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-rw-r--r--drivers/acpi/osl.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 71670719d61a..5691f165a952 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -189,11 +189,36 @@ acpi_status __init acpi_os_initialize(void)
189 return AE_OK; 189 return AE_OK;
190} 190}
191 191
192static void bind_to_cpu0(struct work_struct *work)
193{
194 set_cpus_allowed(current, cpumask_of_cpu(0));
195 kfree(work);
196}
197
198static void bind_workqueue(struct workqueue_struct *wq)
199{
200 struct work_struct *work;
201
202 work = kzalloc(sizeof(struct work_struct), GFP_KERNEL);
203 INIT_WORK(work, bind_to_cpu0);
204 queue_work(wq, work);
205}
206
192acpi_status acpi_os_initialize1(void) 207acpi_status acpi_os_initialize1(void)
193{ 208{
209 /*
210 * On some machines, a software-initiated SMI causes corruption unless
211 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
212 * typically it's done in GPE-related methods that are run via
213 * workqueues, so we can avoid the known corruption cases by binding
214 * the workqueues to CPU 0.
215 */
194 kacpid_wq = create_singlethread_workqueue("kacpid"); 216 kacpid_wq = create_singlethread_workqueue("kacpid");
217 bind_workqueue(kacpid_wq);
195 kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); 218 kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
219 bind_workqueue(kacpi_notify_wq);
196 kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); 220 kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug");
221 bind_workqueue(kacpi_hotplug_wq);
197 BUG_ON(!kacpid_wq); 222 BUG_ON(!kacpid_wq);
198 BUG_ON(!kacpi_notify_wq); 223 BUG_ON(!kacpi_notify_wq);
199 BUG_ON(!kacpi_hotplug_wq); 224 BUG_ON(!kacpi_hotplug_wq);