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acpi: use queue_work_on() instead of binding workqueue worker to cpu0 

ACPI works need to be executed on cpu0 and acpi/osl.c achieves this by
creating singlethread workqueue and then binding it to cpu0 from a
work which is quite unorthodox.  Make it create regular workqueues and
use queue_work_on() instead.  This is in preparation of concurrency
managed workqueue and the extra workers won't be a problem after it's
implemented.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2010-06-29 10:07:09 +02:00
parent 82805ab77d
commit 8fec62b2d9
1 changed files with 11 additions and 29 deletions
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40
drivers/acpi/osl.c
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@ -191,36 +191,11 @@ acpi_status __init acpi_os_initialize(void)
return AE_OK;
}
static void bind_to_cpu0(struct work_struct *work)
{
set_cpus_allowed_ptr(current, cpumask_of(0));
kfree(work);
}
static void bind_workqueue(struct workqueue_struct *wq)
{
struct work_struct *work;
work = kzalloc(sizeof(struct work_struct), GFP_KERNEL);
INIT_WORK(work, bind_to_cpu0);
queue_work(wq, work);
}
acpi_status acpi_os_initialize1(void)
{
/*
* On some machines, a software-initiated SMI causes corruption unless
* the SMI runs on CPU 0. An SMI can be initiated by any AML, but
* typically it's done in GPE-related methods that are run via
* workqueues, so we can avoid the known corruption cases by binding
* the workqueues to CPU 0.
*/
kacpid_wq = create_singlethread_workqueue("kacpid");
bind_workqueue(kacpid_wq);
kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
bind_workqueue(kacpi_notify_wq);
kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug");
bind_workqueue(kacpi_hotplug_wq);
kacpid_wq = create_workqueue("kacpid");
kacpi_notify_wq = create_workqueue("kacpi_notify");
kacpi_hotplug_wq = create_workqueue("kacpi_hotplug");
BUG_ON(!kacpid_wq);
BUG_ON(!kacpi_notify_wq);
BUG_ON(!kacpi_hotplug_wq);
@ -766,7 +741,14 @@ static acpi_status __acpi_os_execute(acpi_execute_type type,
else
INIT_WORK(&dpc->work, acpi_os_execute_deferred);
ret = queue_work(queue, &dpc->work);
/*
* On some machines, a software-initiated SMI causes corruption unless
* the SMI runs on CPU 0. An SMI can be initiated by any AML, but
* typically it's done in GPE-related methods that are run via
* workqueues, so we can avoid the known corruption cases by always
* queueing on CPU 0.
*/
ret = queue_work_on(0, queue, &dpc->work);
if (!ret) {
printk(KERN_ERR PREFIX