From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753588AbaIEXCD (ORCPT ); Fri, 5 Sep 2014 19:02:03 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:44312 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752104AbaIEXCA (ORCPT ); Fri, 5 Sep 2014 19:02:00 -0400 From: behanw@converseincode.com To: davem@davemloft.net, herbert@gondor.apana.org.au, tadeusz.struk@intel.com Cc: bruce.w.allan@intel.com, john.griffin@intel.com, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, qat-linux@intel.com, torvalds@linux-foundation.org, Behan Webster , Mark Charlebois , =?UTF-8?q?Jan-Simon=20M=C3=B6ller?= Subject: [PATCH] crypto: LLVMLinux: Remove VLAIS from crypto/.../qat_algs.c Date: Fri, 5 Sep 2014 16:01:47 -0700 Message-Id: <1409958107-1805-1-git-send-email-behanw@converseincode.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Behan Webster Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99 compliant equivalent. This patch allocates the appropriate amount of memory using an char array. The new code can be compiled with both gcc and clang. struct shash_desc contains a flexible array member member ctx declared with CRYPTO_MINALIGN_ATTR, so sizeof(struct shash_desc) aligns the beginning of the array declared after struct shash_desc with long long. No trailing padding is required because it is not a struct type that can be used in an array. The CRYPTO_MINALIGN_ATTR is required so that desc is aligned with long long as would be the case for a struct containing a member with CRYPTO_MINALIGN_ATTR. Signed-off-by: Behan Webster Signed-off-by: Mark Charlebois Signed-off-by: Jan-Simon Möller --- drivers/crypto/qat/qat_common/qat_algs.c | 33 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 17 deletions(-) diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c index 59df488..3090333 100644 --- a/drivers/crypto/qat/qat_common/qat_algs.c +++ b/drivers/crypto/qat/qat_common/qat_algs.c @@ -152,10 +152,9 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, const uint8_t *auth_key, unsigned int auth_keylen, uint8_t *auth_state) { - struct { - struct shash_desc shash; - char ctx[crypto_shash_descsize(ctx->hash_tfm)]; - } desc; + char desc[sizeof(struct shash_desc) + + crypto_shash_descsize(ctx->hash_tfm)] CRYPTO_MINALIGN_ATTR; + struct shash_desc *shash = (struct shash_desc *)desc; struct sha1_state sha1; struct sha256_state sha256; struct sha512_state sha512; @@ -167,12 +166,12 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, __be64 *hash512_state_out; int i, offset; - desc.shash.tfm = ctx->hash_tfm; - desc.shash.flags = 0x0; + shash->tfm = ctx->hash_tfm; + shash->flags = 0x0; if (auth_keylen > block_size) { char buff[SHA512_BLOCK_SIZE]; - int ret = crypto_shash_digest(&desc.shash, auth_key, + int ret = crypto_shash_digest(shash, auth_key, auth_keylen, buff); if (ret) return ret; @@ -195,10 +194,10 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, *opad_ptr ^= 0x5C; } - if (crypto_shash_init(&desc.shash)) + if (crypto_shash_init(shash)) return -EFAULT; - if (crypto_shash_update(&desc.shash, ipad, block_size)) + if (crypto_shash_update(shash, ipad, block_size)) return -EFAULT; hash_state_out = (__be32 *)hash->sha.state1; @@ -206,19 +205,19 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, switch (ctx->qat_hash_alg) { case ICP_QAT_HW_AUTH_ALGO_SHA1: - if (crypto_shash_export(&desc.shash, &sha1)) + if (crypto_shash_export(shash, &sha1)) return -EFAULT; for (i = 0; i < digest_size >> 2; i++, hash_state_out++) *hash_state_out = cpu_to_be32(*(sha1.state + i)); break; case ICP_QAT_HW_AUTH_ALGO_SHA256: - if (crypto_shash_export(&desc.shash, &sha256)) + if (crypto_shash_export(shash, &sha256)) return -EFAULT; for (i = 0; i < digest_size >> 2; i++, hash_state_out++) *hash_state_out = cpu_to_be32(*(sha256.state + i)); break; case ICP_QAT_HW_AUTH_ALGO_SHA512: - if (crypto_shash_export(&desc.shash, &sha512)) + if (crypto_shash_export(shash, &sha512)) return -EFAULT; for (i = 0; i < digest_size >> 3; i++, hash512_state_out++) *hash512_state_out = cpu_to_be64(*(sha512.state + i)); @@ -227,10 +226,10 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, return -EFAULT; } - if (crypto_shash_init(&desc.shash)) + if (crypto_shash_init(shash)) return -EFAULT; - if (crypto_shash_update(&desc.shash, opad, block_size)) + if (crypto_shash_update(shash, opad, block_size)) return -EFAULT; offset = round_up(qat_get_inter_state_size(ctx->qat_hash_alg), 8); @@ -239,19 +238,19 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash, switch (ctx->qat_hash_alg) { case ICP_QAT_HW_AUTH_ALGO_SHA1: - if (crypto_shash_export(&desc.shash, &sha1)) + if (crypto_shash_export(shash, &sha1)) return -EFAULT; for (i = 0; i < digest_size >> 2; i++, hash_state_out++) *hash_state_out = cpu_to_be32(*(sha1.state + i)); break; case ICP_QAT_HW_AUTH_ALGO_SHA256: - if (crypto_shash_export(&desc.shash, &sha256)) + if (crypto_shash_export(shash, &sha256)) return -EFAULT; for (i = 0; i < digest_size >> 2; i++, hash_state_out++) *hash_state_out = cpu_to_be32(*(sha256.state + i)); break; case ICP_QAT_HW_AUTH_ALGO_SHA512: - if (crypto_shash_export(&desc.shash, &sha512)) + if (crypto_shash_export(shash, &sha512)) return -EFAULT; for (i = 0; i < digest_size >> 3; i++, hash512_state_out++) *hash512_state_out = cpu_to_be64(*(sha512.state + i)); -- 1.9.1