From: Mark Lord <lkml@rtr.ca>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "linux-os (Dick Johnson)" <linux-os@analogic.com>,
Ingo Molnar <mingo@elte.hu>, Linus Torvalds <torvalds@osdl.org>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] spinlocks: remove 'volatile'
Date: Thu, 06 Jul 2006 14:15:51 -0400 [thread overview]
Message-ID: <44AD5357.4000100@rtr.ca> (raw)
In-Reply-To: <1152187268.3084.29.camel@laptopd505.fenrus.org>
Arjan van de Ven wrote:
>
> this is not really what the C standard says.
..and now half of LKML scurries to find a copy of the ANSI C specs..
I'm still browsing a copy here, but so far have only really found this:
A volatile declaration may be used to describe an object corresponding
to a memory-mapped input/output port or an object accessed by an
aysnchronously interrupting function. Actions on objects so declared
shall not be "optimized out" by an implementation or reordered except
as permitted by the rules for evaluating expressions.
Still lots of document left to go through, so I suppose it might
contradict itself later on.
And of course this is only a language spec, not Real Life (tm).
Cheers
next prev parent reply other threads:[~2006-07-06 18:15 UTC|newest]
Thread overview: 163+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-05 8:49 [patch] uninline init_waitqueue_*() functions Ingo Molnar
2006-07-05 9:31 ` Andrew Morton
2006-07-05 9:32 ` Ingo Molnar
2006-07-05 9:53 ` Andrew Morton
2006-07-05 10:26 ` Ingo Molnar
2006-07-05 11:30 ` Ingo Molnar
2006-07-05 11:46 ` Ingo Molnar
2006-07-05 17:10 ` Andrew Morton
2006-07-05 19:35 ` Ingo Molnar
2006-07-05 20:18 ` Andrew Morton
2006-07-05 20:36 ` Linus Torvalds
2006-07-05 20:47 ` Ingo Molnar
2006-07-05 21:15 ` Ingo Molnar
2006-07-05 21:21 ` Linus Torvalds
2006-07-05 21:45 ` Ingo Molnar
2006-07-05 21:58 ` Randy.Dunlap
2006-07-05 22:00 ` Ingo Molnar
2006-07-05 22:10 ` Randy.Dunlap
2006-07-05 22:27 ` Ingo Molnar
2006-07-05 23:15 ` Adrian Bunk
2006-07-05 22:09 ` Linus Torvalds
2006-07-05 22:30 ` Ingo Molnar
2006-07-05 23:11 ` Linus Torvalds
2006-07-06 8:16 ` [patch] spinlocks: remove 'volatile' Ingo Molnar
2006-07-06 8:23 ` Ingo Molnar
2006-07-06 9:27 ` Heiko Carstens
2006-07-06 9:34 ` Arjan van de Ven
2006-07-06 11:59 ` linux-os (Dick Johnson)
2006-07-06 12:01 ` Arjan van de Ven
2006-07-06 12:29 ` linux-os (Dick Johnson)
2006-07-06 12:39 ` Arjan van de Ven
2006-07-06 13:39 ` J.A. Magallón
2006-07-06 13:43 ` Arjan van de Ven
2006-07-06 14:05 ` Chase Venters
2006-07-06 14:26 ` Andreas Schwab
2006-07-06 16:40 ` Nick Piggin
2006-07-06 23:19 ` David Schwartz
2006-07-06 18:15 ` Mark Lord [this message]
2006-07-06 19:15 ` Linus Torvalds
2006-07-06 19:33 ` Chris Friesen
2006-07-06 19:37 ` Mark Lord
2006-07-06 20:28 ` Chris Friesen
2006-07-06 20:32 ` Linus Torvalds
2006-07-06 19:38 ` Arjan van de Ven
2006-07-06 19:41 ` Måns Rullgård
2006-07-06 19:42 ` Jeff Garzik
2006-07-06 19:58 ` Linus Torvalds
2006-07-06 20:27 ` Mark Lord
2006-07-06 20:40 ` Chris Friesen
2006-07-06 21:00 ` Linus Torvalds
2006-07-08 8:40 ` Avi Kivity
2006-07-08 8:51 ` Arjan van de Ven
2006-07-08 9:20 ` Avi Kivity
2006-07-08 9:51 ` Arjan van de Ven
2006-07-08 10:18 ` Avi Kivity
2006-07-08 10:28 ` Thomas Gleixner
2006-07-09 4:19 ` Benjamin Herrenschmidt
2006-07-09 12:47 ` Avi Kivity
2006-07-09 19:16 ` David Schwartz
2006-07-09 19:51 ` Theodore Tso
2006-07-09 20:40 ` [OT] 'volatile' in userspace Rutger Nijlunsing
2006-07-10 3:42 ` Theodore Tso
2006-07-10 17:00 ` Joshua Hudson
2006-07-10 17:54 ` Nick Piggin
2006-07-11 7:48 ` Jan Engelhardt
2006-07-11 11:53 ` Nick Piggin
2006-07-11 19:09 ` Björn Steinbrink
2006-07-11 20:55 ` Jeff Dike
2006-07-10 18:54 ` Jeff Dike
2006-07-10 20:09 ` Philippe Troin
2006-07-10 20:52 ` Jeff Dike
2006-07-06 16:07 ` [patch] spinlocks: remove 'volatile' Linus Torvalds
2006-07-06 16:13 ` Linus Torvalds
2006-07-06 17:04 ` Jeff Garzik
2006-07-06 17:52 ` linux-os (Dick Johnson)
2006-07-06 18:00 ` Linus Torvalds
2006-07-06 21:02 ` J.A. Magallón
2006-07-06 21:12 ` Linus Torvalds
2006-07-06 18:10 ` Michael Buesch
2006-07-06 18:16 ` Chase Venters
2006-07-07 18:16 ` Krzysztof Halasa
2006-07-07 19:51 ` linux-os (Dick Johnson)
2006-07-07 20:25 ` Linus Torvalds
2006-07-07 21:22 ` linux-os (Dick Johnson)
2006-07-07 21:48 ` Chase Venters
2006-07-08 10:00 ` Krzysztof Halasa
2006-07-08 13:41 ` Chase Venters
2006-07-08 20:09 ` Krzysztof Halasa
2006-07-08 20:40 ` Chase Venters
2006-07-08 20:47 ` Chase Venters
2006-07-09 10:57 ` Krzysztof Halasa
2006-07-07 21:59 ` Linus Torvalds
2006-07-07 22:06 ` Linus Torvalds
2006-07-08 20:49 ` Pavel Machek
2006-07-08 21:43 ` Linus Torvalds
2006-07-07 22:05 ` J.A. Magallón
2006-07-07 22:22 ` Chase Venters
2006-07-07 22:37 ` J.A. Magallón
2006-07-08 9:33 ` David Schwartz
2006-07-07 22:49 ` J.A. Magallón
2006-07-07 22:59 ` Vadim Lobanov
2006-07-07 23:18 ` Chase Venters
2006-07-07 23:36 ` Davide Libenzi
2006-07-07 22:09 ` Ingo Molnar
2006-07-08 7:36 ` Ingo Molnar
2006-07-07 20:39 ` Krzysztof Halasa
2006-07-07 23:06 ` Björn Steinbrink
2006-07-08 8:36 ` Avi Kivity
2006-07-06 19:32 ` Jan Engelhardt
2006-07-06 20:26 ` Jeremy Fitzhardinge
2006-07-06 20:55 ` Jan Engelhardt
2006-07-06 21:07 ` Linus Torvalds
2006-07-06 19:56 ` Linus Torvalds
2006-07-06 20:34 ` Linus Torvalds
2006-07-08 22:50 ` Ralf Baechle
2006-07-09 3:09 ` Linus Torvalds
2006-07-09 3:07 ` Keith Owens
2006-07-09 3:29 ` Linus Torvalds
2006-07-09 3:43 ` Keith Owens
2006-07-09 3:58 ` Linus Torvalds
2006-07-09 6:13 ` David Miller
2006-07-09 14:28 ` Roman Zippel
2006-07-09 15:27 ` Linus Torvalds
2006-07-06 8:18 ` [patch] lockdep: clean up completion initializer in smpboot.c Ingo Molnar
2006-07-06 8:23 ` [patch] uninline init_waitqueue_*() functions Ingo Molnar
2006-07-06 9:02 ` Andrew Morton
2006-07-06 9:12 ` [patch] uninline init_waitqueue_head() Ingo Molnar
2006-07-05 20:45 ` [patch] uninline init_waitqueue_*() functions Ingo Molnar
2006-07-05 10:37 ` Christoph Hellwig
2006-07-05 10:44 ` Andrew Morton
2006-07-05 10:46 ` Andrew Morton
2006-07-05 10:47 ` Ingo Molnar
2006-07-05 9:54 ` [patch] uninline init_waitqueue_*() functions, fix Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2006-07-07 10:21 [patch] spinlocks: remove 'volatile' Chuck Ebbert
2006-07-07 17:09 ` Linus Torvalds
2006-07-08 3:54 Albert Cahalan
2006-07-08 5:25 ` Linus Torvalds
2006-07-08 6:39 ` Nick Piggin
2006-07-08 18:53 ` Linus Torvalds
2006-07-08 9:45 ` Joe Korty
2006-07-08 9:52 ` Arjan van de Ven
2006-07-08 9:59 ` David Schwartz
2006-07-08 10:24 ` Thomas Gleixner
2006-07-08 15:49 ` Albert Cahalan
2006-07-08 18:31 ` Thomas Gleixner
2006-07-08 19:33 ` Albert Cahalan
2006-07-08 20:11 ` Linus Torvalds
2006-07-09 21:10 ` Pavel Machek
2006-07-09 22:18 ` Linus Torvalds
2006-07-10 16:25 ` marty fouts
2006-07-08 23:10 ` David Schwartz
2006-07-08 13:57 ` Andi Kleen
2006-07-08 19:13 ` Linus Torvalds
2006-07-08 10:45 ` Krzysztof Halasa
2006-07-08 6:12 trajce nedev
2006-07-08 6:19 ` Chase Venters
2006-07-08 6:45 ` trajce nedev
2006-07-08 6:58 ` Arjan van de Ven
2006-07-08 7:02 ` Vadim Lobanov
2006-07-08 13:46 ` Chase Venters
2006-07-09 4:39 ` Benjamin Herrenschmidt
2006-07-14 3:30 ` Steven Rostedt
2006-07-08 18:23 ` Linus Torvalds
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