From: Arnd Bergmann <arnd@arndb.de>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Vinod Koul <vinod.koul@linux.intel.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
devicetree-discuss@lists.ozlabs.org,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Jon Hunter <jon-hunter@ti.com>,
spi-devel-general@lists.sourceforge.net,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/5] spi: pl022: use generic DMA slave configuration if possible
Date: Fri, 08 Feb 2013 17:28:29 +0100 [thread overview]
Message-ID: <11938235.WbhQmuClDR@wuerfel> (raw)
In-Reply-To: <20130208162248.GY17833@n2100.arm.linux.org.uk>
On Friday 08 February 2013 16:22:48 Russell King - ARM Linux wrote:
> If it's DMA _to_ a device, then we will only ever clean the lines prior to
> a transfer, never invalidate them. So that's not really a concern. (There
> better not be any dirty cache lines associated with the empty zero page
> either.)
Right, makes sense. I thought I had read about a CPU that
could not flush a cache line without also invalidating
it, but that must have been something other than ARM,
or maybe I'm misremembering it.
Arnd
next prev parent reply other threads:[~2013-02-08 16:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1359395857-1235-1-git-send-email-arnd@arndb.de>
[not found] ` <1359395857-1235-1-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-01-28 17:57 ` [PATCH 2/5] spi: pl022: use generic DMA slave configuration if possible Arnd Bergmann
[not found] ` <1359395857-1235-3-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-02-05 14:22 ` Grant Likely
2013-02-07 18:27 ` Linus Walleij
2013-01-28 17:57 ` [PATCH 3/5] serial: pl011: " Arnd Bergmann
[not found] ` <1359395857-1235-4-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-02-05 14:22 ` Grant Likely
2013-01-28 21:58 ` [PATCH v2 0/5] dmaengine: convert dw_dmac/spear13xx to generic binding Arnd Bergmann
[not found] ` <1359410300-26113-1-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-01-28 21:58 ` [PATCH 2/5] spi: pl022: use generic DMA slave configuration if possible Arnd Bergmann
[not found] ` <1359410300-26113-3-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-01-29 2:41 ` Mark Brown
2013-01-29 7:49 ` Andy Shevchenko
2013-01-29 13:13 ` Arnd Bergmann
[not found] ` <201301291313.03511.arnd-r2nGTMty4D4@public.gmane.org>
2013-02-07 18:29 ` Linus Walleij
[not found] ` <CACRpkdZNpCJwp-uaH6feTcaPesNouwpHt-hO-M9v52G=Ux+Hqw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-07 19:42 ` Arnd Bergmann
[not found] ` <201302071942.54642.arnd-r2nGTMty4D4@public.gmane.org>
2013-02-07 20:19 ` Linus Walleij
[not found] ` <CACRpkdbunPGtR4p_kY4q8WEb8iwkEbdo_icDyrLZwKrCe0wXqw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-07 21:15 ` Arnd Bergmann
2013-02-08 16:22 ` Russell King - ARM Linux
2013-02-08 16:28 ` Arnd Bergmann [this message]
2013-02-08 22:10 ` Linus Walleij
2013-02-08 16:20 ` Russell King - ARM Linux
2013-01-28 21:58 ` [PATCH 3/5] serial: pl011: " Arnd Bergmann
[not found] ` <1359410300-26113-4-git-send-email-arnd-r2nGTMty4D4@public.gmane.org>
2013-01-30 4:38 ` Greg Kroah-Hartman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=11938235.WbhQmuClDR@wuerfel \
--to=arnd@arndb.de \
--cc=andriy.shevchenko@linux.intel.com \
--cc=broonie@opensource.wolfsonmicro.com \
--cc=devicetree-discuss@lists.ozlabs.org \
--cc=jon-hunter@ti.com \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux@arm.linux.org.uk \
--cc=spi-devel-general@lists.sourceforge.net \
--cc=vinod.koul@linux.intel.com \
--cc=viresh.kumar@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox