linux-kernel - Re: SLUB: Return ZERO_SIZE

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Message-ID: <466575EE.70901@goop.org>
Date:	Tue, 05 Jun 2007 07:40:46 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Rene Herman <rene.herman@...il.com>
CC:	"John Anthony Kazos Jr." <jakj@...-k-j.com>,
	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)

Rene Herman wrote:
> No, what we have is a sizeof(pointer) sized pointer pointing to an
> object of size zero. ZERO_SIZE_PTR is butt-ugly. With a really ugly butt. 

It doesn't matter.  It will never, ever, be used by anything except the
kmalloc internals.  No client code should ever use the constant for
anything.

    J
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