linux-kernel - Re: [PATCH 7/7] driver-core : convert semaphore to mutex in struct class

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Message-ID: <20080118062500.GA23840@suse.de>
Date:	Thu, 17 Jan 2008 22:25:00 -0800
From:	Greg KH <gregkh@...e.de>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Dave Young <hidave.darkstar@...il.com>,
	Jarek Poplawski <jarkao2@...il.com>,
	Alan Stern <stern@...land.harvard.edu>,
	stefanr@...6.in-berlin.de, David Brownell <david-b@...bell.net>,
	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 7/7] driver-core : convert semaphore to mutex in struct
	class

On Fri, Jan 18, 2008 at 04:18:43AM +0100, Kay Sievers wrote:
> On Fri, 2008-01-18 at 10:28 +0800, Dave Young wrote:
> > Then what's your opinon about the lockdep warning fix? I wonder
> > whether the "soon" means we should do mutex convert after the
> > class_device going away?
> 
> Yeah, might be better to wait until class_device is gone, otherwise you
> may need to fix stuff that is just going to be removed. Your change to
> have iterators for the class devices look like a nice preparation for
> future changes though.
> 
> Our rough plan is:
>  2.6.25:
>   - get the ~100 patches in Greg's tree (in -mm) merged :)
>  2.6.26:
> ???  - remove the 20 char limit in "struct device"
>   - get rid of "struct class_device"
>  2.6.27
>   - merge most of "struct class" and "struct bus_type" and have
>     only one type of list and iterator for all devices of all subsystems
>  2.6.27+
>   - allow multiple "drivers" to bind a single device (now that the
>     difference between class and bus devices is gone)

I'm hoping that we might be able to get this last one by 2.6.26 or .27,
depending on how much time I get to work on it...

Other than that, I agree with this timeline.

thanks,

greg k-h
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