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ffdd20555c
`i2c_*_dma_safe_msg_buf` APIs operate on a `struct i2c_msg`. The get operation make sure the I2C buffer is DMA'able according to its buffer length, or if the memory use is DMA coherent for example and return a valid pointer for safe DMA access to be used. The put operation release the pointer. Prefer using generic API's than relying on private tests. Acked-by: Alain Volmat <alain.volmat@foss.st.com> Signed-off-by: Clément Le Goffic <clement.legoffic@foss.st.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20250704-i2c-upstream-v4-3-84a095a2c728@foss.st.com |
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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.