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Migrate the arm-optimized BLAKE2b code from arch/arm/crypto/ to
lib/crypto/arm/. This makes the BLAKE2b library able to use it, and it
also simplifies the code because it's easier to integrate with the
library than crypto_shash.
This temporarily makes the arm-optimized BLAKE2b code unavailable via
crypto_shash. A later commit reimplements the blake2b-* crypto_shash
algorithms on top of the BLAKE2b library API, making it available again.
Note that as per the lib/crypto/ convention, the optimized code is now
enabled by default. So, this also fixes the longstanding issue where
the optimized BLAKE2b code was not enabled by default.
To see the diff from arch/arm/crypto/blake2b-neon-glue.c to
lib/crypto/arm/blake2b.h, view this commit with 'git show -M10'.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20251018043106.375964-8-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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