linux-kernel - Re: kfree(0)

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Message-ID: <20070815085217.GA14156@aurum.uhlenkott.net>
Date:	Wed, 15 Aug 2007 01:52:17 -0700
From:	Jason Uhlenkott <jason@...enkott.net>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Tim Bird <tim.bird@...sony.com>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: kfree(0) - ok?

On Wed, Aug 15, 2007 at 09:28:54 +0200, Jan Engelhardt wrote:
> 
> On Aug 14 2007 16:21, Jason Uhlenkott wrote:
> >On Tue, Aug 14, 2007 at 15:55:48 -0700, Arjan van de Ven wrote:
> >> NULL is not 0 though.
> >
> >It is.  Its representation isn't guaranteed to be all-bits-zero,
> 
> C guarantees that.

Equality with the expression 0 is guaranteed.  Representation isn't.

http://www.c-faq.com/null/varieties.html
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