From: Takashi Iwai <tiwai@suse.de>
To: "Arnd Bergmann" <arnd@arndb.de>
Cc: <viro@zeniv.linux.org.uk>, "Jeff Dike" <jdike@addtoit.com>,
<alsa-devel@alsa-project.org>,
"Mauro Carvalho Chehab" <mchehab+samsung@kernel.org>,
<linux-um@lists.infradead.org>,
"Richard Weinberger" <richard@nod.at>,
"Jaroslav Kysela" <perex@perex.cz>,
<linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 10/17] compat_ioctl: remove translation for sound ioctls
Date: Thu, 13 Sep 2018 15:37:29 +0200 [thread overview]
Message-ID: <s5h36ud5xie.wl-tiwai@suse.de> (raw)
In-Reply-To: <20180912151422.571531-1-arnd@arndb.de>
On Wed, 12 Sep 2018 17:13:02 +0200,
Arnd Bergmann wrote:
>
> The SNDCTL_* and SOUND_* commands are the old OSS user interface.
>
> I checked all the sound ioctl commands listed in fs/compat_ioctl.c
> to see if we still need the translation handlers. Here is what I
> found:
>
> - sound/oss/ is (almost) gone from the kernel, this is what actually
> needed all the translations
> - The ALSA emulation for OSS correctly handles all compat_ioctl
> commands already.
> - sound/oss/dmasound/ is the last holdout of the original OSS code,
> this is only used on arch/m68k, which has no 64-bit mode and
> hence needs no compat handlers
> - arch/um/drivers/hostaudio_kern.c may run in 64-bit mode with
> 32-bit x86 user space underneath it. This rare corner case is
> the only one that still needs the compat handlers.
>
> By adding a simple redirect of .compat_ioctl to .unlocked_ioctl in the
> UML driver, we can remove all the COMPATIBLE_IOCTL() annotations without
> a change in functionality. For completeness, I'm adding the same thing
> to the dmasound file, knowing that it makes no difference.
>
> The compat_ioctl list contains one comment about SNDCTL_DSP_MAPINBUF and
> SNDCTL_DSP_MAPOUTBUF, which actually would need a translation handler
> if implemented. However, the native implementation just returns -EINVAL,
> so we don't care.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Looks good to me.
Reviewed-by: Takashi Iwai <tiwai@suse.de>
thanks,
Takashi
next prev parent reply other threads:[~2018-09-13 13:37 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 15:01 [PATCH v2 01/17] compat_ioctl: add generic_compat_ioctl_ptrarg() Arnd Bergmann
2018-09-12 15:01 ` [PATCH v2 02/17] compat_ioctl: move drivers to generic_compat_ioctl_ptrarg Arnd Bergmann
2018-09-12 15:33 ` Jason Gunthorpe
2018-09-12 16:20 ` Arnd Bergmann
2018-09-12 18:13 ` Greg Kroah-Hartman
2018-09-16 19:07 ` Jarkko Sakkinen
2018-09-12 15:01 ` [PATCH v2 03/17] compat_ioctl: use correct compat_ptr() translation in drivers Arnd Bergmann
2018-09-12 18:13 ` Greg Kroah-Hartman
2018-09-13 0:48 ` Andrew Donnellan
2018-09-13 11:03 ` Felipe Balbi
2018-09-12 15:01 ` [PATCH v2 04/17] ceph: fix compat_ioctl for ceph_dir_operations Arnd Bergmann
2018-09-12 16:12 ` David Laight
2018-09-12 16:25 ` Arnd Bergmann
2018-09-13 0:48 ` Yan, Zheng
2018-09-12 15:08 ` [PATCH v2 05/17] compat_ioctl: move more drivers to generic_compat_ioctl_ptrarg Arnd Bergmann
2018-09-12 15:08 ` [PATCH v2 06/17] compat_ioctl: move rtc handling into rtc-dev.c Arnd Bergmann
2018-09-12 20:00 ` Alexandre Belloni
2018-09-12 15:08 ` [PATCH v2 07/17] compat_ioctl: move tape handling into drivers Arnd Bergmann
2018-09-12 15:08 ` [PATCH v2 08/17] compat_ioctl: remove keyboard ioctl translation Arnd Bergmann
2018-09-12 15:08 ` [PATCH v2 09/17] compat_ioctl: remove HIDIO translation Arnd Bergmann
2018-09-12 15:56 ` [PATCH v2 05/17] compat_ioctl: move more drivers to generic_compat_ioctl_ptrarg Jason Gunthorpe
2018-09-12 15:58 ` Daniel Vetter
2018-09-12 16:01 ` Mauro Carvalho Chehab
2018-09-12 18:13 ` Greg Kroah-Hartman
2018-09-14 14:23 ` David Sterba
2018-09-14 20:35 ` Darren Hart
2018-09-14 20:57 ` Al Viro
2018-09-18 17:51 ` Darren Hart
2018-09-18 17:59 ` Jason Gunthorpe
2018-09-24 20:18 ` Arnd Bergmann
2018-09-24 20:35 ` Jason Gunthorpe
2018-09-24 21:17 ` Arnd Bergmann
2018-09-17 9:33 ` Jonathan Cameron
2018-10-06 7:05 ` Bjorn Andersson
2018-09-12 15:13 ` [PATCH v2 10/17] compat_ioctl: remove translation for sound ioctls Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 11/17] compat_ioctl: remove isdn ioctl translation Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 12/17] compat_ioctl: remove IGNORE_IOCTL() Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 13/17] compat_ioctl: remove /dev/random commands Arnd Bergmann
2018-09-12 18:13 ` Greg Kroah-Hartman
2018-09-12 15:13 ` [PATCH v2 14/17] compat_ioctl: remove joystick ioctl translation Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 15/17] compat_ioctl: remove PCI " Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 16/17] compat_ioctl: remove /dev/raw " Arnd Bergmann
2018-09-12 15:13 ` [PATCH v2 17/17] compat_ioctl: remove last RAID handling code Arnd Bergmann
2018-09-13 13:37 ` Takashi Iwai [this message]
2018-09-13 2:07 ` [PATCH v2 01/17] compat_ioctl: add generic_compat_ioctl_ptrarg() Al Viro
2018-09-13 10:29 ` Arnd Bergmann
2018-10-28 17:07 ` Al Viro
2018-10-29 9:50 ` Arnd Bergmann
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