Commit 25c38d3f authored by Huang Ying's avatar Huang Ying Committed by Herbert Xu

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: 's avatarHuang Ying <ying.huang@intel.com>
Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 6fe4a28d
......@@ -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
......
......@@ -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
......
/*
* 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");
#ifndef CRYPTO_WQ_H
#define CRYPTO_WQ_H
#include <linux/workqueue.h>
extern struct workqueue_struct *kcrypto_wq;
#endif
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