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crypto: api - Introduce notifier for new crypto algorithms

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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 <[email protected]>
Suggested-by: Herbert Xu <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Martin K. Petersen 2018-08-30 11:00:14 -04:00 • committed by Herbert Xu
commit dd8b083f9a
4 changed files with 14 additions and 8 deletions
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2
crypto/algapi.c
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@ -372,6 +372,8 @@ static void crypto_wait_for_test(struct crypto_larval *larval)
err = wait_for_completion_killable(&larval->completion);
WARN_ON(err);
if (!err)
crypto_probing_notify(CRYPTO_MSG_ALG_LOADED, larval);
out:
crypto_larval_kill(&larval->alg);