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mt8183_is_volatile_reg() is a large switch-case block that lists out every register that is volatile. Since many pairs of registers have consecutive addresses, the cases can be compressed down with the ellipsis, i.e. GCC extension "case ranges" [1] to cover more addresses in one case, shortening the source code. This is not completely the same, since the addresses are 4-byte aligned, and using the case ranges feature adds all unaligned addresses in between. In practice this doesn't matter since the unaligned addresses are blocked by the regmap core. This also ends up compiling slightly smaller with a reduction of 128 bytes in the text section. [1] https://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://patch.msgid.link/20250515073825.4155297-4-wenst@chromium.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.