HKDF_HMAC_ALG 74 fs/crypto/hkdf.c hmac_tfm = crypto_alloc_shash(HKDF_HMAC_ALG, 0, 0); HKDF_HMAC_ALG 76 fs/crypto/hkdf.c fscrypt_err(NULL, "Error allocating " HKDF_HMAC_ALG ": %ld",