linux-kernel - Re: [ANN] WiMAX stack and drivers for Intel WiMAX Link 5050

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Message-ID: <20080409203138.GH30885@one.firstfloor.org>
Date:	Wed, 9 Apr 2008 22:31:38 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Inaky Perez-Gonzalez <inaky@...ux.intel.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Inaky Perez-Gonzalez 
	<public-inaky-VuQAYsv1563Yd54FQh9/CA@...h.gmane.org>,
	Stephen Hemminger 
	<public-stephen.hemminger-ZtmgI6mnKB3QT0dZR+AlfA@...h.gmane.org>,
	public-wimax-BPSAo7wm5JOHVYUYWc+uSQ@...h.gmane.org,
	public-linux-wireless-u79uwXL29TY76Z2rM5mHXA@...h.gmane.org,
	public-netdev-u79uwXL29TY76Z2rM5mHXA@...h.gmane.org,
	public-linux-kernel-u79uwXL29TY76Z2rM5mHXA@...h.gmane.org
Subject: Re: [ANN] WiMAX stack and drivers for Intel WiMAX Link 5050



On Wed, Apr 09, 2008 at 11:09:24AM -0700, Inaky Perez-Gonzalez wrote:
> On Tuesday 08 April 2008, Andi Kleen wrote:
> 
> > > version: I anticipate the wimax API exported to user space is
> > > going to undergo a lot of changes while we all agree on what
> > > is the best interface. Because things might break, I want to
> > > make sure user space stuff can detect that and fail cleanly. 
> > > Hence the versioning. 
> > 
> > It's still a bad way to do that (I agree with Stephen on that).
> > Was also always a mess on wireless.
> > 
> > If you don't want expandable TLAs another better alternative to 
> > versions is ext2 style compatible/incompatible feature bitmaps.
> 
> Ain't that another way of saying versions? Sorry guys, but I am 

It's a related way, but an actually sane way.

With compat/incompat bitmaps user space can actually make a educated
decision if it should fail or not

-Andi

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