From: Alessandro Zummo <alessandro.zummo@towertech.it>
To: Jiri Kosina <jkosina@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alessandro Zummo <a.zummo@towertech.it>,
David Brownell <david-b@pacbell.net>,
Nickk Piggin <nickpiggin@yahoo.com.au>,
linux-kernel@vger.kernel.org
Subject: Re: [RESEND] [PATCH] RTC: assure proper memory ordering with respect to RTC_DEV_BUSY flag (was Re: RTC: convert mutex to bitfield)
Date: Sun, 2 Dec 2007 23:13:22 +0100 [thread overview]
Message-ID: <20071202231322.2c104d8c@i1501.lan.towertech.it> (raw)
In-Reply-To: <Pine.LNX.4.64.0712022258120.13260@jikos.suse.cz>
On Sun, 2 Dec 2007 23:00:04 +0100 (CET)
Jiri Kosina <jkosina@suse.cz> wrote:
> [ nobody seems to have picked this up, resending. This is a fix for
> commit 8853c202b4 in Linus' tree ]
>
> From: Jiri Kosina <jkosina@suse.cz>
>
> RTC: assure proper memory ordering with respect to RTC_DEV_BUSY flag
>
> We must make sure that the RTC_DEV_BUSY flag has proper lock semantics,
> i.e. that the RTC_DEV_BUSY stores clearing the flag don't get reordered
> before the preceeding stores and loads and vice versa.
>
> Spotted by Nick Piggin.
>
> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
missed it, sorry.
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
--
Best regards,
Alessandro Zummo,
Tower Technologies - Torino, Italy
http://www.towertech.it
prev parent reply other threads:[~2007-12-02 22:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200711301355.03139.nickpiggin@yahoo.com.au>
[not found] ` <Pine.LNX.4.64.0711300944020.12807@jikos.suse.cz>
2007-12-02 22:00 ` Jiri Kosina
2007-12-02 22:13 ` Alessandro Zummo [this message]
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