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a8803d7421
The mailbox framework supports blocking transfers via completions for clients that can sleep. In order to support blocking transfers in cases where the transmission is not permitted to sleep, add a new ->flush() callback that controller drivers can implement to busy loop until the transmission has been completed. A new mbox_flush() function can be called by mailbox consumers in atomic context to make sure a transfer has completed. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.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.