linux-kernel - Re: [PATCH 1/3] 6lowpan: add helper to get 6lowpan namespace

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Message-ID: <CAB=NE6UW23sjr0kNMtDLashm-=N6+Pekiw58rSdt5UcJXhG=5w@mail.gmail.com>
Date:	Tue, 22 Apr 2014 12:09:09 -0700
From:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
To:	Alexander Aring <alex.aring@...il.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	Alexander Smirnov <alex.bluesman.smirnov@...il.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	linux-zigbee-devel@...ts.sourceforge.net,
	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"backports@...r.kernel.org" <backports@...r.kernel.org>
Subject: Re: [PATCH 1/3] 6lowpan: add helper to get 6lowpan namespace

On Tue, Apr 22, 2014 at 11:49 AM, Alexander Aring <alex.aring@...il.com> wrote:
> On Tue, Apr 22, 2014 at 08:45:15PM +0200, Johannes Berg wrote:
>> On Tue, 2014-04-22 at 19:58 +0200, Luis R. Rodriguez wrote:
>>
>> > > > > +#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN)
>> > > > > [...]
>> > > > > +#else
>> > > > > +static inline struct netns_ieee802154_lowpan *
>> > > > > +net_ieee802154_lowpan(struct net *net)
>> > > > > +{
>> > > > > +     return NULL;
>> > > > > +}
>> > > > > +#endif
>> > > >
>> > > > Why would that be needed? If nobody compiles 802.15.4 then it seems
>> > > > nothing should reference it?
>> > > >
>> > > Indeed I think this is unnecessary, also.
>> >
>> > I wanted to be sure, and I was not. Right now 6lowpan does not depend
>> > on CONFIG_NET_NS, is this intentional? I think its fine without it
>> > but I was not sure.
>>
>> I fail to see how !CONFIG_LOWPAN is related CONFIG_NET_NS?
>>
>
> mhh, IEEE802154_6LOWPAN depends on IPV6 and I think IPV6 is related to
> CONFIG_NET_NS.

Just test compiled IEEE802154_6LOWPAN without NET_NS and then also
disabled IPV6 and it compiles, IEEE802154_6LOWPAN already depends on
IPV6.

  Luis
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