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Evaluate the register before the asm section so that the C compiler generates warnings when there is an issue with the register argument. This will prevent possible future issues such as the one seen here [1] where a missing bracket caused the shift and addition operators to be evaluated in the wrong order, but no warning was emitted. The GNU assembler has no warning for when expressions evaluate differently to C due to different operator precedence, but the C compiler has some warnings that may suggest something is wrong. For example in this case the following warning would have been emitted: error: operator '>>' has lower precedence than '+'; '+' will be evaluated first [-Werror,-Wshift-op-parentheses] There are currently no existing warnings that need to be fixed. [1]: https://lore.kernel.org/linux-perf-users/20230728162011.GA22050@willie-the-truck/ Signed-off-by: James Clark <james.clark@arm.com> Link: https://lore.kernel.org/r/20230815140639.614769-1-james.clark@arm.com Signed-off-by: Will Deacon <will@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 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.