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When running a kunit test, the driver runs with a mock device. As such, any attempt to read or write to a hardware register will fail the current test immediately. The dlist allocation management recently introduced will read the current frame count from the HVS to defer its destruction until a subsequent frame has been output. This obviously involves a register read that fails the Kunit tests. Change the destruction deferral function to destroy the allocation immediately if we run under kunit. This is essentially harmless since the main reason for that deferall is to prevent any access to the hardware dlist while a frame described by that list is rendered. On our mock driver, we have neither a hardware dlist nor a rendering, so it doesn't matter. Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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.
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