ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.

commit f254e3c5 upstream.

ACPICA commit 7d9fd64397d7c38899d3dc497525f6e6b044e0e3

OSPMs like Linux expect an acpi_physical_address returning value from
acpi_find_root_pointer(). This triggers warnings if sizeof (acpi_size) doesn't
equal to sizeof (acpi_physical_address):
  drivers/acpi/osl.c:275:3: warning: passing argument 1 of 'acpi_find_root_pointer' from incompatible pointer type [enabled by default]
  In file included from include/acpi/acpi.h:64:0,
                   from include/linux/acpi.h:36,
                   from drivers/acpi/osl.c:41:
  include/acpi/acpixf.h:433:1: note: expected 'acpi_size *' but argument is of type 'acpi_physical_address *'
This patch corrects acpi_find_root_pointer().

Link: https://github.com/acpica/acpica/commit/7d9fd643Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dirk Behme <dirk.behme@gmail.com>
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/acpi/acpica/tbxfroot.c

@@ -111,7 +111,7 @@ acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
  *
  ******************************************************************************/
 
-acpi_status __init acpi_find_root_pointer(acpi_size *table_address)
+acpi_status __init acpi_find_root_pointer(acpi_physical_address * table_address)
 {
 	u8 *table_ptr;
 	u8 *mem_rover;
@@ -169,7 +169,8 @@ acpi_status __init acpi_find_root_pointer(acpi_size *table_address)
 			physical_address +=
 			    (u32) ACPI_PTR_DIFF(mem_rover, table_ptr);
 
-			*table_address = physical_address;
+			*table_address =
+			    (acpi_physical_address) physical_address;
 			return_ACPI_STATUS(AE_OK);
 		}
 	}
@@ -202,7 +203,7 @@ acpi_status __init acpi_find_root_pointer(acpi_size *table_address)
 		    (ACPI_HI_RSDP_WINDOW_BASE +
 		     ACPI_PTR_DIFF(mem_rover, table_ptr));
 
-		*table_address = physical_address;
+		*table_address = (acpi_physical_address) physical_address;
 		return_ACPI_STATUS(AE_OK);
 	}
 

include/acpi/acpixf.h

@@ -175,7 +175,7 @@ acpi_status __init acpi_load_tables(void);
  */
 acpi_status __init acpi_reallocate_root_table(void);
 
-acpi_status __init acpi_find_root_pointer(acpi_size *rsdp_address);
+acpi_status __init acpi_find_root_pointer(acpi_physical_address * rsdp_address);
 
 acpi_status acpi_unload_table_id(acpi_owner_id id);