From: Christoph Hellwig <hch@lst.de>
To: Paul Cercueil <paul@crapouillou.net>
Cc: Christoph Hellwig <hch@lst.de>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Dave Airlie <airlied@linux.ie>,
DRI <dri-devel@lists.freedesktop.org>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the drm tree
Date: Mon, 28 Sep 2020 14:10:02 +0200 [thread overview]
Message-ID: <20200928121002.GA3219@lst.de> (raw)
In-Reply-To: <72ADHQ.T6LL1SHQF0RG3@crapouillou.net>
On Mon, Sep 28, 2020 at 01:46:55PM +0200, Paul Cercueil wrote:
>> dma_mmap_attrs can only be used on allocations from dma_mmap_attrs with
>> the same attrs. As there is no allocation using DMA_ATTR_NON_CONSISTENT
>> in the drm core, something looks very fishy here.
>
> Is that a fact? I don't see why you couldn't change the cache settings
> after allocation. In practice it works just fine.
Accessing the same physical address using different caching attributes
is undefined behavior and fairly dangerous on most architectures, and
thus not supported by the DMA API.
next prev parent reply other threads:[~2020-09-28 12:10 UTC|newest]
Thread overview: 217+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-28 3:54 linux-next: build failure after merge of the drm tree Stephen Rothwell
2020-09-28 3:54 ` Stephen Rothwell
2020-09-28 6:04 ` Christoph Hellwig
2020-09-28 6:08 ` Dave Airlie
2020-09-28 6:08 ` Dave Airlie
2020-09-28 6:14 ` Christoph Hellwig
2020-09-28 10:15 ` Paul Cercueil
2020-09-28 10:15 ` Paul Cercueil
2020-09-28 11:34 ` Christoph Hellwig
2020-09-28 11:46 ` Paul Cercueil
2020-09-28 11:46 ` Paul Cercueil
2020-09-28 12:10 ` Christoph Hellwig [this message]
2020-09-28 13:31 ` Paul Cercueil
2020-09-28 13:31 ` Paul Cercueil
2020-09-30 9:02 ` Christoph Hellwig
2020-09-30 13:33 ` Paul Cercueil
2020-09-30 13:33 ` Paul Cercueil
2020-09-30 16:11 ` Christoph Hellwig
2020-09-30 16:39 ` Paul Cercueil
2020-09-30 16:39 ` Paul Cercueil
2020-09-30 16:40 ` Christoph Hellwig
2020-09-30 16:45 ` Paul Cercueil
2020-09-30 16:45 ` Paul Cercueil
2020-09-30 16:52 ` Christoph Hellwig
2020-09-30 17:16 ` [PATCH 1/3] drm: Add and export function drm_gem_cma_create_noalloc Paul Cercueil
2020-09-30 17:16 ` Paul Cercueil
2020-10-01 8:51 ` Daniel Vetter
2020-10-01 8:51 ` Daniel Vetter
2020-09-30 17:16 ` [PATCH 2/3] drm/ingenic: Update code to mmap GEM buffers cached Paul Cercueil
2020-09-30 17:16 ` Paul Cercueil
2020-10-01 5:32 ` Christoph Hellwig
2020-09-30 17:16 ` [PATCH 3/3] drm/ingenic: Alloc cached GEM buffers with dma_alloc_noncoherent Paul Cercueil
2020-09-30 17:16 ` Paul Cercueil
2020-10-01 5:35 ` Christoph Hellwig
2020-10-04 14:17 ` [PATCH] Revert "gpu/drm: ingenic: Add option to mmap GEM buffers cached" Paul Cercueil
2020-10-04 14:17 ` Paul Cercueil
2020-10-04 19:59 ` Sam Ravnborg
2020-10-04 19:59 ` Sam Ravnborg
2020-10-04 20:11 ` Paul Cercueil
2020-10-04 20:11 ` Paul Cercueil
2020-10-05 12:01 ` Stephen Rothwell
2020-10-05 12:01 ` Stephen Rothwell
2020-10-05 14:05 ` Daniel Vetter
2020-10-05 14:05 ` Daniel Vetter
2020-10-05 14:47 ` Paul Cercueil
2020-10-05 14:47 ` Paul Cercueil
2020-10-05 17:38 ` Daniel Vetter
2020-10-05 17:38 ` Daniel Vetter
2020-10-05 22:31 ` Daniel Vetter
2020-10-05 22:31 ` Daniel Vetter
2020-10-06 4:30 ` Stephen Rothwell
2020-10-06 4:30 ` Stephen Rothwell
-- strict thread matches above, loose matches on Subject: below --
2023-04-11 6:47 linux-next: build failure after merge of the drm tree Stephen Rothwell
2023-04-11 6:47 ` Stephen Rothwell
2023-01-19 2:12 Stephen Rothwell
2023-01-19 2:12 ` Stephen Rothwell
2022-09-30 10:54 broonie
2022-10-04 2:20 ` Stephen Rothwell
2022-10-04 2:20 ` Stephen Rothwell
2022-10-04 2:24 ` David Airlie
2022-10-04 2:24 ` David Airlie
2022-10-04 3:05 ` Stephen Rothwell
2022-10-04 3:05 ` Stephen Rothwell
2022-10-04 11:39 ` Mark Brown
2022-10-04 11:39 ` Mark Brown
2022-10-05 15:30 ` Alex Deucher
2022-10-05 15:30 ` Alex Deucher
2022-10-05 16:45 ` Hamza Mahfooz
2022-10-05 16:45 ` Hamza Mahfooz
2022-10-05 22:28 ` Stephen Rothwell
2022-10-05 22:28 ` Stephen Rothwell
2022-10-06 8:12 ` Stephen Rothwell
2022-10-06 8:12 ` Stephen Rothwell
2022-10-06 13:56 ` Alex Deucher
2022-10-06 13:56 ` Alex Deucher
2022-10-06 16:52 ` Stephen Rothwell
2022-10-06 16:52 ` Stephen Rothwell
2022-10-06 16:25 ` Hamza Mahfooz
2022-10-06 16:25 ` Hamza Mahfooz
2022-02-25 16:42 broonie
2022-02-25 16:42 ` broonie
2022-02-28 3:46 ` Stephen Rothwell
2022-02-28 3:46 ` Stephen Rothwell
2022-02-28 6:44 ` Hsin-Yi Wang
2022-02-28 6:44 ` Hsin-Yi Wang
2022-02-28 6:48 ` Dave Airlie
2022-02-28 6:48 ` Dave Airlie
2022-02-28 15:33 ` Robert Foss
2022-02-28 15:33 ` Robert Foss
2022-03-01 6:58 ` Dave Airlie
2021-08-20 2:33 Stephen Rothwell
2021-08-20 6:23 ` Masahiro Yamada
2021-09-01 21:50 ` Stephen Rothwell
2021-09-05 22:49 ` Stephen Rothwell
2021-09-06 7:34 ` Daniel Vetter
2021-09-06 7:34 ` Daniel Vetter
2021-09-08 3:13 ` Masahiro Yamada
2021-09-08 9:07 ` Daniel Vetter
2021-09-08 9:07 ` Daniel Vetter
2021-04-09 3:36 Stephen Rothwell
2021-04-09 3:36 ` Stephen Rothwell
2021-01-08 0:55 Stephen Rothwell
2021-01-08 0:55 ` Stephen Rothwell
2021-01-08 1:25 ` Stephen Rothwell
2021-01-08 1:25 ` Stephen Rothwell
2021-01-10 23:56 ` Stephen Rothwell
2021-01-10 23:56 ` Stephen Rothwell
2021-01-18 0:59 ` Stephen Rothwell
2021-01-18 0:59 ` Stephen Rothwell
2021-01-18 1:06 ` Dave Airlie
2021-01-18 1:06 ` Dave Airlie
2021-01-20 12:12 ` Daniel Vetter
2021-01-20 12:12 ` Daniel Vetter
2021-01-20 20:44 ` Stephen Rothwell
2021-01-20 20:44 ` Stephen Rothwell
2020-12-09 1:53 Stephen Rothwell
2020-12-09 1:53 ` Stephen Rothwell
2020-05-08 4:29 Stephen Rothwell
2020-05-08 4:29 ` Stephen Rothwell
2019-11-05 2:54 Stephen Rothwell
2019-11-05 2:54 ` Stephen Rothwell
2019-10-10 0:22 Stephen Rothwell
2019-10-10 0:22 ` Stephen Rothwell
2019-07-08 4:48 Stephen Rothwell
2019-07-08 4:48 ` Stephen Rothwell
2019-04-26 2:17 Stephen Rothwell
2019-04-26 2:17 ` Stephen Rothwell
2018-05-16 6:53 Stephen Rothwell
2018-05-16 6:53 ` Stephen Rothwell
2018-05-16 8:09 ` Oded Gabbay
2018-05-16 8:09 ` Oded Gabbay
2018-05-17 5:00 ` Dave Airlie
2018-05-17 5:00 ` Dave Airlie
2018-03-13 5:46 Stephen Rothwell
2018-01-02 1:48 Stephen Rothwell
2017-09-28 4:57 Stephen Rothwell
2017-03-20 0:51 Stephen Rothwell
2017-03-20 0:51 ` Stephen Rothwell
2017-03-20 8:03 ` Daniel Vetter
2017-03-20 8:03 ` Daniel Vetter
2017-03-20 8:05 ` Daniel Vetter
2017-03-20 8:05 ` Daniel Vetter
2017-02-23 23:25 Stephen Rothwell
2017-01-24 1:25 Stephen Rothwell
2017-01-25 10:52 ` Vincent ABRIOU
2016-07-15 3:40 Stephen Rothwell
2016-07-15 3:40 ` Stephen Rothwell
2016-07-15 4:32 ` Sedat Dilek
2016-04-28 1:57 Stephen Rothwell
2016-04-28 1:57 ` Stephen Rothwell
2016-04-28 8:11 ` Jani Nikula
2016-04-28 8:11 ` Jani Nikula
2016-03-17 4:41 Stephen Rothwell
2016-03-17 8:41 ` Christian König
2016-03-17 8:41 ` Christian König
2016-02-22 0:45 Stephen Rothwell
2015-12-31 10:31 Stephen Rothwell
2016-01-07 2:44 ` Stephen Rothwell
2016-01-11 22:54 ` Stephen Rothwell
2016-01-12 0:31 ` Dave Airlie
2016-01-12 4:35 ` Stephen Rothwell
2016-01-12 7:48 ` Zhu, Rex
2015-12-31 2:40 Stephen Rothwell
2015-12-31 5:14 ` Mark yao
2015-11-04 9:22 Stephen Rothwell
2015-11-09 16:45 ` Guenter Roeck
2015-11-10 4:55 ` Alexandre Courbot
2015-10-06 1:09 Stephen Rothwell
2015-06-09 13:42 Stephen Rothwell
2015-06-09 14:02 ` Deucher, Alexander
2015-06-10 0:28 ` Stephen Rothwell
2015-05-20 3:08 Stephen Rothwell
2015-05-20 4:41 ` Dave Airlie
2015-05-20 5:25 ` Stephen Rothwell
2015-05-20 5:31 ` Stephen Rothwell
2015-05-20 6:01 ` Oded Gabbay
2015-05-20 6:08 ` Dave Airlie
2015-01-29 2:38 Stephen Rothwell
2015-01-29 8:21 ` Oded Gabbay
2015-01-29 8:21 ` Oded Gabbay
2015-01-29 9:35 ` Stephen Rothwell
2015-01-29 9:35 ` Stephen Rothwell
2014-09-08 4:26 Stephen Rothwell
2014-06-05 4:12 Stephen Rothwell
2014-06-05 4:28 ` Stephen Rothwell
2012-09-24 3:18 Stephen Rothwell
2012-09-24 11:31 ` Daniel Vetter
2012-09-24 11:58 ` Stephen Rothwell
2012-08-24 3:49 Stephen Rothwell
2012-05-17 3:47 Stephen Rothwell
2012-04-30 3:22 Stephen Rothwell
2012-04-23 3:42 Stephen Rothwell
2012-03-16 2:53 Stephen Rothwell
2012-03-19 2:45 ` Stephen Rothwell
2011-11-28 2:49 Stephen Rothwell
2011-11-16 0:30 Stephen Rothwell
2011-11-16 10:16 ` Alan Cox
2011-11-16 16:42 ` Jesse Barnes
2011-11-25 1:49 ` Stephen Rothwell
2011-11-25 10:30 ` Alan Cox
2011-11-25 10:34 ` Dave Airlie
2011-11-28 2:53 ` Stephen Rothwell
2011-11-28 11:30 ` Alan Cox
2011-11-28 13:13 ` Stephen Rothwell
2011-11-28 13:18 ` Alan Cox
2011-11-28 13:53 ` Stephen Rothwell
2011-11-28 14:05 ` Dave Airlie
2011-11-28 14:08 ` Alan Cox
2011-11-28 2:52 ` Stephen Rothwell
2011-11-28 5:07 ` Greg KH
2011-11-28 11:33 ` Alan Cox
2011-03-15 3:49 Stephen Rothwell
2010-04-08 3:12 Stephen Rothwell
2010-04-08 3:52 ` Dave Airlie
2010-04-08 4:14 ` Stephen Rothwell
2010-04-08 16:19 ` Tony Luck
2010-04-08 20:50 ` Pauli Nieminen
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