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8dbcc3fa38
The v4l2-compat-ioctl32() currently takes an extra round trip through user space pointers when converting the data structure formats. In particular, this involves using the compat_alloc_user_space() and copy_in_user() helpers that often lead to worse compat handlers compared to using in_compat_syscall() checks when copying the data. The native implementation already gained a simpler method to deal with the conversion for the time32 conversion. Hook into the same places to provide a location for reading and writing user space data from inside of the generic video_usercopy() helper. Hans Verkuil rewrote the video_get_user() function here to simplify the zeroing of the extra input fields and fixed a couple of bugs in the original implementation. [hverkuil: fix: CHECK: Please don't use multiple blank lines] Co-developed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| tuner-core.c | ||
| v4l2-async.c | ||
| v4l2-clk.c | ||
| v4l2-common.c | ||
| v4l2-compat-ioctl32.c | ||
| v4l2-ctrls.c | ||
| v4l2-dev.c | ||
| v4l2-device.c | ||
| v4l2-dv-timings.c | ||
| v4l2-event.c | ||
| v4l2-fh.c | ||
| v4l2-flash-led-class.c | ||
| v4l2-fwnode.c | ||
| v4l2-h264.c | ||
| v4l2-i2c.c | ||
| v4l2-ioctl.c | ||
| v4l2-jpeg.c | ||
| v4l2-mc.c | ||
| v4l2-mem2mem.c | ||
| v4l2-spi.c | ||
| v4l2-subdev.c | ||
| v4l2-trace.c | ||
| videobuf-core.c | ||
| videobuf-dma-contig.c | ||
| videobuf-dma-sg.c | ||
| videobuf-vmalloc.c | ||