linux-kernel - [PATCH 3.16.y-ckt 115/129] ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical

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Message-Id: <1432285114-9254-116-git-send-email-luis.henriques@canonical.com>
Date:	Fri, 22 May 2015 09:58:20 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Lv Zheng <lv.zheng@...el.com>, Bob Moore <robert.moore@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"George G. Davis" <ggdavisiv@...il.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 115/129] ACPICA: Tables: Change acpi_find_root_pointer() to use acpi_physical_address.

3.16.7-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lv Zheng <lv.zheng@...el.com>

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@...el.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: George G. Davis <ggdavisiv@...il.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/acpi/acpica/tbxfroot.c |  7 ++++---
 include/acpi/acpixf.h          | 12 ++++++------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index 65ab8fed3d5e..32c3ccfa22c1 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/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);
 	}
 
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 6c77a132b53b..664a1a4b6f6a 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -416,13 +416,13 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status __init acpi_load_tables(void))
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status __init acpi_reallocate_root_table(void))
 
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status __init
-			    acpi_find_root_pointer(acpi_size * rsdp_address))
-
+			    acpi_find_root_pointer(acpi_physical_address *
+						   rsdp_address))
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
-			    acpi_get_table_header(acpi_string signature,
-						  u32 instance,
-						  struct acpi_table_header
-						  *out_table_header))
+			     acpi_get_table_header(acpi_string signature,
+						   u32 instance,
+						   struct acpi_table_header
+						   *out_table_header))
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 			     acpi_get_table(acpi_string signature, u32 instance,
 					    struct acpi_table_header
--
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