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Userspace clients will be able to restrict cache maintenance to only the subset of the dma-buf which is mmap(ed) by setting the DMA_BUF_SYNC_USER_MAPPED flag when calling the DMA_BUF_IOCTL_SYNC IOCT. Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org> Bug: 150611569 Test: build (cherry-picked from bbbc80b6d8b75ffea6a0eb1f53ab503ccf0011f1) [surenb: partial cherry-pick from bbbc80b6d8b7 ion : Merge ion changes from ... to resolve ABI diffs caused by {begin/end}_cpu_access_umapped dma_buf_ops. changed dma_buf_end_cpu_access_umapped to be static.] Signed-off-by: Suren Baghdasaryan <surenb@google.com> Change-Id: Ic2029c5218ca99330a0e7e6128e12ac29cdd1c08
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.
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