From: Andrea Arcangeli <andrea@suse.de>
To: Takashi Iwai <tiwai@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
Arjan van de Ven <arjanv@redhat.com>
Subject: Re: [announce] [patch] Voluntary Kernel Preemption Patch
Date: Mon, 12 Jul 2004 21:36:06 +0200 [thread overview]
Message-ID: <20040712193606.GP20947@dualathlon.random> (raw)
In-Reply-To: <s5hpt71cyxq.wl@alsa2.suse.de>
On Mon, Jul 12, 2004 at 12:17:05PM +0200, Takashi Iwai wrote:
> Couldn't it be simply written like below?
>
> #define BUILD_BUG_ON(condition) do { if (unlikely(condition)) BUILD_BUG(); } while(0)
BUILD_BUG_ON is a different thing. the "condition" is meant to be
evaluated at _compile_ time, not at runtime (so the unlikely is useless
since the compiler knows the result before it generates the bytecode).
This is why BUILD_BUG() isn't implemented anywhere, so you get a linker
error during the compilation.
For example with it you can do things like:
BUILD_BUG_ON(offsetof(struct task_struct, thread.i387.fxsave) & 15);
(see asm-i386/bugs.h, it's doing the BUILD_BUG_ON by hand right now)
next prev parent reply other threads:[~2004-07-12 19:36 UTC|newest]
Thread overview: 270+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-09 18:26 [announce] [patch] Voluntary Kernel Preemption Patch Ingo Molnar
2004-07-09 19:51 ` Christoph Hellwig
2004-07-09 23:50 ` Andrea Arcangeli
2004-07-10 0:52 ` Andrea Arcangeli
2004-07-10 1:02 ` Dave Jones
2004-07-12 10:17 ` Takashi Iwai
2004-07-12 19:36 ` Andrea Arcangeli [this message]
2004-07-13 7:43 ` Takashi Iwai
2004-07-10 6:32 ` Arjan van de Ven
2004-07-10 7:57 ` Ingo Molnar
2004-07-10 8:10 ` ismail dönmez
2004-07-10 8:28 ` Ingo Molnar
2004-07-19 10:36 ` [patch] voluntary-preempt 2.6.8-rc2-H4 Ingo Molnar
2004-07-20 1:38 ` Ramón Rey Vicente
2004-07-20 6:02 ` Ingo Molnar
2004-07-10 15:36 ` [announce] [patch] Voluntary Kernel Preemption Patch Andrea Arcangeli
2004-07-10 12:48 ` Ingo Molnar
2004-07-10 15:12 ` Con Kolivas
2004-07-10 15:14 ` Arjan van de Ven
2004-07-10 15:18 ` Con Kolivas
2004-07-11 7:07 ` Zwane Mwaikambo
2004-07-11 7:09 ` Con Kolivas
2004-07-11 7:16 ` [announce] [patch] " Zwane Mwaikambo
2004-07-11 9:18 ` Ingo Molnar
2004-07-11 9:29 ` Con Kolivas
2004-07-10 16:18 ` [announce] [patch] " Con Kolivas
2004-07-11 6:47 ` [ck] " Ingo Molnar
2004-07-11 6:59 ` Con Kolivas
2004-07-11 11:18 ` R. J. Wysocki
2004-07-11 7:09 ` [ck] Re: [announce] [patch] " Zwane Mwaikambo
2004-07-11 14:27 ` Con Kolivas
2004-07-11 14:29 ` Con Kolivas
2004-07-11 14:38 ` Ingo Molnar
2004-07-11 17:29 ` André Goddard Rosa
2004-07-11 17:49 ` Grzegorz Kulewski
2004-07-11 21:20 ` Con Kolivas
2004-07-11 21:25 ` Grzegorz Kulewski
2004-07-11 20:17 ` Ingo Molnar
2004-07-12 8:23 ` Voluntary Preemption + concurent games Aivils
2004-07-12 9:51 ` Con Kolivas
2004-07-12 10:45 ` Lenar Lõhmus
2004-07-12 11:52 ` Aivils
2004-07-12 13:35 ` Nick Piggin
2004-07-12 14:15 ` [ck] Re: [announce] [patch] Voluntary Kernel Preemption Patch Chris Friesen
2004-07-12 14:19 ` Ingo Molnar
2004-07-10 15:58 ` Andrea Arcangeli
2004-07-09 21:13 ` Redeeman
2004-07-10 8:02 ` Ingo Molnar
2004-07-10 8:50 ` Ingo Molnar
2004-07-10 10:55 ` ismail dönmez
2004-07-10 11:26 ` Arjan van de Ven
2004-07-10 12:01 ` ismail dönmez
2004-07-10 12:05 ` Arjan van de Ven
2004-07-10 12:09 ` Nick Piggin
2004-07-10 12:35 ` Ingo Molnar
2004-07-10 12:58 ` ismail dönmez
2004-07-10 13:55 ` Ingo Molnar
2004-07-10 14:45 ` Nick Piggin
2004-07-10 14:57 ` ismail dönmez
2004-07-12 10:48 ` Takashi Iwai
2004-07-12 13:09 ` ismail dönmez
2004-07-12 13:14 ` Takashi Iwai
2004-07-09 21:36 ` Torrey Hoffman
2004-07-10 8:23 ` Ingo Molnar
2004-07-10 1:00 ` Con Kolivas
2004-07-10 1:04 ` Dave Jones
2004-07-10 12:55 ` Ingo Molnar
2004-07-11 5:25 ` Andrew Morton
2004-07-11 9:32 ` Ingo Molnar
2004-07-11 9:45 ` Andrew Morton
2004-07-11 9:50 ` Ingo Molnar
2004-07-11 9:58 ` Andrew Morton
2004-07-11 10:30 ` Ingo Molnar
2004-07-11 10:42 ` Andrew Morton
2004-07-11 10:59 ` Arjan van de Ven
2004-07-11 11:13 ` Andrew Morton
2004-07-11 18:07 ` Mikulas Patocka
2004-07-12 7:08 ` Zwane Mwaikambo
2004-07-19 10:20 ` Ingo Molnar
2004-07-11 23:12 ` Robert Love
2004-07-12 22:40 ` Bill Davidsen
2004-07-12 13:24 ` John Stoffel
2004-07-12 22:56 ` [linux-audio-dev] " Lee Revell
2004-07-12 23:31 ` Andrew Morton
2004-07-12 23:58 ` Paul Davis
2004-07-13 0:06 ` Andrew Morton
2004-07-13 0:21 ` Con Kolivas
2004-07-13 1:01 ` [linux-audio-dev] Re: [announce] [patch] " Lee Revell
2004-07-13 7:49 ` Takashi Iwai
2004-07-13 8:12 ` Lee Revell
2004-07-13 0:01 ` Paul Davis
2004-07-13 0:08 ` Andrew Morton
2004-07-13 16:25 ` Andrea Arcangeli
2004-07-13 18:42 ` Lee Revell
2004-07-13 21:29 ` Andrew Morton
2004-07-13 21:45 ` Lee Revell
2004-07-14 8:51 ` Takashi Iwai
2004-07-14 9:36 ` Lee Revell
2004-07-14 10:48 ` Takashi Iwai
2004-07-14 14:52 ` Lee Revell
2004-07-14 16:29 ` Lee Revell
2004-07-14 10:26 ` Benno Senoner
2004-07-13 18:48 ` Andrew Morton
2004-07-13 21:38 ` Andrea Arcangeli
2004-07-13 21:54 ` Andrew Morton
2004-07-13 22:01 ` Andrea Arcangeli
2004-07-13 22:25 ` Andrew Morton
2004-07-13 22:37 ` Andrea Arcangeli
2004-07-13 22:44 ` Andrew Morton
2004-07-13 22:53 ` Andrea Arcangeli
2004-07-13 23:06 ` Andrew Morton
2004-07-13 23:18 ` Andrea Arcangeli
2004-07-13 23:32 ` Andrew Morton
2004-07-14 0:40 ` Andrea Arcangeli
2004-07-14 0:45 ` Andrew Morton
2004-07-19 11:59 ` Ingo Molnar
2004-09-02 22:03 ` Andrea Arcangeli
2004-09-02 22:20 ` Andrew Morton
2004-09-02 23:03 ` Ingo Molnar
2004-09-02 23:21 ` Ingo Molnar
2004-07-13 7:58 ` Takashi Iwai
2004-07-13 0:17 ` Lee Revell
2004-07-13 0:46 ` Andrew Morton
2004-07-13 2:52 ` Lee Revell
2004-07-13 3:59 ` Andrew Morton
2004-07-13 7:57 ` Lee Revell
2004-07-19 10:48 ` Ingo Molnar
2004-07-19 11:34 ` Ingo Molnar
2004-07-20 5:38 ` Lee Revell
2004-07-20 6:12 ` Ingo Molnar
2004-07-20 6:59 ` Lee Revell
2004-07-20 7:11 ` Ingo Molnar
[not found] ` <200407202011.20558.musical_snake@gmx.de>
2004-07-20 19:56 ` Lee Revell
2004-07-20 23:49 ` Benno Senoner
2004-07-21 0:32 ` [linux-audio-dev] " Lee Revell
2004-07-21 1:25 ` Timothy Miller
2004-07-21 21:38 ` Another dumb question about " Timothy Miller
2004-07-24 0:25 ` Lee Revell
2004-07-25 20:19 ` Timothy Miller
2004-07-25 20:13 ` Lee Revell
2004-07-21 10:53 ` [linux-audio-dev] Re: [announce] [patch] " Florian Schmidt
2004-07-21 11:18 ` Thomas Charbonnel
2004-07-21 12:04 ` pci gfx card / jack xruns / pci latencies (was: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch) Florian Schmidt
2004-07-21 17:49 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Fernando Pablo Lopez-Lezcano
2004-07-22 22:25 ` Andrew McGregor
2004-07-22 23:16 ` Florian Schmidt
2004-07-21 14:27 ` Benno Senoner
2004-07-20 12:19 ` Jens Axboe
2004-07-20 21:32 ` Lee Revell
2004-07-24 4:07 ` Lee Revell
2004-07-24 5:46 ` Lee Revell
2004-07-24 6:33 ` Lee Revell
2004-07-24 6:43 ` Ingo Molnar
2004-07-24 22:49 ` Lee Revell
2004-07-24 23:30 ` Lee Revell
2004-07-24 11:27 ` max request size 1024KiB by default? Rudo Thomas
2004-07-24 22:58 ` Lee Revell
2004-07-26 19:29 ` Johannes Stezenbach
2004-07-27 5:15 ` Jens Axboe
2004-07-24 12:41 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Mark Lord
2004-07-24 4:58 ` Lee Revell
2004-07-13 8:31 ` Lee Revell
2004-07-13 8:43 ` Andrew Morton
2004-07-13 8:53 ` Lee Revell
2004-07-13 9:00 ` Andrew Morton
2004-07-13 9:21 ` Takashi Iwai
2004-07-13 9:25 ` Andrew Morton
2004-07-13 9:33 ` Takashi Iwai
2004-07-13 9:44 ` Andrew Morton
2004-07-13 9:23 ` Lee Revell
2004-07-13 9:29 ` Andrew Morton
2004-07-13 20:37 ` Lee Revell
2004-07-13 22:32 ` Lee Revell
2004-07-13 8:07 ` Takashi Iwai
2004-07-13 22:40 ` Bill Davidsen
2004-07-13 23:47 ` Randy.Dunlap
2004-07-19 10:29 ` Ingo Molnar
2004-07-21 3:27 ` Lee Revell
2004-07-21 7:03 ` Andrew Morton
2004-07-21 4:58 ` Lee Revell
2004-07-21 5:30 ` Ingo Molnar
2004-07-21 6:03 ` Lee Revell
2004-07-21 8:22 ` Ingo Molnar
2004-07-21 8:52 ` Ingo Molnar
2004-07-21 11:32 ` Nick Piggin
2004-07-21 15:44 ` Ingo Molnar
2004-07-22 4:56 ` Nick Piggin
2004-07-22 7:07 ` Ingo Molnar
2004-07-22 10:54 ` Nick Piggin
2004-07-22 16:23 ` Ingo Molnar
2004-07-22 22:11 ` Nick Piggin
2004-07-23 5:47 ` Ingo Molnar
2004-07-23 6:45 ` Nick Piggin
2004-07-23 6:55 ` Ingo Molnar
2004-07-23 7:11 ` Nick Piggin
2004-07-23 7:21 ` Ingo Molnar
2004-07-23 7:28 ` Nick Piggin
2004-07-21 18:34 ` Scott Wood
2004-07-21 18:46 ` Ingo Molnar
2004-07-21 19:56 ` Scott Wood
2004-07-21 21:08 ` Ingo Molnar
2004-07-22 2:47 ` Scott Wood
2004-07-21 21:45 ` Ingo Molnar
2004-07-22 2:28 ` Scott Wood
2004-07-22 7:40 ` Ingo Molnar
2004-07-22 18:53 ` Scott Wood
2004-07-22 19:45 ` Bill Huey
2004-07-28 6:45 ` Ingo Molnar
2004-07-28 20:52 ` Scott Wood
2004-07-29 18:21 ` Ingo Molnar
2004-07-29 18:36 ` Bill Huey
2004-07-29 19:17 ` Scott Wood
2004-07-29 19:25 ` Bill Huey
2004-07-30 2:23 ` Eric St-Laurent
2004-07-29 20:26 ` Pavel Machek
2004-07-29 20:57 ` Scott Wood
2004-07-29 21:00 ` Pavel Machek
2004-07-29 21:07 ` Ingo Molnar
2004-07-21 22:52 ` Nick Piggin
2004-07-21 18:32 ` Scott Wood
2004-07-21 20:40 ` Ingo Molnar
2004-07-21 18:30 ` Scott Wood
2004-07-21 18:43 ` Ingo Molnar
2004-07-22 2:32 ` Scott Wood
2004-07-22 9:51 ` Ingo Molnar
2004-07-22 18:36 ` Scott Wood
2004-07-22 19:11 ` Robert Love
2004-07-21 21:00 ` Scott Wood
2004-07-21 21:18 ` Ingo Molnar
2004-07-21 22:14 ` Bill Huey
2004-07-21 22:31 ` Bill Huey
2004-07-21 22:37 ` Scott Wood
2004-07-22 10:06 ` [patch] voluntary-preempt-2.6.8-rc2-H9 Ingo Molnar
2004-07-22 16:00 ` scheduling while atomic (Re: voluntary-preempt-2.6.8-rc2-H9) Rudo Thomas
2004-07-22 16:19 ` Ingo Molnar
2004-07-22 17:24 ` voluntary-preempt I0: sluggish feel Rudo Thomas
2004-07-22 17:52 ` Matt Heler
2004-07-22 17:54 ` Rudo Thomas
2004-07-22 18:01 ` Ingo Molnar
2004-07-22 18:08 ` Ingo Molnar
2004-07-22 18:14 ` Ingo Molnar
2004-07-22 18:37 ` Rudo Thomas
2004-07-23 10:42 ` [patch] voluntary-preempt-2.6.8-rc2-I3 Ingo Molnar
2004-07-23 10:58 ` Paolo Ciarrocchi
2004-07-23 11:04 ` Ingo Molnar
2004-07-23 11:28 ` [patch] voluntary-preempt-2.6.8-rc2-I4 Ingo Molnar
2004-07-24 0:16 ` Lee Revell
2004-07-23 11:42 ` [patch] voluntary-preempt-2.6.8-rc2-I3 Paolo Ciarrocchi
2004-07-23 12:00 ` Ingo Molnar
2004-07-23 15:36 ` Dang, Linh [CAR:2X23:EXCH]
2004-07-23 23:48 ` Thomas Charbonnel
2004-07-26 11:10 ` Ingo Molnar
2004-07-26 12:27 ` Thomas Charbonnel
2004-07-22 18:31 ` voluntary-preempt I0: sluggish feel Robert Love
2004-07-22 18:32 ` Rudo Thomas
2004-07-22 18:38 ` Ingo Molnar
2004-07-22 18:00 ` Ingo Molnar
2004-07-21 6:07 ` [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch Lee Revell
2004-07-21 10:14 ` Roger Luethi
2004-07-13 0:58 ` Jan Depner
2004-07-13 1:00 ` Andrew Morton
2004-07-13 3:31 ` Florin Andrei
2004-07-13 6:31 ` Paul Winkler
2004-07-13 13:26 ` Benno Senoner
2004-07-13 14:50 ` Paul Davis
2004-07-13 19:45 ` Lee Revell
2004-07-13 22:17 ` Bill Davidsen
2004-07-16 4:50 ` Florin Andrei
2004-07-16 12:49 ` Takashi Iwai
2004-07-13 21:53 ` Timothy Miller
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