linux-kernel - Re: [PATCH] kobject: make sure kobj->ktype is set before kobject

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Message-ID: <20071128214502.GA3255@kroah.com>
Date:	Wed, 28 Nov 2007 13:45:02 -0800
From:	Greg KH <greg@...ah.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Jonathan Corbet <corbet@....net>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>
Subject: Re: [PATCH] kobject: make sure kobj->ktype is set before
	kobject_init

On Wed, Nov 28, 2007 at 03:42:00PM -0500, Alan Stern wrote:
> This patch (as1020) adds a check to kobject_init() to insure that the
> ktype field is not NULL.  This is just for safety's sake; as far as I
> know there are no remaining places where the field is left unset.  But
> ironically, kset_init() did fail to set it!  The patch fixes that and
> removes some redundant initialization in kset_createa().
> 
> The patch also fixes up elevator_init(), where ktype was set after
> calling kobject_init() instead of before.

No, it's safe to set ktype after kobject_init, it was just not safe to
set the kset.  As Kay pointed out, I just added a patch to my tree to
resolve this issue, and I'll go back and update the documentation now.

I do like the "check for a ktype" warning, I'll go add that to my local
tree and see what breaks.  Odds are, all the static kobjects will :(

thanks,

greg k-h
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