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drivers/edac: mod MC to use workq instead of kthread

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Move the memory controller object to work queue based implementation from the
kernel thread based.

Signed-off-by: Dave Jiang <djiang@mvista.com>
Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Jiang
2007-07-19 01:49:52 -07:00
committed by Linus Torvalds
parent 535c6a5303
commit 81d87cb13e
6 changed files with 177 additions and 97 deletions
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86
drivers/edac/edac_module.c
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@@ -1,6 +1,14 @@
#include <linux/freezer.h>
#include <linux/kthread.h>
/*
* edac_module.c
*
* (C) 2007 www.douglaskthompson.com
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
* Author: Doug Thompson <norsk5@xmission.com>
*
*/
#include <linux/edac.h>
#include "edac_core.h"
@@ -17,10 +25,6 @@ EXPORT_SYMBOL_GPL(edac_debug_level);
/* scope is to module level only */
struct workqueue_struct *edac_workqueue;
/* private to this file */
static struct task_struct *edac_thread;
/*
* sysfs object: /sys/devices/system/edac
* need to export to other files in this modules
@@ -84,63 +88,6 @@ static void edac_unregister_sysfs_edac_name(void)
edac_class_valid = 0;
}
/*
* Check MC status every edac_get_poll_msec().
* Check PCI status every edac_get_poll_msec() as well.
*
* This where the work gets done for edac.
*
* SMP safe, doesn't use NMI, and auto-rate-limits.
*/
static void do_edac_check(void)
{
debugf3("%s()\n", __func__);
/* perform the poll activities */
edac_check_mc_devices();
edac_pci_do_parity_check();
}
/*
* handler for EDAC to check if NMI type handler has asserted interrupt
*/
static int edac_assert_error_check_and_clear(void)
{
int vreg;
if(edac_op_state == EDAC_OPSTATE_POLL)
return 1;
vreg = atomic_read(&edac_err_assert);
if(vreg) {
atomic_set(&edac_err_assert, 0);
return 1;
}
return 0;
}
/*
* Action thread for EDAC to perform the POLL operations
*/
static int edac_kernel_thread(void *arg)
{
int msec;
while (!kthread_should_stop()) {
if(edac_assert_error_check_and_clear())
do_edac_check();
/* goto sleep for the interval */
msec = (HZ * edac_get_poll_msec()) / 1000;
schedule_timeout_interruptible(msec);
try_to_freeze();
}
return 0;
}
/*
* edac_workqueue_setup
* initialize the edac work queue for polling operations
@@ -221,19 +168,9 @@ static int __init edac_init(void)
goto error_pci;
}
/* create our kernel thread */
edac_thread = kthread_run(edac_kernel_thread, NULL, "kedac");
if (IS_ERR(edac_thread)) {
err = PTR_ERR(edac_thread);
goto error_work;
}
return 0;
/* Error teardown stack */
error_work:
edac_workqueue_teardown();
error_pci:
edac_sysfs_pci_teardown();
error_mem:
@@ -251,7 +188,6 @@ error:
static void __exit edac_exit(void)
{
debugf0("%s()\n", __func__);
kthread_stop(edac_thread);
/* tear down the various subsystems*/
edac_workqueue_teardown();