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Instead of exposing the x86-optimized SHA-512 code via x86-specific
crypto_shash algorithms, instead just implement the sha512_blocks()
library function. This is much simpler, it makes the SHA-512 (and
SHA-384) library functions be x86-optimized, and it fixes the
longstanding issue where the x86-optimized SHA-512 code was disabled by
default. SHA-512 still remains available through crypto_shash, but
individual architectures no longer need to handle it.
To match sha512_blocks(), 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.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250630160320.2888-15-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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