linux-kernel - [PATCH part1 5/5] acpi, acpica: Split acpi_initialize

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Date:	Thu, 8 Aug 2013 11:39:36 +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 5/5] acpi, acpica: Split acpi_initialize_tables() into two parts.

This patch splits acpi_initialize_tables() into two steps, and
introduces two new functions:
    acpi_initialize_tables_firmware() and acpi_tb_root_table_override(),
which work just the same as acpi_initialize_tables() if they are called
in sequence.

Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>
---
 drivers/acpi/acpica/tbxface.c |   64 ++++++++++++++++++++++++++++++++++++----
 1 files changed, 57 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 98e4cad..ecaa5e1 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -72,8 +72,7 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count)
 }
 
 /*******************************************************************************
- *
- * FUNCTION:    acpi_initialize_tables
+ * FUNCTION:    acpi_initialize_tables_firmware
  *
  * PARAMETERS:  initial_table_array - Pointer to an array of pre-allocated
  *                                    struct acpi_table_desc structures. If NULL, the
@@ -86,8 +85,6 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
- *
  * NOTE:        Allows static allocation of the initial table array in order
  *              to avoid the use of dynamic memory in confined environments
  *              such as the kernel boot sequence where it may not be available.
@@ -98,8 +95,8 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count)
  ******************************************************************************/
 
 acpi_status __init
-acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
-		       u32 initial_table_count, u8 allow_resize)
+acpi_initialize_tables_firmware(struct acpi_table_desc * initial_table_array,
+				u32 initial_table_count, u8 allow_resize)
 {
 	acpi_physical_address rsdp_address;
 	acpi_status status;
@@ -144,10 +141,63 @@ acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
 	 * in a common, more useable format.
 	 */
 	status = acpi_tb_root_table_install(rsdp_address);
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_initialize_tables
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Allow host OS to replace any table installed in global root
+ *              table list.
+ *
+ ******************************************************************************/
+
+void acpi_initialize_tables_override(void)
+{
+	acpi_tb_root_table_override();
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_initialize_tables
+ *
+ * PARAMETERS:  initial_table_array - Pointer to an array of pre-allocated
+ *                                    struct acpi_table_desc structures. If NULL, the
+ *                                    array is dynamically allocated.
+ *              initial_table_count - Size of initial_table_array, in number of
+ *                                    struct acpi_table_desc structures
+ *              allow_resize        - Flag to tell Table Manager if resize of
+ *                                    pre-allocated array is allowed. Ignored
+ *                                    if initial_table_array is NULL.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
+ *
+ ******************************************************************************/
+
+acpi_status __init
+acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
+		       u32 initial_table_count, u8 allow_resize)
+{
+	acpi_status status;
+
+	status = acpi_initialize_tables_firmware(initial_table_array,
+					initial_table_count, allow_resize);
 	if (ACPI_FAILURE(status))
 		return_ACPI_STATUS(status);
 
-	acpi_tb_root_table_override();
+	/*
+	 * Allow host OS to replace any table installed in global root
+	 * table list.
+	 */
+	acpi_initialize_tables_override();
 
 	return_ACPI_STATUS(AE_OK);
 }
-- 
1.7.1

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