linux-kernel - [PATCH part1 4/5] acpi, acpica: Call two new functions instead of acpi_tb_parse_root_table() in acpi_initialize

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Date:	Thu, 8 Aug 2013 11:39:35 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	robert.moore@...el.com, lv.zheng@...el.com, rjw@...k.pl,
	lenb@...nel.org, tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH part1 4/5] acpi, acpica: Call two new functions instead of acpi_tb_parse_root_table() in acpi_initialize_tables().

The previous patch introduces two new functions:
    acpi_tb_root_table_install() and acpi_tb_root_table_override(),
which work just the same as acpi_tb_parse_root_table() if they are
called in sequence.

In order to split acpi_initialize_tables(), call thes two functions
in acpi_initialize_tables(). This will keep acpi_initialize_tables()
works as before.

Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>
---
 drivers/acpi/acpica/actables.h |    2 ++
 drivers/acpi/acpica/tbxface.c  |    9 +++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/acpica/actables.h b/drivers/acpi/acpica/actables.h
index 7755e91..641796e 100644
--- a/drivers/acpi/acpica/actables.h
+++ b/drivers/acpi/acpica/actables.h
@@ -120,6 +120,8 @@ void
 acpi_tb_install_table(acpi_physical_address address,
 		      char *signature, u32 table_index);
 
+acpi_status acpi_tb_root_table_install(acpi_physical_address rsdp_address);
+void acpi_tb_root_table_override(void);
 acpi_status acpi_tb_parse_root_table(acpi_physical_address rsdp_address);
 
 #endif				/* __ACTABLES_H__ */
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index ad11162..98e4cad 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -143,8 +143,13 @@ acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
 	 * Root Table Array. This array contains the information of the RSDT/XSDT
 	 * in a common, more useable format.
 	 */
-	status = acpi_tb_parse_root_table(rsdp_address);
-	return_ACPI_STATUS(status);
+	status = acpi_tb_root_table_install(rsdp_address);
+	if (ACPI_FAILURE(status))
+		return_ACPI_STATUS(status);
+
+	acpi_tb_root_table_override();
+
+	return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************
-- 
1.7.1

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