From: Jan Kiszka <jan.kiszka@domain.hid>
To: Steven Seeger <steven.seeger@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-core] rtdm timer questions
Date: Thu, 12 Mar 2009 13:09:02 +0100 [thread overview]
Message-ID: <49B8FB5E.1050907@domain.hid> (raw)
In-Reply-To: <8334A175-8F99-499D-9466-5F0B508FF5DD@comcast.net>
Steven Seeger wrote:
> I think I see what my problem is with the driver. The flag that is
> holding off the extra starts is stupidly not set to volatile. Oops. I'll
> report back with results later.
Be careful with volatile variables: Unless they refer to hardware-backed
data (MMIO), you may just happen to write racy lock-less code - or the
volatile is useless anyway.
Jan
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2009-03-12 12:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-12 10:55 [Xenomai-core] rtdm timer questions Steven Seeger
2009-03-12 11:12 ` Gilles Chanteperdrix
2009-03-12 11:29 ` Steven Seeger
2009-03-12 11:46 ` Jan Kiszka
2009-03-12 11:50 ` Steven Seeger
2009-03-12 11:51 ` Steven Seeger
2009-03-12 12:09 ` Jan Kiszka [this message]
2009-03-12 12:15 ` Steven Seeger
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