crypto: authencesn - stop using alignmask of ahash

Now that the alignmask for ahash and shash algorithms is always 0,
simplify the code in authenc accordingly.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: ebiggers

crypto/authencesn.c

@@ -87,11 +87,8 @@ static int crypto_authenc_esn_genicv_tail(struct aead_request *req,
 					  unsigned int flags)
 {
 	struct crypto_aead *authenc_esn = crypto_aead_reqtfm(req);
-	struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
 	struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
-	struct crypto_ahash *auth = ctx->auth;
-	u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail,
-			     crypto_ahash_alignmask(auth) + 1);
+	u8 *hash = areq_ctx->tail;
 	unsigned int authsize = crypto_aead_authsize(authenc_esn);
 	unsigned int assoclen = req->assoclen;
 	unsigned int cryptlen = req->cryptlen;
@@ -122,8 +119,7 @@ static int crypto_authenc_esn_genicv(struct aead_request *req,
 	struct authenc_esn_request_ctx *areq_ctx = aead_request_ctx(req);
 	struct crypto_authenc_esn_ctx *ctx = crypto_aead_ctx(authenc_esn);
 	struct crypto_ahash *auth = ctx->auth;
-	u8 *hash = PTR_ALIGN((u8 *)areq_ctx->tail,
-			     crypto_ahash_alignmask(auth) + 1);
+	u8 *hash = areq_ctx->tail;
 	struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
 	unsigned int authsize = crypto_aead_authsize(authenc_esn);
 	unsigned int assoclen = req->assoclen;
@@ -224,8 +220,7 @@ static int crypto_authenc_esn_decrypt_tail(struct aead_request *req,
 	struct skcipher_request *skreq = (void *)(areq_ctx->tail +
 						  ctx->reqoff);
 	struct crypto_ahash *auth = ctx->auth;
-	u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail,
-			      crypto_ahash_alignmask(auth) + 1);
+	u8 *ohash = areq_ctx->tail;
 	unsigned int cryptlen = req->cryptlen - authsize;
 	unsigned int assoclen = req->assoclen;
 	struct scatterlist *dst = req->dst;
@@ -272,8 +267,7 @@ static int crypto_authenc_esn_decrypt(struct aead_request *req)
 	struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
 	unsigned int authsize = crypto_aead_authsize(authenc_esn);
 	struct crypto_ahash *auth = ctx->auth;
-	u8 *ohash = PTR_ALIGN((u8 *)areq_ctx->tail,
-			      crypto_ahash_alignmask(auth) + 1);
+	u8 *ohash = areq_ctx->tail;
 	unsigned int assoclen = req->assoclen;
 	unsigned int cryptlen = req->cryptlen;
 	u8 *ihash = ohash + crypto_ahash_digestsize(auth);
@@ -344,8 +338,7 @@ static int crypto_authenc_esn_init_tfm(struct crypto_aead *tfm)
 	ctx->enc = enc;
 	ctx->null = null;
 
-	ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth),
-			    crypto_ahash_alignmask(auth) + 1);
+	ctx->reqoff = 2 * crypto_ahash_digestsize(auth);
 
 	crypto_aead_set_reqsize(
 		tfm,
@@ -431,8 +424,7 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
 	inst->alg.base.cra_priority = enc->base.cra_priority * 10 +
 				      auth_base->cra_priority;
 	inst->alg.base.cra_blocksize = enc->base.cra_blocksize;
-	inst->alg.base.cra_alignmask = auth_base->cra_alignmask |
-				       enc->base.cra_alignmask;
+	inst->alg.base.cra_alignmask = enc->base.cra_alignmask;
 	inst->alg.base.cra_ctxsize = sizeof(struct crypto_authenc_esn_ctx);
 
 	inst->alg.ivsize = enc->ivsize;