ACPI: Clean up inclusions of ACPI header files

Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and
<acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h>
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
<linux/acpi.h> includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that <acpi/acpi_bus.h> be included
prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the
latter depends on are always there.  And <acpi/acpi.h> which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
<linux/acpi.h> as appropriate.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

5 files changed, 1 insertions, 9 deletions

diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index ecfac7e..8dcccff 100644
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -31,12 +31,11 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <acpi/acpi_bus.h>
 #include <linux/sysfs.h>
 #include <linux/kobject.h>
-#include <asm/uaccess.h>
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
+#include <asm/uaccess.h>
 
 #include "acpiphp.h"
 #include "../pci.h"
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 21e865d..24e147c 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -163,8 +163,6 @@ static inline const char *slot_name(struct slot *slot)
 }
 
 #ifdef CONFIG_ACPI
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
 #include <linux/pci-acpi.h>
 
 void __init pciehp_acpi_slot_detection_init(void);
diff --git a/drivers/pci/ioapic.c b/drivers/pci/ioapic.c
index 50ce680..2122b2b 100644
--- a/drivers/pci/ioapic.c
+++ b/drivers/pci/ioapic.c
@@ -20,7 +20,6 @@
 #include <linux/module.h>
 #include <linux/acpi.h>
 #include <linux/slab.h>
-#include <acpi/acpi_bus.h>
 
 struct ioapic {
 	acpi_handle	handle;
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 577074e..43e3179 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -12,9 +12,6 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/pci-aspm.h>
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
-
 #include <linux/pci-acpi.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_qos.h>
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index d51f45a..dbafcc8 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -29,7 +29,6 @@
 #include <linux/nls.h>
 #include <linux/acpi.h>
 #include <linux/pci-acpi.h>
-#include <acpi/acpi_bus.h>
 #include "pci.h"
 
 #define	DEVICE_LABEL_DSM	0x07