diff --git a/drivers/acpi/motherboard.c b/drivers/acpi/motherboard.c
index ec6b7f9ede34..2e17ec75af03 100644
--- a/drivers/acpi/motherboard.c
+++ b/drivers/acpi/motherboard.c
@@ -48,6 +48,12 @@ ACPI_MODULE_NAME("acpi_motherboard")
  * the io ports if they really know they can use it, while
  * still preventing hotplug PCI devices from using it.
  */
+
+/*
+ * When CONFIG_PNP is enabled, pnp/system.c binds to PNP0C01
+ * and PNP0C02, redundant with acpi_reserve_io_ranges().
+ * But acpi_reserve_io_ranges() is necessary for !CONFIG_PNP.
+ */
 static acpi_status acpi_reserve_io_ranges(struct acpi_resource *res, void *data)
 {
 	struct resource *requested_res = NULL;
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 7f3e7e77e794..d53bd9878ca2 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -307,7 +307,7 @@ static int acpi_pci_link_set(struct acpi_pci_link *link, int irq)
 	if (!link || !irq)
 		return -EINVAL;
 
-	resource = kmalloc(sizeof(*resource) + 1, GFP_ATOMIC);
+	resource = kmalloc(sizeof(*resource) + 1, irqs_disabled() ? GFP_ATOMIC: GFP_KERNEL);
 	if (!resource)
 		return -ENOMEM;
 
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index fec225d1b6b7..fe67a8af520e 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -216,10 +216,8 @@ static int acpi_power_off_device(acpi_handle handle)
 {
 	int result = 0;
 	acpi_status status = AE_OK;
-	struct acpi_device *device = NULL;
 	struct acpi_power_resource *resource = NULL;
 
-
 	result = acpi_power_get_context(handle, &resource);
 	if (result)
 		return result;
@@ -230,13 +228,13 @@ static int acpi_power_off_device(acpi_handle handle)
 	if (resource->references) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 				  "Resource [%s] is still in use, dereferencing\n",
-				  device->pnp.bus_id));
+				  resource->device->pnp.bus_id));
 		return 0;
 	}
 
 	if (resource->state == ACPI_POWER_RESOURCE_STATE_OFF) {
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] already off\n",
-				  device->pnp.bus_id));
+				  resource->device->pnp.bus_id));
 		return 0;
 	}
 
@@ -251,8 +249,7 @@ static int acpi_power_off_device(acpi_handle handle)
 		return -ENOEXEC;
 
 	/* Update the power resource's _device_ power state */
-	device = resource->device;
-	device->power.state = ACPI_STATE_D3;
+	resource->device->power.state = ACPI_STATE_D3;
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] turned off\n",
 			  resource->name));
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index b13d64415b7a..1908e0d20222 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -519,7 +519,7 @@ static int acpi_processor_get_info(struct acpi_processor *pr)
 
 static void *processor_device_array[NR_CPUS];
 
-static int acpi_processor_start(struct acpi_device *device)
+static int __cpuinit acpi_processor_start(struct acpi_device *device)
 {
 	int result = 0;
 	acpi_status status = AE_OK;
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 429a39dbd75d..526387dc3799 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1130,7 +1130,7 @@ static struct notifier_block acpi_processor_latency_notifier = {
 	.notifier_call = acpi_processor_latency_notify,
 };
 
-int acpi_processor_power_init(struct acpi_processor *pr,
+int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
 			      struct acpi_device *device)
 {
 	acpi_status status = 0;
diff --git a/drivers/acpi/tables/tbget.c b/drivers/acpi/tables/tbget.c
index 7856db759af0..11e2d4454e05 100644
--- a/drivers/acpi/tables/tbget.c
+++ b/drivers/acpi/tables/tbget.c
@@ -324,7 +324,7 @@ acpi_tb_get_this_table(struct acpi_pointer *address,
 
 	if (header->length < sizeof(struct acpi_table_header)) {
 		ACPI_ERROR((AE_INFO,
-			    "Table length (%X) is smaller than minimum (%X)",
+			    "Table length (%X) is smaller than minimum (%zX)",
 			    header->length, sizeof(struct acpi_table_header)));
 
 		return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c
index 0ad3dbb9ebca..86a5fca9b739 100644
--- a/drivers/acpi/tables/tbrsdt.c
+++ b/drivers/acpi/tables/tbrsdt.c
@@ -187,7 +187,7 @@ acpi_status acpi_tb_validate_rsdt(struct acpi_table_header *table_ptr)
 
 	if (table_ptr->length < sizeof(struct acpi_table_header)) {
 		ACPI_ERROR((AE_INFO,
-			    "RSDT/XSDT length (%X) is smaller than minimum (%X)",
+			    "RSDT/XSDT length (%X) is smaller than minimum (%zX)",
 			    table_ptr->length,
 			    sizeof(struct acpi_table_header)));