crypto_ahash_fb
HASH_REQUEST_ON_STACK(req, crypto_ahash_fb(tfm));
err = crypto_ahash_setkey(crypto_ahash_fb(tfm),
ahash_request_set_tfm(req, crypto_ahash_fb(tfm));
ahash_request_set_tfm(req, crypto_ahash_fb(tfm));
crypto_free_ahash(crypto_ahash_fb(hash));
fb = crypto_clone_ahash(crypto_ahash_fb(hash));
struct crypto_ahash *fb = crypto_ahash_fb(tctx->hash);
crypto_ahash_tfm(crypto_ahash_fb(tfm)));