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36db0b03d3
Using coherent memory here isn't functionally necessary, we're only either sending data to the device or reading from it. This means explicit synchronizations are only required around those points and the change is fairly trivial. This gives us around a 10% increase in throughput for large DMA transfers and no loss for small transfers. Suggested-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Frank Li <Frank.Li@nxp.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: James Clark <james.clark@linaro.org> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Message-ID: <20250902-james-nxp-spi-dma-v6-4-f7aa2c5e56e2@linaro.org> Signed-off-by: Mark Brown <broonie@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 reStructuredText 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.