[CRYPTO] api: Add crypto_comp and crypto_has_*

This patch adds the crypto_comp type to complete the compile-time checking
conversion.  The functions crypto_has_alg and crypto_has_cipher, etc. are
also added to replace crypto_alg_available.

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

1 files changed, 14 insertions, 0 deletions

diff --git a/crypto/api.c b/crypto/api.c
index edaa843d8e83..2e84d4b54790 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -482,3 +482,17 @@ int crypto_alg_available(const char *name, u32 flags)
 EXPORT_SYMBOL_GPL(crypto_alloc_tfm);
 EXPORT_SYMBOL_GPL(crypto_free_tfm);
 EXPORT_SYMBOL_GPL(crypto_alg_available);
+
+int crypto_has_alg(const char *name, u32 type, u32 mask)
+{
+	int ret = 0;
+	struct crypto_alg *alg = crypto_alg_mod_lookup(name, type, mask);
+	
+	if (!IS_ERR(alg)) {
+		crypto_mod_put(alg);
+		ret = 1;
+	}
+	
+	return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_has_alg);