[PATCH 3.12 139/142] ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.

[Jiri Slaby]

From: Lv Zheng <lv.zheng@xxxxxxxxx>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f254e3c57b9d952e987502aefa0804c177dd2503 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/7d9fd643
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxx>
Signed-off-by: George G. Davis <george_davis@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 drivers/acpi/acpica/tbxfroot.c | 7 ++++---
 include/acpi/acpixf.h          | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index 948c95e80d44..cd5d08a177fe 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/drivers/acpi/acpica/tbxfroot.c
@@ -112,7 +112,7 @@ acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
  *
  ******************************************************************************/
 
-acpi_status acpi_find_root_pointer(acpi_size *table_address)
+acpi_status acpi_find_root_pointer(acpi_physical_address * table_address)
 {
 	u8 *table_ptr;
 	u8 *mem_rover;
@@ -170,7 +170,8 @@ acpi_status 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);
 		}
 	}
@@ -203,7 +204,7 @@ acpi_status 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);
 	}
 
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 85bfdbe17805..d62dfc745d8a 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -181,7 +181,7 @@ acpi_status acpi_load_tables(void);
  */
 acpi_status acpi_reallocate_root_table(void);
 
-acpi_status acpi_find_root_pointer(acpi_size *rsdp_address);
+acpi_status acpi_find_root_pointer(acpi_physical_address * rsdp_address);
 
 acpi_status acpi_unload_table_id(acpi_owner_id id);
 
-- 
2.3.7

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