linux-kernel - Re: kfree(0)

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Message-ID: <20070814232107.GA4265@aurum.uhlenkott.net>
Date:	Tue, 14 Aug 2007 16:21:07 -0700
From:	Jason Uhlenkott <jasonuhl@...onuhl.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Tim Bird <tim.bird@...sony.com>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: kfree(0) - ok?

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, but
the constant value 0 when used in pointer context is always a null
pointer (and in fact the standard requires that NULL be #defined as 0
or a cast thereof).
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