crypto: ghash - add comment and improve help text
To help avoid confusion, add a comment to ghash-generic.c which explains the convention that the kernel's implementation of GHASH uses. Also update the Kconfig help text and module descriptions to call GHASH a "hash function" rather than a "message digest", since the latter normally means a real cryptographic hash function, which GHASH is not. Cc: Pascal Van Leeuwen <pvanleeuwen@verimatrix.com> Signed-off-by: NEric Biggers <ebiggers@google.com> Reviewed-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: NPascal Van Leeuwen <pvanleeuwen@verimatrix.com> Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
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