crypto: api - Introduce notifier for new crypto algorithms

Introduce a facility that can be used to receive a notification
callback when a new algorithm becomes available. This can be used by
existing crypto registrations to trigger a switch from a software-only
algorithm to a hardware-accelerated version.

A new CRYPTO_MSG_ALG_LOADED state is introduced to the existing crypto
notification chain, and the register/unregister functions are exported
so they can be called by subsystems outside of crypto.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Suggested-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 0 insertions, 8 deletions

diff --git a/crypto/internal.h b/crypto/internal.h
index 9a3f39939fba..ef769b5e8ad3 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -26,12 +26,6 @@
 #include <linux/rwsem.h>
 #include <linux/slab.h>
 
-/* Crypto notification events. */
-enum {
-	CRYPTO_MSG_ALG_REQUEST,
-	CRYPTO_MSG_ALG_REGISTER,
-};
-
 struct crypto_instance;
 struct crypto_template;
 
@@ -90,8 +84,6 @@ struct crypto_alg *crypto_find_alg(const char *alg_name,
 void *crypto_alloc_tfm(const char *alg_name,
 		       const struct crypto_type *frontend, u32 type, u32 mask);
 
-int crypto_register_notifier(struct notifier_block *nb);
-int crypto_unregister_notifier(struct notifier_block *nb);
 int crypto_probing_notify(unsigned long val, void *v);
 
 unsigned int crypto_alg_extsize(struct crypto_alg *alg);