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Our SCTLR_ELx field definitions are somewhat over-engineered in that they carefully define masks describing the RES0/RES1 bits and then use these to construct further masks representing bits to be set/cleared for the _EL1 and _EL2 registers. However, most of the resulting definitions aren't actually used by anybody and have subsequently started to bit-rot when new fields have been added by the architecture, resulting in fields being part of the RES0 mask despite being defined and used elsewhere. Rather than fix up these masks, simply remove the unused parts entirely so that we can drop the maintenance burden. We can always add things back if we need them in the future. Acked-by: Mark Rutland <mark.rutland@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.