linux-kernel - Re: Recent wireless breakage (ipw2200, iwconfig, NetworkManager)

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Message-Id: <20070305173822.d48c4004.akpm@linux-foundation.org>
Date:	Mon, 5 Mar 2007 17:38:22 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Greg KH <greg@...ah.com>
Cc:	Theodore Tso <tytso@....edu>, Bron Gondwana <brong@...tmail.fm>,
	Matt Mackall <mpm@...enic.com>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, yi.zhu@...el.com, jketreno@...ux.intel.com
Subject: Re: Recent wireless breakage (ipw2200, iwconfig, NetworkManager)

On Mon, 5 Mar 2007 17:17:09 -0800
Greg KH <greg@...ah.com> wrote:

> On Mon, Mar 05, 2007 at 05:08:49PM -0800, Andrew Morton wrote:
> > On Mon, 5 Mar 2007 19:56:25 -0500
> > Theodore Tso <tytso@....edu> wrote:
> > 
> > > So the question really is are we really done making changes to sysfs,
> > > or maybe what we should do is talk about major version numbers to
> > > sysfs.
> > 
> > Perhaps using a config option wasn't the right way to do this - a kernel
> > boot parameter might be better.
> 
> Ok, I have no problem with that if people really want it.  But give me
> the option to also make it a config option so I don't have to change our
> bootloaders too.

Sometimes we provide a config option which provides the default version of
the boot option.  So:

	CONFIG_SYSFS_VERSION=1.2

and

	if (user_provided_sysfs_version == NULL)
		user_provided_sysfs_version = CONFIG_SYSFS_VERSION;


> Does that sound acceptable?

If we make CONFIG_SYSFS_DEPRECATED just a boolean boot option then that
fixes this problem (we hope) but won't help us next time we want to change
something.

It all depends on whether sysfs is finished yet ;)
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