linux-kernel - Re: SLUB: Return ZERO_SIZE

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Message-ID: <46644002.8060008@goop.org>
Date:	Mon, 04 Jun 2007 09:38:26 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Lameter <clameter@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: SLUB: Return ZERO_SIZE_PTR for kmalloc(0)

Pekka Enberg wrote:
> Then we might as well return your regular NULL pointer for zero-length
> allocations as you can't do anything sane with ZERO_SIZE_PTR either.

Round and round.  You can't distinguish NULL from allocation failure,
which kmalloc(0) decidedly *isn't*.

    J
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