commit 35fe2034c1d6089217bb91f8c4da2f9afbb88d4d
author Gilles Peskine <Gilles.Peskine@arm.com> Wed Aug 22 18:26:02 2018 +0200
committer Gilles Peskine <Gilles.Peskine@arm.com> Thu Sep 20 12:00:21 2018 +0200
tree cfb2cb5050934b5519ca6e826050b4722298d680
parent 00709fafb80ea8a8ab3963a0880e5585257d7339

PSA_MAC_FINAL_SIZE: we don't use key_bits at the moment

None of the currently defined MAC algorithms have a MAC size that
depends on the key size, so the key_bits parameter is unused. The
key_type parameter may be unused on an implementation where there is
no block cipher MAC. Declare the key_type and key_bits parameters as
used so that callers who define a variable just for this don't risk
getting "unused variable" warnings.

include/psa/crypto_sizes.h

diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h
index 988c43f..4aa7cd8 100644
--- a/include/psa/crypto_sizes.h
+++ b/include/psa/crypto_sizes.h
@@ -162,7 +162,7 @@
 #define PSA_MAC_FINAL_SIZE(key_type, key_bits, alg)                     \
     (PSA_ALG_IS_HMAC(alg) ? PSA_HASH_SIZE(PSA_ALG_HMAC_GET_HASH(alg)) : \
      PSA_ALG_IS_BLOCK_CIPHER_MAC(alg) ? PSA_BLOCK_CIPHER_BLOCK_SIZE(key_type) : \
-     0)
+     ((void)(key_type), (void)(key_bits), 0))
 
 /** The maximum size of the output of psa_aead_encrypt(), in bytes.
  *