crypto: api - Add crypto_attr_alg2 helper

This patch adds the helper crypto_attr_alg2 which is similar to
crypto_attr_alg but takes an extra frontend argument.  This is
intended to be used by new style algorithm types such as shash.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 10 insertions, 1 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index c9bff92a9e0..1d15a926041 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -136,7 +136,16 @@ static inline void crypto_set_spawn(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);
 const char *crypto_attr_alg_name(struct rtattr *rta);
-struct crypto_alg *crypto_attr_alg(struct rtattr *rta, u32 type, u32 mask);
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+				    const struct crypto_type *frontend,
+				    u32 type, u32 mask);
+
+static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
+						 u32 type, u32 mask)
+{
+	return crypto_attr_alg2(rta, NULL, type, mask);
+}
+
 int crypto_attr_u32(struct rtattr *rta, u32 *num);
 void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
 			     unsigned int head);