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6e36be511d
Instead of providing crypto_shash algorithms for the arch-optimized SHA-256 code, instead implement the SHA-256 library. This is much simpler, it makes the SHA-256 library functions be arch-optimized, and it fixes the longstanding issue where the arch-optimized SHA-256 was disabled by default. SHA-256 still remains available through crypto_shash, but individual architectures no longer need to handle it. Remove support for SHA-256 finalization from the ARMv8 CE assembly code, since the library does not yet support architecture-specific overrides of the finalization. (Support for that has been omitted for now, for simplicity and because usually it isn't performance-critical.) To match sha256_blocks_arch(), change the type of the nblocks parameter of the assembly functions from int or 'unsigned int' to size_t. Update the ARMv8 CE assembly function accordingly. The scalar and NEON assembly functions actually already treated it as size_t. While renaming the assembly files, also fix the naming quirks where "sha2" meant sha256, and "sha512" meant both sha256 and sha512. Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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.