crypto_clone_ahash
fb = crypto_clone_ahash(crypto_ahash_fb(hash));
EXPORT_SYMBOL_GPL(crypto_clone_ahash);
hash = crypto_clone_ahash(sctx->hash);
struct crypto_ahash *crypto_clone_ahash(struct crypto_ahash *tfm);
tmp = crypto_clone_ahash(hash);
hash = crypto_clone_ahash(cpool[id].hash);