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

From: Arnd Bergmann
Date: Thu Sep 17 2020 - 11:50:28 EST

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.

Given the complexity of the code, I am fairly sure that there
are bugs I missed.

Please review and test if possible.


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 | 1774 ++++++-----------
drivers/media/v4l2-core/v4l2-ioctl.c | 120 +-
include/media/v4l2-ioctl.h | 11 +
include/uapi/linux/videodev2.h | 2 +-
9 files changed, 729 insertions(+), 1247 deletions(-)