From: Arjan van de Ven <arjan@linux.intel.com>
To: Andreas Mohr <andi@lisas.de>
Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: 2.6.32-rc3: floating-point build failure (undefined reference to `__udivdi3' in menu governor)
Date: Wed, 07 Oct 2009 10:45:10 -0700 [thread overview]
Message-ID: <4ACCD3A6.9000306@linux.intel.com> (raw)
In-Reply-To: <20091007173457.GA25415@rhlx01.hs-esslingen.de>
Andreas Mohr wrote:
> Hi,
>> looking at it, can you try sticking (u32) at the end of line 212; that multiply is not very likely to exceed 32 bits
>
> Nopeee.
>
> data->predicted_us = DIV_ROUND_CLOSEST((u32)
> data->expected_us * data->correction_factor[data->bucket],
> (u32)RESOLUTION * DECAY);
>
> It did properly rebuild drivers/cpuidle/governors/menu.o.
> Still happening.
> IOW it must be somewhere inside the DIV_ROUND_CLOSEST macro or so.
it looks like your GCC has a problem dividing by a power of two though;
both DECAY and RESOLUTION are powers of two...
next prev parent reply other threads:[~2009-10-07 17:45 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-05 0:44 Linux 2.6.32-rc3 Linus Torvalds
2009-10-05 18:55 ` James Cloos
2009-10-06 1:57 ` Len Brown
2009-10-06 2:51 ` Dirk Hohndel
2009-10-06 14:18 ` Linus Torvalds
2009-10-06 14:38 ` Dirk Hohndel
2009-10-06 15:13 ` Linus Torvalds
2009-10-06 15:34 ` Dirk Hohndel
2009-10-06 15:43 ` Linus Torvalds
[not found] ` <4ACBB7D7.10207@urpla.net>
2009-10-06 22:13 ` Linus Torvalds
2009-10-06 16:36 ` Frans Pop
2009-10-07 1:09 ` Bryan Donlan
2009-10-07 5:56 ` Frans Pop
2009-10-06 14:44 ` Ingo Molnar
2009-10-06 15:24 ` Linus Torvalds
2009-10-06 15:36 ` Ingo Molnar
2009-10-06 15:51 ` Linus Torvalds
2009-10-06 16:29 ` Ingo Molnar
2009-10-06 16:35 ` Ingo Molnar
2009-10-06 16:31 ` Linus Torvalds
2009-10-06 16:40 ` Ingo Molnar
2009-10-06 18:12 ` Theodore Tso
2009-10-06 18:24 ` Ingo Molnar
2009-10-06 21:19 ` Stefan Richter
2009-10-06 17:15 ` Stefan Richter
2009-10-06 18:16 ` Ingo Molnar
2009-10-06 17:22 ` Frans Pop
2009-10-06 17:32 ` Linus Torvalds
2009-10-06 18:29 ` Frans Pop
2009-10-07 0:51 ` Florian Mickler
2009-10-06 17:35 ` [patch] kbuild: Improve version string logic Ingo Molnar
2009-10-06 18:37 ` Johannes Berg
2009-10-06 18:49 ` Ingo Molnar
2009-10-06 18:55 ` Johannes Berg
2009-10-06 19:03 ` Theodore Tso
2009-10-06 19:45 ` Frans Pop
2009-10-06 19:48 ` Johannes Berg
2009-10-06 20:25 ` Frans Pop
2009-10-07 2:43 ` David Rientjes
2009-10-12 19:57 ` [PATCH, v2] " Ingo Molnar
2009-10-12 22:04 ` Frans Pop
2009-10-13 7:05 ` Ingo Molnar
2009-10-13 17:51 ` Frans Pop
2009-10-13 18:01 ` Linus Torvalds
2009-10-13 23:59 ` David Rientjes
2009-10-14 6:59 ` Ingo Molnar
2009-10-14 7:24 ` David Rientjes
2009-10-14 7:33 ` Ingo Molnar
2009-10-14 7:42 ` David Rientjes
2009-10-14 23:43 ` Frans Pop
2009-10-15 7:37 ` David Rientjes
2009-10-15 14:13 ` Frans Pop
2009-10-15 20:38 ` David Rientjes
2009-10-15 21:01 ` Frans Pop
2009-10-15 9:03 ` Ingo Molnar
2009-10-15 14:42 ` Frans Pop
2009-10-15 20:45 ` David Rientjes
2009-10-15 8:01 ` David Rientjes
2009-10-15 8:59 ` Ingo Molnar
2009-10-14 21:55 ` Frans Pop
2009-10-13 2:00 ` David Rientjes
2009-10-13 7:07 ` Ingo Molnar
2009-10-13 7:59 ` David Rientjes
2010-06-07 17:18 ` [PATCH, v2] kbuild: Improve version string logic - two for the price of one - No thanks Boaz Harrosh
2010-06-07 19:45 ` David Rientjes
2010-06-08 5:52 ` Boaz Harrosh
2010-06-08 6:18 ` David Rientjes
2010-06-08 6:34 ` Paul Mundt
2010-06-08 6:39 ` Boaz Harrosh
2010-06-08 7:16 ` Boaz Harrosh
2010-06-08 7:21 ` Paul Mundt
2010-06-08 7:21 ` Boaz Harrosh
2010-06-08 7:32 ` Paul Mundt
2010-06-08 7:52 ` Boaz Harrosh
2010-06-08 9:17 ` David Rientjes
2010-06-08 6:37 ` Boaz Harrosh
2010-06-08 8:31 ` kbuild: Fix the breakage caused by "improve version string logic" Boaz Harrosh
2010-06-08 9:13 ` David Rientjes
2010-06-08 10:14 ` Boaz Harrosh
2010-06-08 10:19 ` Boaz Harrosh
2010-06-09 6:55 ` David Rientjes
2010-06-09 7:54 ` Boaz Harrosh
2010-06-09 8:18 ` Mike Galbraith
2009-10-06 17:40 ` Linux 2.6.32-rc3 Len Brown
2009-10-06 18:16 ` Linus Torvalds
2009-10-07 22:33 ` Len Brown
2009-10-06 17:45 ` Dirk Hohndel
2009-10-06 19:22 ` Joel Becker
[not found] ` <4ACB77ED.6060104@grm.uci.cu>
2009-10-06 18:00 ` Herlin R. Matos Lastres
2009-10-15 15:51 ` Frans Pop
2009-10-06 15:42 ` Linus Torvalds
2009-10-06 17:09 ` Frans Pop
2009-10-06 17:34 ` Stefan Richter
2009-10-06 17:41 ` Linus Torvalds
2009-10-06 18:56 ` david
2009-10-06 18:23 ` Frans Pop
2009-10-06 19:23 ` Stefan Richter
2009-10-06 17:44 ` Theodore Tso
2009-10-06 18:14 ` Theodore Tso
2009-10-06 18:20 ` Linus Torvalds
2009-10-06 16:40 ` Frans Pop
2009-10-06 18:35 ` Linus Torvalds
2009-10-06 19:37 ` Frans Pop
2009-10-07 21:39 ` Steven Rostedt
2009-10-08 15:20 ` Frans Pop
2009-10-06 15:29 ` Stefan Richter
2009-10-06 17:08 ` Ingo Molnar
2009-10-06 17:20 ` Stefan Richter
2009-10-06 21:33 ` Benjamin Herrenschmidt
2009-10-06 22:19 ` Linus Torvalds
2009-10-07 1:22 ` Dave Airlie
2009-10-07 2:31 ` Theodore Tso
2009-10-07 2:45 ` Benjamin Herrenschmidt
2009-10-10 12:09 ` Pavel Machek
2009-10-10 12:18 ` Felipe Contreras
2009-10-07 3:23 ` Linus Torvalds
2009-10-07 3:31 ` Linus Torvalds
2009-10-07 13:52 ` Theodore Tso
2009-10-07 14:52 ` Mike Galbraith
2009-10-07 17:44 ` david
2009-10-07 18:13 ` Mike Galbraith
2009-10-07 4:02 ` Justin P. Mattock
2009-10-07 10:41 ` 2.6.32-rc3: floating-point build failure (undefined reference to `__udivdi3' in menu governor) Andreas Mohr
2009-10-07 14:23 ` Arjan van de Ven
2009-10-07 17:34 ` Andreas Mohr
2009-10-07 17:45 ` Arjan van de Ven [this message]
2009-10-07 17:45 ` Kyle McMartin
2009-10-09 16:01 ` Andreas Mohr
2009-10-09 16:32 ` Arjan van de Ven
2009-10-09 17:08 ` Kyle McMartin
2009-10-09 17:12 ` Arjan van de Ven
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