diff options
Diffstat (limited to 'drivers/acpi/osl.c')
-rw-r--r-- | drivers/acpi/osl.c | 25 |
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 | ||
192 | static void bind_to_cpu0(struct work_struct *work) | ||
193 | { | ||
194 | set_cpus_allowed(current, cpumask_of_cpu(0)); | ||
195 | kfree(work); | ||
196 | } | ||
197 | |||
198 | static 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 | |||
192 | acpi_status acpi_os_initialize1(void) | 207 | acpi_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); |