diff options
| author | Huang Ying <ying.huang@intel.com> | 2009-02-19 14:33:40 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-02-19 14:33:40 +0800 |
| commit | 25c38d3fb92fc23af7730a1601bc20af8216ae44 (patch) | |
| tree | c191112a61457ecbf69d1a477705c87678a44231 | |
| parent | 6fe4a28d8855e072036f36ee22f0a8f43f44918f (diff) | |
| download | linux-25c38d3fb92fc23af7730a1601bc20af8216ae44.tar.bz2 | |
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>
| -rw-r--r-- | crypto/Kconfig | 3 | ||||
| -rw-r--r-- | crypto/Makefile | 2 | ||||
| -rw-r--r-- | crypto/crypto_wq.c | 38 | ||||
| -rw-r--r-- | include/crypto/crypto_wq.h | 7 |
4 files changed, 50 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 diff --git a/crypto/Makefile b/crypto/Makefile index 46b08bf2035f..e05a844e08d5 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -5,6 +5,8 @@ obj-$(CONFIG_CRYPTO) += crypto.o crypto-objs := api.o cipher.o digest.o compress.o +obj-$(CONFIG_CRYPTO_WORKQUEUE) += crypto_wq.o + obj-$(CONFIG_CRYPTO_FIPS) += fips.o crypto_algapi-$(CONFIG_PROC_FS) += proc.o diff --git a/crypto/crypto_wq.c b/crypto/crypto_wq.c new file mode 100644 index 000000000000..fdcf6248f152 --- /dev/null +++ b/crypto/crypto_wq.c @@ -0,0 +1,38 @@ +/* + * Workqueue for crypto subsystem + * + * Copyright (c) 2009 Intel Corp. + * Author: Huang Ying <ying.huang@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#include <linux/workqueue.h> +#include <crypto/algapi.h> +#include <crypto/crypto_wq.h> + +struct workqueue_struct *kcrypto_wq; +EXPORT_SYMBOL_GPL(kcrypto_wq); + +static int __init crypto_wq_init(void) +{ + kcrypto_wq = create_workqueue("crypto"); + if (unlikely(!kcrypto_wq)) + return -ENOMEM; + return 0; +} + +static void __exit crypto_wq_exit(void) +{ + destroy_workqueue(kcrypto_wq); +} + +module_init(crypto_wq_init); +module_exit(crypto_wq_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Workqueue for crypto subsystem"); diff --git a/include/crypto/crypto_wq.h b/include/crypto/crypto_wq.h new file mode 100644 index 000000000000..a7d252daf91b --- /dev/null +++ b/include/crypto/crypto_wq.h @@ -0,0 +1,7 @@ +#ifndef CRYPTO_WQ_H +#define CRYPTO_WQ_H + +#include <linux/workqueue.h> + +extern struct workqueue_struct *kcrypto_wq; +#endif |