From: clemens@ladisch.de (Clemens Ladisch)
To: linux-arm-kernel@lists.infradead.org
Subject: [alsa-devel] Question on arm64 unaligned faults during playback
Date: Tue, 09 Dec 2014 09:19:55 +0100 [thread overview]
Message-ID: <5486B0AB.7000109@ladisch.de> (raw)
In-Reply-To: <CAM4voam0h4e1Z8q3eqNpgMhhfw-zJpfh7fi4iznX_Y0bj98nKA@mail.gmail.com>
Abhilash Kesavan wrote:
> Currently, if I continue to use the SRAM allocation driver, two
> options are working:
> 1) ioremap to ioremap_wc in drivers/misc/sram.c.
> 2) copy_from_user to copy_from_user_toio in sound/core/pcm_lib.c
>
> Which would be the preferred option ?
I don't know how to tell the SRAM allocator to hand out WC memory, but
copy_from_user_toio() is what you would put into your .copy callback.
Regards,
Clemens
next prev parent reply other threads:[~2014-12-09 8:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAM4voa=kiLsiLEzUbo3D+f1go5px78fXBSjSi7kGK4QCdnwPyQ@mail.gmail.com>
[not found] ` <54856621.8090107@ladisch.de>
[not found] ` <s5hppbumnis.wl-tiwai@suse.de>
2014-12-08 11:15 ` [alsa-devel] Question on arm64 unaligned faults during playback Lars-Peter Clausen
2014-12-08 11:31 ` Will Deacon
2014-12-09 2:56 ` Abhilash Kesavan
2014-12-08 12:04 ` Takashi Iwai
2014-12-08 12:25 ` Catalin Marinas
2014-12-09 2:56 ` Abhilash Kesavan
2014-12-09 8:19 ` Clemens Ladisch [this message]
2014-12-09 11:43 ` Catalin Marinas
2014-12-10 4:10 ` Abhilash Kesavan
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