Merge branch 'acpi-headers'

* acpi-headers:
  ACPI: Add support to force header inclusion rules for <acpi/acpi.h>.
  ACPI / SFI: Fix wrong <acpi/acpi.h> inclusion in SFI/ACPI wrapper - table definitions.
  ACPICA: Linux: Allow ACPICA inclusion for CONFIG_ACPI=n builds.
  ACPICA: Linux: Add support to exclude <asm/acenv.h> inclusion.
  ACPICA: Linux: Add stub implementation of ACPICA 64-bit mathematics.
  ACPICA: Linux: Add stub support for Linux specific variables and functions.

arch/ia64/include/asm/acenv.h

@@ -19,8 +19,6 @@
 
 /* Asm macros */
 
-#ifdef CONFIG_ACPI
-
 static inline int
 ia64_acpi_acquire_global_lock(unsigned int *lock)
 {
@@ -51,6 +49,4 @@ ia64_acpi_release_global_lock(unsigned int *lock)
 #define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq)				\
 	((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
 
-#endif
-
 #endif /* _ASM_IA64_ACENV_H */

arch/x86/include/asm/acenv.h

@@ -18,8 +18,6 @@
 
 #define ACPI_FLUSH_CPU_CACHE()	wbinvd()
 
-#ifdef CONFIG_ACPI
-
 int __acpi_acquire_global_lock(unsigned int *lock);
 int __acpi_release_global_lock(unsigned int *lock);
 
@@ -44,6 +42,4 @@ int __acpi_release_global_lock(unsigned int *lock);
 	    : "=r"(n_hi), "=r"(n_lo)	\
 	    : "0"(n_hi), "1"(n_lo))
 
-#endif
-
 #endif /* _ASM_X86_ACENV_H */

drivers/acpi/acpica/Makefile

@@ -2,7 +2,7 @@
 # Makefile for ACPICA Core interpreter
 #
 
-ccflags-y			:= -Os
+ccflags-y			:= -Os -DBUILDING_ACPICA
 ccflags-$(CONFIG_ACPI_DEBUG)	+= -DACPI_DEBUG_OUTPUT
 
 # use acpi.o to put all files here into acpi.o modparam namespace

drivers/acpi/bus.c

@@ -477,9 +477,6 @@ static int __init acpi_bus_init_irq(void)
 	return 0;
 }
 
-u8 acpi_gbl_permanent_mmap;
-
-
 void __init acpi_early_init(void)
 {
 	acpi_status status;

include/acpi/acpixf.h

@@ -53,8 +53,6 @@
 #include <acpi/actbl.h>
 #include <acpi/acbuffer.h>
 
-extern u8 acpi_gbl_permanent_mmap;
-
 /*****************************************************************************
  *
  * Macros used for ACPICA globals and configuration
@@ -889,17 +887,25 @@ ACPI_APP_DEPENDENT_RETURN_VOID(ACPI_PRINTF_LIKE(1)
 /*
  * Divergences
  */
-acpi_status acpi_get_id(acpi_handle object, acpi_owner_id * out_type);
+ACPI_GLOBAL(u8, acpi_gbl_permanent_mmap);
+
+ACPI_EXTERNAL_RETURN_STATUS(acpi_status
+			    acpi_get_id(acpi_handle object,
+					acpi_owner_id * out_type))
 
-acpi_status acpi_unload_table_id(acpi_owner_id id);
+ACPI_EXTERNAL_RETURN_STATUS(acpi_status acpi_unload_table_id(acpi_owner_id id))
 
-acpi_status
-acpi_get_table_with_size(acpi_string signature,
-	       u32 instance, struct acpi_table_header **out_table,
-	       acpi_size *tbl_size);
+ACPI_EXTERNAL_RETURN_STATUS(acpi_status
+			    acpi_get_table_with_size(acpi_string signature,
+						     u32 instance,
+						     struct acpi_table_header
+						     **out_table,
+						     acpi_size *tbl_size))
 
-acpi_status
-acpi_get_data_full(acpi_handle object, acpi_object_handler handler, void **data,
-		   void (*callback)(void *));
+ACPI_EXTERNAL_RETURN_STATUS(acpi_status
+			    acpi_get_data_full(acpi_handle object,
+					       acpi_object_handler handler,
+					       void **data,
+					       void (*callback)(void *)))
 
 #endif				/* __ACXFACE_H__ */

include/acpi/platform/aclinux.h

@@ -44,6 +44,16 @@
 #ifndef __ACLINUX_H__
 #define __ACLINUX_H__
 
+#ifdef __KERNEL__
+
+/* ACPICA external files should not include ACPICA headers directly. */
+
+#if !defined(BUILDING_ACPICA) && !defined(_LINUX_ACPI_H)
+#error "Please don't include <acpi/acpi.h> directly, include <linux/acpi.h> instead."
+#endif
+
+#endif
+
 /* Common (in-kernel/user-space) ACPICA configuration */
 
 #define ACPI_USE_SYSTEM_CLIBRARY
@@ -70,7 +80,9 @@
 #ifdef EXPORT_ACPI_INTERFACES
 #include <linux/export.h>
 #endif
+#ifdef CONFIG_ACPI
 #include <asm/acenv.h>
+#endif
 
 #ifndef CONFIG_ACPI
 

include/acpi/platform/aclinuxex.h

@@ -46,6 +46,28 @@
 
 #ifdef __KERNEL__
 
+#ifndef ACPI_USE_NATIVE_DIVIDE
+
+#ifndef ACPI_DIV_64_BY_32
+#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
+	do { \
+		u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \
+		(r32) = do_div ((__n), (d32)); \
+		(q32) = (u32) (__n); \
+	} while (0)
+#endif
+
+#ifndef ACPI_SHIFT_RIGHT_64
+#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
+	do { \
+		(n_lo) >>= 1; \
+		(n_lo) |= (((n_hi) & 1) << 31); \
+		(n_hi) >>= 1; \
+	} while (0)
+#endif
+
+#endif
+
 /*
  * Overrides for in-kernel ACPICA
  */

include/linux/acpi.h

@@ -29,17 +29,17 @@
 #include <linux/ioport.h>	/* for struct resource */
 #include <linux/device.h>
 
-#ifdef	CONFIG_ACPI
-
 #ifndef _LINUX
 #define _LINUX
 #endif
+#include <acpi/acpi.h>
+
+#ifdef	CONFIG_ACPI
 
 #include <linux/list.h>
 #include <linux/mod_devicetable.h>
 #include <linux/dynamic_debug.h>
 
-#include <acpi/acpi.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 #include <acpi/acpi_numa.h>

include/linux/sfi_acpi.h

@@ -63,8 +63,6 @@
 #include <linux/sfi.h>
 
 #ifdef CONFIG_SFI
-#include <acpi/acpi.h>	/* FIXME: inclusion should be removed */
-
 extern int sfi_acpi_table_parse(char *signature, char *oem_id,
 				char *oem_table_id,
 				int (*handler)(struct acpi_table_header *));
@@ -78,7 +76,6 @@ static inline int __init acpi_sfi_table_parse(char *signature,
 	return sfi_acpi_table_parse(signature, NULL, NULL, handler);
 }
 #else /* !CONFIG_SFI */
-
 static inline int sfi_acpi_table_parse(char *signature, char *oem_id,
 				char *oem_table_id,
 				int (*handler)(struct acpi_table_header *))