netdev - Re: [PATCH v3] net: #ifdef inet_bind_bucket::ib

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Date:	Fri, 14 Nov 2008 01:53:26 +0300
From:	"Alexey Dobriyan" <adobriyan@...il.com>
To:	davem@...emloft.net
Cc:	dada1@...mosbay.com, netdev@...r.kernel.org
Subject: Re: [PATCH v3] net: #ifdef inet_bind_bucket::ib_net

On Wed, Nov 12, 2008 at 04:24:23AM -0800, David Miller wrote:
> From: Alexey Dobriyan <adobriyan@...il.com>
> Date: Wed, 12 Nov 2008 15:24:48 +0300
>
> > +static inline void ib_net_set(struct inet_bind_bucket *ib, struct net *net)
> > +{
> > +#ifdef CONFIG_NET_NS
> > +   ib->ib_net = net;
> > +#endif
> > +}
> > +
>
> It's basically read_pnet() hidden behind another name.
> And you'll add new "aliases" for read_pnet() over and over
> again.
>
> That makes no sense to me.

It also make no sense to expose write_pnet() for one(!) user and
simultaneously hide read_pnet() under ib_net() as committed patches do.

Something is wrong with read_pnet() as nobody suggested to mass use it
or send a patch doing it.


        #ifdef CONFIG_NET_NS
                ib->ib_net = net;
        #endif

It's _obvious_ from this code that it's a C assignment or nop. It's also
obvious depending on what config option.

        write_pnet(&ib->ib_net, net);

What is & operator doing here? Is it important? '&' is syntaxic noise.

And netns assignments are exactly this: assigment or a nop.
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