Hey again, Actually... It looks like the issue is that in this file: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/crypto/internal/blake2s.h this line typedef void (*blake2s_compress_t)(struct blake2s_state *state, const u8 *block, size_t nblocks, u32 inc); should become typedef void (*blake2s_compress_t)(struct blake2s_state *state, const u8 *block, size_t nblocks, const u32 inc); Does making that change fix things for you? Thanks, Jason