diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index b130ea0d0759..13b611e7eade 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -14,48 +14,52 @@ obj-$(CONFIG_X86)		+= blacklist.o
 #
 # ACPI Core Subsystem (Interpreter)
 #
-obj-y				+= osl.o utils.o reboot.o\
+obj-y				+= acpi.o \
 					acpica/
 
+# All the builtin files are in the "acpi." module_param namespace.
+acpi-y				+= osl.o utils.o reboot.o
+
 # sleep related files
-obj-y				+= wakeup.o
-obj-y				+= sleep.o
-obj-$(CONFIG_ACPI_SLEEP)	+= proc.o
+acpi-y				+= wakeup.o
+acpi-y				+= sleep.o
+acpi-$(CONFIG_ACPI_SLEEP)	+= proc.o
 
 
 #
 # ACPI Bus and Device Drivers
 #
+acpi-y				+= bus.o glue.o
+acpi-y				+= scan.o
+# Keep EC driver first. Initialization of others depend on it.
+acpi-y				+= ec.o
+acpi-$(CONFIG_ACPI_DOCK)	+= dock.o
+acpi-y				+= pci_root.o pci_link.o pci_irq.o pci_bind.o
+acpi-y				+= power.o
+acpi-y				+= system.o event.o
+acpi-$(CONFIG_ACPI_DEBUG)	+= debug.o
+acpi-$(CONFIG_ACPI_NUMA)	+= numa.o
+acpi-$(CONFIG_ACPI_PROCFS_POWER) += cm_sbs.o
+ifdef CONFIG_ACPI_VIDEO
+acpi-y				+= video_detect.o
+endif
+
+# These are (potentially) separate modules
+obj-$(CONFIG_ACPI_AC) 		+= ac.o
+obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
+obj-$(CONFIG_ACPI_BUTTON)	+= button.o
+obj-$(CONFIG_ACPI_FAN)		+= fan.o
+obj-$(CONFIG_ACPI_VIDEO)	+= video.o
+obj-$(CONFIG_ACPI_PCI_SLOT)	+= pci_slot.o
+obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
+obj-$(CONFIG_ACPI_CONTAINER)	+= container.o
+obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
+obj-$(CONFIG_ACPI_HOTPLUG_MEMORY) += acpi_memhotplug.o
+obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
+obj-$(CONFIG_ACPI_SBS)		+= sbs.o
+
 processor-objs	+= processor_core.o processor_throttling.o \
 				processor_idle.o processor_thermal.o
 ifdef CONFIG_CPU_FREQ
 processor-objs	+= processor_perflib.o
 endif
-
-obj-y				+= bus.o glue.o
-obj-y				+= scan.o
-# Keep EC driver first. Initialization of others depend on it.
-obj-y				+= ec.o
-obj-$(CONFIG_ACPI_AC) 		+= ac.o
-obj-$(CONFIG_ACPI_BATTERY)	+= battery.o
-obj-$(CONFIG_ACPI_BUTTON)	+= button.o
-obj-$(CONFIG_ACPI_FAN)		+= fan.o
-obj-$(CONFIG_ACPI_DOCK)		+= dock.o
-obj-$(CONFIG_ACPI_VIDEO)	+= video.o
-ifdef CONFIG_ACPI_VIDEO
-obj-y				+= video_detect.o
-endif
-
-obj-y				+= pci_root.o pci_link.o pci_irq.o pci_bind.o
-obj-$(CONFIG_ACPI_PCI_SLOT)	+= pci_slot.o
-obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
-obj-$(CONFIG_ACPI_CONTAINER)	+= container.o
-obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
-obj-y				+= power.o
-obj-y				+= system.o event.o
-obj-$(CONFIG_ACPI_DEBUG)	+= debug.o
-obj-$(CONFIG_ACPI_NUMA)		+= numa.o
-obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)	+= acpi_memhotplug.o
-obj-$(CONFIG_ACPI_PROCFS_POWER)	+= cm_sbs.o
-obj-$(CONFIG_ACPI_SBS)		+= sbshc.o
-obj-$(CONFIG_ACPI_SBS)		+= sbs.o
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index 20223cbd0d1c..25f9c38531bd 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -13,11 +13,6 @@
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("debug");
 
-#ifdef MODULE_PARAM_PREFIX
-#undef MODULE_PARAM_PREFIX
-#endif
-#define MODULE_PARAM_PREFIX "acpi."
-
 struct acpi_dlayer {
 	const char *name;
 	unsigned long value;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index c926e7d4a0d6..87361c1592d3 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -54,10 +54,6 @@ ACPI_MODULE_NAME("power");
 #define ACPI_POWER_RESOURCE_STATE_ON	0x01
 #define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
 
-#ifdef MODULE_PARAM_PREFIX
-#undef MODULE_PARAM_PREFIX
-#endif
-#define MODULE_PARAM_PREFIX "acpi."
 int acpi_power_nocheck;
 module_param_named(power_nocheck, acpi_power_nocheck, bool, 000);
 
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 391d0358a592..a0499d00020c 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -33,10 +33,6 @@
 
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("system");
-#ifdef MODULE_PARAM_PREFIX
-#undef MODULE_PARAM_PREFIX
-#endif
-#define MODULE_PARAM_PREFIX "acpi."
 
 #define ACPI_SYSTEM_CLASS		"system"
 #define ACPI_SYSTEM_DEVICE_NAME		"System"