linux-kernel - Re: [RFC v5][PATCH 2/8] General infrastructure for checkpoint restart

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Message-ID: <20080916122703.GA24431@wavehammer.waldi.eu.org>
Date:	Tue, 16 Sep 2008 14:27:03 +0200
From:	Bastian Blank <bastian@...di.eu.org>
To:	Dave Hansen <dave@...ux.vnet.ibm.com>
Cc:	Oren Laadan <orenl@...columbia.edu>,
	containers@...ts.linux-foundation.org, jeremy@...p.org,
	linux-kernel@...r.kernel.org, arnd@...db.de
Subject: Re: [RFC v5][PATCH 2/8] General infrastructure for checkpoint
	restart

On Mon, Sep 15, 2008 at 11:02:30AM -0700, Dave Hansen wrote:
> All of the casting here is unnecessary.  'void *' behaves like 'char *'
> when you do arithmetic on it.  

No. Arithmetic on void pointer is not allowed by the standard. This is a
gcc extension. It's okay to be used in the Linux kernel but not in
general.

The second cast (from char * to void *) however is useless.

Bastian

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