From: Philippe Gerum <rpm@xenomai.org>
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: Jan Kiszka <jan.kiszka@domain.hid>,
Xenomai core <Xenomai-core@domain.hid>
Subject: Re: [Xenomai-core] arm: Unprotected access to irq_desc field?
Date: Thu, 28 Oct 2010 21:34:29 +0200 [thread overview]
Message-ID: <1288294469.1816.107.camel@domain.hid> (raw)
In-Reply-To: <4CC9CBE1.6030006@domain.hid>
On Thu, 2010-10-28 at 21:15 +0200, Gilles Chanteperdrix wrote:
> Jan Kiszka wrote:
> > Gilles,
> >
> > I happened to come across rthal_mark_irq_disabled/enabled on arm. On
> > first glance, it looks like these helpers manipulate irq_desc::status
> > non-atomically, i.e. without holding irq_desc::lock. Isn't this fragile?
>
> I have no idea. How do the other architectures do? As far as I know,
> this code has been copied from there.
Other archs do the same, simply because once an irq is managed by the
hal, it may not be shared in any way with the regular kernel. So locking
is pointless.
--
Philippe.
next prev parent reply other threads:[~2010-10-28 19:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-28 15:38 [Xenomai-core] arm: Unprotected access to irq_desc field? Jan Kiszka
2010-10-28 19:15 ` Gilles Chanteperdrix
2010-10-28 19:34 ` Philippe Gerum [this message]
2010-10-29 7:00 ` Jan Kiszka
2010-10-29 8:27 ` Philippe Gerum
2010-10-29 9:05 ` Jan Kiszka
2010-10-29 12:00 ` Philippe Gerum
2010-10-29 12:03 ` Philippe Gerum
2010-10-29 12:09 ` Jan Kiszka
2010-10-29 12:46 ` Philippe Gerum
2010-10-29 12:58 ` Philippe Gerum
2010-10-29 13:54 ` Jan Kiszka
2010-10-28 19:37 ` Gilles Chanteperdrix
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