mon, 17 Aug 2020 11:55:55 -0700

> On Mon, Aug 17, 2020 at 11:49 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>>
>> It just restricts how TIPC can be built, so that
>> TIPC=y and IPV6=m cannot happen together, which causes
>> a build error.
> 
> It also disallows TIPC=m and IPV6=m, right?

That combination is allowed.

The whole "X || X=n" construct means X must be off or equal to the
value of the Kconfig entry this dependency is for.

Thus you'll see "depends IPV6 || IPV6=n" everywhere.