linux-kernel - Re: [PATCH 4/6] drivers:misc: sources for Init manager module

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Message-ID: <20100324162616.GA9257@suse.de>
Date:	Wed, 24 Mar 2010 09:26:16 -0700
From:	Greg KH <gregkh@...e.de>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Pavan Savoy <pavan_savoy@...oo.co.in>,
	PavanSavoy <pavan_savoy@...com>,
	"alan@...rguk.ukuu.org.uk" <alan@...rguk.ukuu.org.uk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/6] drivers:misc: sources for Init manager module

On Wed, Mar 24, 2010 at 09:11:45AM -0700, Marcel Holtmann wrote:
> > I wanted to somehow put this in staging because then it would probably have a thorough architectural review process.
> > Some details about this driver - 
> > 
> > 1. This driver will be used by Bluetooth-BlueZ/FM-V4L2 and GPS (probably character device driver) using the EXPORTED symbols (-register/_unregister).
> > 
> > 2. Much like the hciattach daemon which maintains N_HCI bluetooth line discipline, this driver will also have a User-Space  N_TI_WL Init manager (UIM) maintaining the Line discipline.
> 
> can you explain why you think this is needed and we can not interface
> this directly. If it is a serial port, what protocol does it talk?
> 
> > 3. Because of the UIM should know when to install/uninstall line discipline, the /sys entry is created a root called UIM (a new kobject) and UIM daemon would write it's PID to it.
> 
> I don't understand this. This sounds like a broken concept to me.

I also agree, those sysfs files are not acceptable, and will not work
as-designed due to the pid namespace issues :(

thanks,

greg k-h
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