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authorTejun Heo <tj@kernel.org>2010-06-29 12:07:09 +0400
committerTejun Heo <tj@kernel.org>2010-06-29 12:07:09 +0400
commit8fec62b2d9d0c80b594d0d85678bfdf57a70df1b (patch)
tree74dcc29170958b7ef29057e8e7e6e4a4cd059cdf /drivers/acpi/osl.c
parent82805ab77d25643f579d90397dcd34f05d1b750a (diff)
downloadlinux-8fec62b2d9d0c80b594d0d85678bfdf57a70df1b.tar.xz
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>
Diffstat (limited to 'drivers/acpi/osl.c')
-rw-r--r--drivers/acpi/osl.c40
1 files changed, 11 insertions, 29 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 78418ce4fc78..46cce391fa46 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -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