2 files changed, 17 insertions, 15 deletions

diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index cf0817a555e4..cac0dfb2a082 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -461,8 +461,6 @@ acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
                                  acpi_notify_handler handler, void *context);
 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
                                     acpi_notify_handler handler);
-int acpi_device_power_state(struct device *dev, struct acpi_device *adev,
-                            u32 target_state, int d_max_in, int *d_min_p);
 int acpi_pm_device_sleep_state(struct device *, int *, int);
 void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev);
 void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev);
@@ -478,23 +476,13 @@ static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
 {
         return AE_SUPPORT;
 }
-static inline int __acpi_device_power_state(int m, int *p)
+static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 {
         if (p)
                 *p = ACPI_STATE_D0;
+
         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0;
 }
-static inline int acpi_device_power_state(struct device *dev,
-                                          struct acpi_device *adev,
-                                          u32 target_state, int d_max_in,
-                                          int *d_min_p)
-{
-        return __acpi_device_power_state(d_max_in, d_min_p);
-}
-static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
-{
-        return __acpi_device_power_state(m, p);
-}
 static inline void acpi_dev_pm_add_dependent(acpi_handle handle,
                                              struct device *depdev) {}
 static inline void acpi_dev_pm_remove_dependent(acpi_handle handle,
diff --git a/include/xen/acpi.h b/include/xen/acpi.h
index 68d73d09b770..46aa3d1c1654 100644
--- a/include/xen/acpi.h
+++ b/include/xen/acpi.h
@@ -78,11 +78,25 @@ static inline int xen_acpi_get_pxm(acpi_handle h)
 int xen_acpi_notify_hypervisor_state(u8 sleep_state,
                                      u32 pm1a_cnt, u32 pm1b_cnd);
 
+static inline int xen_acpi_suspend_lowlevel(void)
+{
+        /*
+        * Xen will save and restore CPU context, so
+        * we can skip that and just go straight to
+        * the suspend.
+        */
+        acpi_enter_sleep_state(ACPI_STATE_S3);
+        return 0;
+}
+
 static inline void xen_acpi_sleep_register(void)
 {
-        if (xen_initial_domain())
+        if (xen_initial_domain()) {
                 acpi_os_set_prepare_sleep(
                         &xen_acpi_notify_hypervisor_state);
+
+                acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
+        }
 }
 #else
 static inline void xen_acpi_sleep_register(void)