crypto: api - Use dedicated workqueue for crypto subsystem

Use dedicated workqueue for crypto subsystem

A dedicated workqueue named kcrypto_wq is created to be used by crypto
subsystem. The system shared keventd_wq is not suitable for
encryption/decryption, because of potential starvation problem.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index a83ce0462b6b..420b630a17cf 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -106,6 +106,9 @@ config CRYPTO_NULL
         help
           These are 'Null' algorithms, used by IPsec, which do nothing.
 
+config CRYPTO_WORKQUEUE
+       tristate
+
 config CRYPTO_CRYPTD
         tristate "Software async crypto daemon"
         select CRYPTO_BLKCIPHER