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Date: Wed, 26 Apr 2006 10:17:19 +0800
From: Akinobu Mita <mita@miraclelinux.com>
To: Greg KH <greg@kroah.com>
Cc: linux-kernel@vger.kernel.org, akpm@osdl.org,
       Patrick Mochel <mochel@osdl.org>
Subject: Re: [patch 1/2] kref: detect kref_put() with unreferenced object
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References: <20060425082137.028875000@localhost.localdomain> <20060425082359.767915000@localhost.localdomain> <20060426002628.GB24343@kroah.com>
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> I really don't see how this is going to make it easier to debug
> anything.  Remember, when a kref goes to 0, it is automatically freed.
> So any code that tries to use it afterward just dies a horrible death,
> if CONFIG_DEBUG_SLAB is enabled.

Thanks, I finally understood it is not needed as you said.
So I can just remove that BUG_ON()es for detecting zero atomic_t counter
while I replace atomic_t counters with kref.