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dma-buf destructor support is useful as it allows clients an opportunity to undo any attributes, such as security attributes, they have applied to the dma-buf's memory. The destructor is called when the dma-buf is freed, if the destructor returns an error the dma-buf's exporter release function is not called in order to ensure that memory which has not been properly cleaned up isn't returned to the system. Signed-off-by: Liam Mark <lmark@codeaurora.org> Signed-off-by: Swathi Sridhar <swatsrid@codeaurora.org> [surenb: cherry-picked from: 3af4db1543c9 "dma-buf: Add support to set a destructor on a dma-buf"] Bug: 150611569 Test: build Signed-off-by: Suren Baghdasaryan <surenb@google.com> Change-Id: I2d435b99fb9b1747bc1b32a4e0d484957614a5a3
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.