[CRYPTO] api: Added asynchronous flag

This patch adds the asynchronous flag and changes all existing users to
only look up algorithms that are synchronous.

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

2 files changed, 4 insertions, 2 deletions

diff --git a/crypto/api.c b/crypto/api.c
index 7e5522cf856e..1e4692a13474 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -355,7 +355,7 @@ struct crypto_tfm *crypto_alloc_tfm(const char *name, u32 flags)
         do {
                 struct crypto_alg *alg;
 
-                alg = crypto_alg_mod_lookup(name, 0, 0);
+                alg = crypto_alg_mod_lookup(name, 0, CRYPTO_ALG_ASYNC);
                 err = PTR_ERR(alg);
                 if (IS_ERR(alg))
                         continue;
@@ -394,7 +394,8 @@ void crypto_free_tfm(struct crypto_tfm *tfm)
 int crypto_alg_available(const char *name, u32 flags)
 {
         int ret = 0;
-        struct crypto_alg *alg = crypto_alg_mod_lookup(name, 0, 0);
+        struct crypto_alg *alg = crypto_alg_mod_lookup(name, 0,
+                                                       CRYPTO_ALG_ASYNC);
         
         if (!IS_ERR(alg)) {
                 crypto_mod_put(alg);
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index dbdfc7c79367..530dc4bf363c 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -37,6 +37,7 @@
 #define CRYPTO_ALG_LARVAL               0x00000010
 #define CRYPTO_ALG_DEAD                 0x00000020
 #define CRYPTO_ALG_DYING                0x00000040
+#define CRYPTO_ALG_ASYNC                0x00000080
 
 /*
  * Transform masks and values (for crt_flags).