Sergey Senozhatsky
129134e541
media: media/v4l2: remove V4L2_FLAG_MEMORY_NON_CONSISTENT flag
...
The patch partially reverts some of the UAPI bits of the buffer
cache management hints. Namely, the queue consistency (memory
coherency) user-space hint because, as it turned out, the kernel
implementation of this feature was misusing DMA_ATTR_NON_CONSISTENT.
The patch reverts both kernel and user space parts: removes the
DMA consistency attr functions, rolls back changes to v4l2_requestbuffers,
v4l2_create_buffers structures and corresponding UAPI functions
(plus compat32 layer) and cleans up the documentation.
[hverkuil: fixed a few typos in the commit log]
[hverkuil: fixed vb2_core_reqbufs call in drivers/media/dvb-core/dvb_vb2.c]
[mchehab: fixed a typo in the commit log: revers->reverts]
Signed-off-by: Christoph Hellwig <hch@lst.de >
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com >
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl >
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org >
2020-09-14 15:28:06 +02:00
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