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-rw-r--r--drivers/acpi/processor_core.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index e944aaee4e06..2afb3d2086b3 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -724,6 +724,25 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
return;
}
+static int acpi_cpu_soft_notify(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned long)hcpu;
+ struct acpi_processor *pr = processors[cpu];
+
+ if (action == CPU_ONLINE && pr) {
+ acpi_processor_ppc_has_changed(pr);
+ acpi_processor_cst_has_changed(pr);
+ acpi_processor_tstate_has_changed(pr);
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block acpi_cpu_notifier =
+{
+ .notifier_call = acpi_cpu_soft_notify,
+};
+
static int acpi_processor_add(struct acpi_device *device)
{
struct acpi_processor *pr = NULL;
@@ -987,6 +1006,7 @@ void acpi_processor_install_hotplug_notify(void)
ACPI_UINT32_MAX,
processor_walk_namespace_cb, &action, NULL);
#endif
+ register_hotcpu_notifier(&acpi_cpu_notifier);
}
static
@@ -999,6 +1019,7 @@ void acpi_processor_uninstall_hotplug_notify(void)
ACPI_UINT32_MAX,
processor_walk_namespace_cb, &action, NULL);
#endif
+ unregister_hotcpu_notifier(&acpi_cpu_notifier);
}
/*