crypto_tfm_alg_instance
struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
return aead_instance(crypto_tfm_alg_instance(&aead->base));
return akcipher_instance(crypto_tfm_alg_instance(&akcipher->base));
return ahash_instance(crypto_tfm_alg_instance(&ahash->base));
return shash_instance(crypto_tfm_alg_instance(&shash->base));
return kpp_instance(crypto_tfm_alg_instance(&kpp->base));
return sig_instance(crypto_tfm_alg_instance(&tfm->base));