fscrypt_hkdf_expand
void fscrypt_hkdf_expand(const struct hmac_sha512_key *hkdf, u8 context,
fscrypt_hkdf_expand(&secret->hkdf, keyid_kdf_ctx, NULL, 0,
fscrypt_hkdf_expand(&secret.hkdf,
fscrypt_hkdf_expand(&mk->mk_secret.hkdf, hkdf_context, hkdf_info,
fscrypt_hkdf_expand(&mk->mk_secret.hkdf, context, info, infolen,
fscrypt_hkdf_expand(&mk->mk_secret.hkdf,