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From: Tilman Schmidt <tilman@imap.cc>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Karsten Keil <kkeil@suse.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	i4ldeveloper@listserv.isdn4linux.de,
	linux-serial@vger.kernel.org, Hansjoerg Lipp <hjlipp@web.de>,
	Alan Cox <alan@lxorguk.ukuu.org.uk>, Greg KH <greg@kroah.com>
Subject: Re: [PATCH] drivers/isdn/gigaset: new M101 driver
Date: Mon, 05 Feb 2007 13:29:20 +0100	[thread overview]
Message-ID: <45C72320.5040103@imap.cc> (raw)
In-Reply-To: <20070204205817.fe686375.akpm@linux-foundation.org>

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Andrew Morton schrieb:
> On Mon, 05 Feb 2007 02:42:09 +0100 Tilman Schmidt <tilman@imap.cc> wrote:
> 
>> It's a pointer. Are reads and writes of pointer sized objects
>> guaranteed to be atomic on every platform?
> 
> Yup - we make the same assumption about longs in various places.
> 
> It's a bit strange to read a pointer which can be changing at the
> same time.  Because the local copy will no longer represent the
> thing which it was just copied from.

It's not that bad. The only possible concurrent change is from NULL
to non-NULL. Fearing an inconsistent read in that event was too
paranoid apparently.

Thanks for all your suggestions. I'll prepare a new patch based on
them.

-- 
Tilman Schmidt                    E-Mail: tilman@imap.cc
Bonn, Germany
Diese Nachricht besteht zu 100% aus wiederverwerteten Bits.
Ungeöffnet mindestens haltbar bis: (siehe Rückseite)


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      reply	other threads:[~2007-02-05 12:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-01 21:12 [PATCH] drivers/isdn/gigaset: new M101 driver Tilman Schmidt
2007-02-02  1:13 ` Andrew Morton
2007-02-03 16:09   ` Greg KH
2007-02-04  0:26     ` Tilman Schmidt
2007-02-12 18:47       ` Greg KH
2007-02-12 23:49         ` Tilman Schmidt
2007-02-04  1:32   ` Tilman Schmidt
2007-02-04  1:56     ` Andrew Morton
2007-02-05  1:42       ` Tilman Schmidt
2007-02-05  4:58         ` Andrew Morton
2007-02-05 12:29           ` Tilman Schmidt [this message]

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