linux-kernel - Re: [PATCH] [5/12] SYSFS: Add attribute array to sysdev classes

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Message-ID: <20100105162451.GF1778@basil.fritz.box>
Date:	Tue, 5 Jan 2010 17:24:51 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Greg KH <greg@...ah.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [5/12] SYSFS: Add attribute array to sysdev classes

On Tue, Jan 05, 2010 at 06:54:33AM -0800, Greg KH wrote:
> On Tue, Jan 05, 2010 at 12:48:02PM +0100, Andi Kleen wrote:
> > 
> > Add a attribute array that is automatically registered and unregistered
> > to struct sysdev_class. This is similar to what struct class has.
> > 
> > A lot of drivers add list of attributes, so it's better to do 
> > this easily in the common sysdev layer.
> > 
> > This adds a new field to struct sysdev_class. I audited the 
> > whole tree and there are no dynamically allocated sysdev classes,
> > so this is fully compatible. 
> 
> I agree, this should be done, but can you use an attribute group
> instead, like the driver core does?  That way you don't need the new
> function that you created that duplicates that logic :)

Actually the attributes use own loops for this too.

In theory could add a group in the middle, but it would greatly complicate
the driver interface for little gain.

In theory the low loops could be shared between the group code
and sysfs_create_files(), but I'm not sure it's really worth
it because it's just a few lines of code (which are currently
duplicated in multiple places anyways, so it's a net-win)

You still want me to attempt that?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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