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4688bb13da
The era of hand-rolled HIWORD_UPDATE macros is over, at least for those drivers that use constant masks. The Rockchip PCIe PHY driver, used on the RK3399, has its own definition of HIWORD_UPDATE. Remove it, and replace instances of it with hw_bitfield.h's FIELD_PREP_WM16. To achieve this, some mask defines are reshuffled, as FIELD_PREP_WM16 uses the mask as both the mask of bits to write and to derive the shift amount from in order to shift the value. In order to ensure that the mask is always a constant, the inst->index shift is performed after the FIELD_PREP_WM16, as this is a runtime value. >From this, we gain compile-time error checking, and in my humble opinion nicer code, as well as a single definition of this macro across the entire codebase to aid in code comprehension. Tested on a RK3399 ROCKPro64, where PCIe still works as expected when accessing an NVMe drive. Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Yury Norov (NVIDIA) <yury.norov@gmail.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.