ca4477e41c
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. To merge the scalar, NEON, and CE code all into one module cleanly, add !CPU_V7M as a direct dependency of the CE code. Previously, !CPU_V7M was only a direct dependency of the scalar and NEON code. The result is still the same because CPU_V7M implies !KERNEL_MODE_NEON, so !CPU_V7M was already an indirect dependency of the CE code. To match sha256_blocks_arch(), change the type of the nblocks parameter of the assembly functions from int to size_t. The assembly functions actually already treated it as size_t. While renaming the assembly files, also fix the naming quirk where "sha2" meant sha256. (SHA-512 is also part of SHA-2.) 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.