linux-kernel - Re: [PATCH] Support kernel/hotplug sysctl variable when !CONFIG

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Date:	Mon, 7 Jun 2010 11:16:51 -0700
From:	Greg KH <gregkh@...e.de>
To:	Randy Dunlap <randy.dunlap@...cle.COM>
Cc:	Ian Abbott <abbotti@....co.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Support kernel/hotplug sysctl variable when !CONFIG_NET

On Mon, Jun 07, 2010 at 11:11:45AM -0700, Randy Dunlap wrote:
> On Mon, 7 Jun 2010 10:43:50 -0700 Greg KH wrote:
> 
> > On Mon, Jun 07, 2010 at 12:57:12PM +0100, Ian Abbott wrote:
> > > From: Ian Abbott <abbotti@....co.uk>
> > > 
> > > The kernel/hotplug sysctl variable (/proc/sys/kernel/hotplug file) was
> > > made conditional on CONFIG_NET by commit
> > > f743ca5e10f4145e0b3e6d11b9b46171e16af7ce (applied in 2.6.18) to fix
> > > problems with undefined references in 2.6.16 when CONFIG_HOTPLUG=y &&
> > > !CONFIG_NET, but this restriction is no longer needed.
> 
> Ack, builds for me on x86_64 when CONFIG_NET is not enabled.
> 
> > Why is this restriction no longer needed?  What changed?
> 
> 
> commit cd3772e6898c6386f21d2958346d6dd57d4204f5
> Author: Ming Lei <tom.leiming@...il.com>
> Date:   Sun Nov 16 18:22:09 2008 +0800
> 
>     kernel/ksysfs.c:fix dependence on CONFIG_NET
>     
>     Access to uevent_seqnum and uevent_helper does not need to
>     depend on CONFIG_NET, so remove it.
>     
>     Signed-off-by: Ming Lei <tom.leiming@...il.com>
>     Cc: Kay Sievers <kay.sievers@...y.org>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

So something back in 2008 changed which requires a change now?

I'm still confused, what use case calls for the original patch here
being made?  Who wants to modify this option with CONFIG_NET disabled on
their machine?

thanks,

greg k-h
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