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

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Date:	Tue, 5 Jan 2010 15:20:53 -0800
From:	Greg KH <greg@...ah.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [5/12] SYSFS: Add attribute array to sysdev classes

On Tue, Jan 05, 2010 at 05:24:51PM +0100, Andi Kleen wrote:
> 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?

For now, nah, that's ok, I'll take this as-is.  But if you want to make
this change in the future, feel free to.

thanks,

greg k-h
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