diff --git a/[refs] b/[refs]
index b5e46d3dd1e5..39e129660b5b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9ea7d57576f40c6af03c8c9fa7a069f2222b498b
+refs/heads/master: 6eedeef73e7fff32eb5fa25178c3c77b1db0ec0f
diff --git a/trunk/drivers/acpi/battery.c b/trunk/drivers/acpi/battery.c
index fc9c50ab5219..b5df318978ed 100644
--- a/trunk/drivers/acpi/battery.c
+++ b/trunk/drivers/acpi/battery.c
@@ -937,10 +937,8 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
 	case ACPI_BATTERY_NOTIFY_INFO:
 	case ACPI_NOTIFY_BUS_CHECK:
 	case ACPI_NOTIFY_DEVICE_CHECK:
-		acpi_battery_mutex_lock(battery);
 		device = battery->device;
 		acpi_battery_notify_update(battery);
-		acpi_battery_mutex_unlock(battery);
 		acpi_bus_generate_event(device, event,
 					acpi_battery_present(battery));
 		break;