diff --git a/[refs] b/[refs]
index da157304dea8..74ee9cbf6b52 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d30dc9abb4aacfd4df3f486f22bcbc0531b73283
+refs/heads/master: 2d571b33cf7efd6a894e765e3cb45587ec5b834a
diff --git a/trunk/drivers/acpi/hardware/hwsleep.c b/trunk/drivers/acpi/hardware/hwsleep.c
index 4d0c677fac19..c0577ca55358 100644
--- a/trunk/drivers/acpi/hardware/hwsleep.c
+++ b/trunk/drivers/acpi/hardware/hwsleep.c
@@ -398,7 +398,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 	/* Wait until we enter sleep state */
 
 	do {
-		status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
+		status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS,
+						    &in_value);
 		if (ACPI_FAILURE(status)) {
 			return_ACPI_STATUS(status);
 		}
diff --git a/trunk/include/acpi/acpixf.h b/trunk/include/acpi/acpixf.h
index 3d7ab9e0c9fe..9512f0456ad1 100644
--- a/trunk/include/acpi/acpixf.h
+++ b/trunk/include/acpi/acpixf.h
@@ -314,6 +314,8 @@ acpi_resource_to_address64(struct acpi_resource *resource,
  */
 acpi_status acpi_get_register(u32 register_id, u32 * return_value);
 
+acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value);
+
 acpi_status acpi_set_register(u32 register_id, u32 value);
 
 acpi_status