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Remove the support for HASH_DRBG. It's likely unused code, seeing as HMAC_DRBG is always enabled and prioritized over it unless NETLINK_CRYPTO is used to change the algorithm priorities. There's also no compelling reason to support more than one of [HMAC_DRBG, HASH_DRBG, CTR_DRBG]. By definition, callers cannot tell any difference in their outputs. And all are FIPS-certifiable, which is the only point of the kernel's NIST DRBGs anyway. Switching to HASH_DRBG doesn't seem all that compelling, either. For one, it's more complex than HMAC_DRBG. Thus, let's just drop HASH_DRBG support and focus on HMAC_DRBG. Signed-off-by: Eric Biggers <ebiggers@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>