linux-kernel - Re: NETPOLL=y , NETDEVICES=n compile error ( Re: 2.6.23-rc1-mm1 )

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Message-ID: <20070731121735.GA1046@ff.dom.local>
Date:	Tue, 31 Jul 2007 14:17:35 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Gabriel C <nix.or.die@...glemail.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	jason.wessel@...driver.com, amitkale@...syssoft.com
Subject: Re: NETPOLL=y , NETDEVICES=n compile error ( Re: 2.6.23-rc1-mm1 )

On Tue, Jul 31, 2007 at 12:14:36PM +0200, Gabriel C wrote:
> Jarek Poplawski wrote:
> > On 28-07-2007 20:42, Gabriel C wrote:
> >> Andrew Morton wrote:
> >>> On Sat, 28 Jul 2007 17:44:45 +0200 Gabriel C <nix.or.die@...glemail.com> wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>> I got this compile error with a randconfig ( http://194.231.229.228/MM/randconfig-auto-82.broken.netpoll.c ).
> >>>>
> >>>> ...
> >>>>
> >>>> net/core/netpoll.c: In function 'netpoll_poll':
> >>>> net/core/netpoll.c:155: error: 'struct net_device' has no member named 'poll_controller'
> >>>> net/core/netpoll.c:159: error: 'struct net_device' has no member named 'poll_controller'
> >>>> net/core/netpoll.c: In function 'netpoll_setup':
> >>>> net/core/netpoll.c:670: error: 'struct net_device' has no member named 'poll_controller'
> >>>> make[2]: *** [net/core/netpoll.o] Error 1
> >>>> make[1]: *** [net/core] Error 2
> >>>> make: *** [net] Error 2
> >>>> make: *** Waiting for unfinished jobs....
> >>>>
> >>>> ...
> >>>>
> >>>>
> >>>> I think is because KGDBOE selects just NETPOLL.
> >>>>
> >>> Looks like it.
> >>>
> >>> Select went and selected NETPOLL and NETPOLL_TRAP but things like
> >>> CONFIG_NETDEVICES and CONFIG_NET_POLL_CONTROLLER remain unset.  `select'
> >>> remains evil.
> > ...
> >> I think there may be a logical issue ( again if I got it right ).
> >> We need some ethernet card to work with kgdboe right ? but we don't have any if !NETDEVICES && !NET_ETHERNET.
> >>
> >> So maybe some ' depends on ... && NETDEVICES!=n && NET_ETHERNET!=n ' is needed too ? 
> > 
> > IMHO, the only logical issue here is netpoll.c mustn't use 
> > CONFIG_NET_POLL_CONTROLLER code without #ifdef if it doesn't
> > add this dependency itself.
> > 
> 
> Well it does if NETDEVICES && if NET_ETHERNET which booth are N when !NETDEVICES is why KGDBOE uses select and not depends on.

"does if XXX" means may "use if XXX".

> Now KGDBOE just selects NETPOLL and NETPOLL_TRAP.
> Adding 'select CONFIG_NET_POLL_CONTROLLER' let kgdboe compiles but the question is does it work without any ethernet card ?

Why kgdboe should care what netpoll needs? So, I hope, you are adding
this select under config NETPOLL. On the other hand, if NETPOLL should
depend on NET_POLL_CONTROLLER there is probably no reason to have them
both.

The "does it work" question isn't logical issue, so it's irrelevant
here...

Jarek P.
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