[PATCH v2 0/8] media: v4l2: simplify compat ioctl handling

Arnd Bergmann
2020-10-30T16:55:41Z

I have a series to remove all uses of compat_alloc_user_space() and
copy_in_user() from the kernel, this is the part of it that involves
the v4l2 compat code.

The resulting code is significantly shorter and arguably more readable,
but I have not done any testing beyond compilation on it, so at the
minimum this first needs to pass the test suite for both native and
compat users space.

The first version had a number of bugs that Hans Verkuil managed to
fix, I have now rebased my series on top of linux-5.10-rc1 and included
his bugfixes.

This series and the remaining changes for removing compat_alloc_user_space
are available for further testing in

https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git compat-alloc-user-space-4

Arnd

Arnd Bergmann (8):
media: v4l2: prepare compat-ioctl rework
media: v4l2: remove unneeded compat ioctl handlers
media: v4l2: move v4l2_ext_controls conversion
media: v4l2: move compat handling for v4l2_buffer
media: v4l2: allocate v4l2_clip objects early
media: v4l2: convert v4l2_format compat ioctls
media: v4l2: remaining compat handlers
media: v4l2: remove remaining compat_ioctl

drivers/media/common/saa7146/saa7146_video.c | 6 +-
drivers/media/pci/bt8xx/bttv-driver.c | 8 +-
drivers/media/pci/saa7134/saa7134-video.c | 19 +-
.../media/test-drivers/vivid/vivid-vid-cap.c | 18 +-
.../media/test-drivers/vivid/vivid-vid-out.c | 18 +-
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1773 ++++++-----------
drivers/media/v4l2-core/v4l2-ioctl.c | 182 +-
include/media/v4l2-ioctl.h | 11 +
include/uapi/linux/videodev2.h | 2 +-
9 files changed, 760 insertions(+), 1277 deletions(-)

Cc: linux-media@vger.kernel.org
Cc: mchehab@kernel.org
Cc: hverkuil@xs4all.nl
Cc: hch@lst.de
Cc: linux-kernel@vger.kernel.org

--
2.27.0