chacha_crypt_arch
chacha_crypt_arch(state, dst, src, bytes, nrounds);
asmlinkage void chacha_crypt_arch(struct chacha_state *state,
chacha_crypt_arch(&chacha_state, cipher, plain, data_size, 20);
chacha_crypt_arch(&chacha_state, revert, cipher, data_size, 20);