linux-kernel - Re: [patch 12/21] perfmon2 minimal: sysfs interface

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Message-ID: <20080613035055.GD17872@kroah.com>
Date:	Thu, 12 Jun 2008 20:50:55 -0700
From:	Greg KH <greg@...ah.com>
To:	eranian@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch 12/21] perfmon2 minimal: sysfs interface

On Thu, Jun 12, 2008 at 02:54:15PM +0200, stephane eranian wrote:
> Greg,
> 
> I looked at the documentation and the examples.
> 
> Find attached an updated version of the perfmon-sysfs.diff patch.
> 
> I have grouped attribute functions into common show/store functions
> with a strcmp on
> the attribute name. I have also used the kobject_init_and_add() function.
> 
> Once thing still confusing to me is the business with kobject_put()
> after a kobject_init_and_add().
> Is that necessary to drop the ref count to zero?

Yes.

> Also when you link to a parent,  like this:
> 	pfm_kernel_kobj = kobject_create_and_add("perfmon", kernel_kobj);
> 
> Does this increment the ref count on the parent?

Yes.

thanks,

greg k-h
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