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a9a2c82360
We moved cache management decision making to the upper layer and rely on buffer's need_cache_sync flags and videobuf2 core. If the upper layer (core) has decided to invoke ->prepare() or ->finish() then we must sync. For DMABUF ->need_cache_sync_on_prepare and ->need_cache_sync_on_flush are always false so videobuf core does not call ->prepare() and ->finish() on such buffers. Additionally, scratch the DMABUF comment. Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.