netdev - Re: [RFC 1/2] genetlink: introduce pre_doit/post

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Message-ID: <1285886821.5137.29.camel@jlt3.sipsolutions.net>
Date:	Fri, 01 Oct 2010 00:47:01 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Julian Calaby <julian.calaby@...il.com>
Cc:	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	tgraf@...g.ch
Subject: Re: [RFC 1/2] genetlink: introduce pre_doit/post_doit hooks

On Fri, 2010-10-01 at 00:44 +0200, Johannes Berg wrote:
> On Fri, 2010-10-01 at 08:41 +1000, Julian Calaby wrote:
> 
> > >  d) include two private pointers in each info
> > >    struct passed between all these operations
> > >    including doit(). (It's two because I'll
> > >    need two in nl80211 -- can be extended.)
> > 
> > Stupid question:
> > 
> > Why not have a priv struct rather than an arbitrary array of two pointers?
> 
> It'd have to be dynamically allocated, and the "arbitrary" array of two
> pointers can be on the stack.

Maybe I should elaborate -- a priv struct basically means just a single
pointer, and then I'd have to allocate something to hold two pointers in
nl80211 and assign it to that single pointer.

johannes

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