crypto: api - remove CRYPTOA_U32 and related functions

According to the advice of Eric and Herbert, type CRYPTOA_U32
has been unused for over a decade, so remove the code related to
CRYPTOA_U32.

After removing CRYPTOA_U32, the type of the variable attrs can be
changed from union to struct.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/algapi.c

@@ -868,24 +868,6 @@ const char *crypto_attr_alg_name(struct rtattr *rta)
 }
 EXPORT_SYMBOL_GPL(crypto_attr_alg_name);
 
-int crypto_attr_u32(struct rtattr *rta, u32 *num)
-{
-	struct crypto_attr_u32 *nu32;
-
-	if (!rta)
-		return -ENOENT;
-	if (RTA_PAYLOAD(rta) < sizeof(*nu32))
-		return -EINVAL;
-	if (rta->rta_type != CRYPTOA_U32)
-		return -EINVAL;
-
-	nu32 = RTA_DATA(rta);
-	*num = nu32->num;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(crypto_attr_u32);
-
 int crypto_inst_setname(struct crypto_instance *inst, const char *name,
 			struct crypto_alg *alg)
 {

crypto/algboss.c

@@ -28,16 +28,9 @@ struct cryptomgr_param {
 		struct crypto_attr_type data;
 	} type;
 
-	union {
+	struct {
 		struct rtattr attr;
-		struct {
+		struct crypto_attr_alg data;
-			struct rtattr attr;
-			struct crypto_attr_alg data;
-		} alg;
-		struct {
-			struct rtattr attr;
-			struct crypto_attr_u32 data;
-		} nu32;
 	} attrs[CRYPTO_MAX_ATTRS];
 
 	char template[CRYPTO_MAX_ALG_NAME];
@@ -104,12 +97,10 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
 
 	i = 0;
 	for (;;) {
-		int notnum = 0;
-
 		name = ++p;
 
 		for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
-			notnum |= !isdigit(*p);
+			;
 
 		if (*p == '(') {
 			int recursion = 0;
@@ -123,7 +114,6 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
 					break;
 			}
 
-			notnum = 1;
 			p++;
 		}
 
@@ -131,18 +121,9 @@ static int cryptomgr_schedule_probe(struct crypto_larval *larval)
 		if (!len)
 			goto err_free_param;
 
-		if (notnum) {
+		param->attrs[i].attr.rta_len = sizeof(param->attrs[i]);
-			param->attrs[i].alg.attr.rta_len =
+		param->attrs[i].attr.rta_type = CRYPTOA_ALG;
-				sizeof(param->attrs[i].alg);
+		memcpy(param->attrs[i].data.name, name, len);
-			param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
-			memcpy(param->attrs[i].alg.data.name, name, len);
-		} else {
-			param->attrs[i].nu32.attr.rta_len =
-				sizeof(param->attrs[i].nu32);
-			param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
-			param->attrs[i].nu32.data.num =
-				simple_strtol(name, NULL, 0);
-		}
 
 		param->tb[i + 1] = &param->attrs[i].attr;
 		i++;

include/crypto/algapi.h

@@ -118,7 +118,6 @@ void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
 struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
 int crypto_check_attr_type(struct rtattr **tb, u32 type, u32 *mask_ret);
 const char *crypto_attr_alg_name(struct rtattr *rta);
-int crypto_attr_u32(struct rtattr *rta, u32 *num);
 int crypto_inst_setname(struct crypto_instance *inst, const char *name,
 			struct crypto_alg *alg);
 

include/linux/crypto.h

@@ -647,7 +647,6 @@ enum {
 	CRYPTOA_UNSPEC,
 	CRYPTOA_ALG,
 	CRYPTOA_TYPE,
-	CRYPTOA_U32,
 	__CRYPTOA_MAX,
 };
 
@@ -665,10 +664,6 @@ struct crypto_attr_type {
 	u32 mask;
 };
 
-struct crypto_attr_u32 {
-	u32 num;
-};
-
 /* 
  * Transform user interface.
  */