This patch makes acpi_load_table() available for use by removing it from the #ifdef ACPI_FUTURE_USAGE. It also adds a new routine used to unload an ACPI table of a given type and "id" - acpi_unload_table_id(). The implementation of this new routine was almost a direct copy of existing routine acpi_unload_table() - only difference being that it only removes a specific table id instead of ALL tables of a given type. The SN hotplug driver (sgi_hotplug.c) now uses both of these interfaces to dynamically load and unload SSDT ACPI tables. Also, a few other ACPI routines now used by the SN hotplug driver are exported (since the driver can be a loadable module): acpi_ns_map_handle_to_node acpi_ns_convert_entry_to_handle acpi_ns_get_next_node Signed-off-by: Aaron Young <ayoung@xxxxxxx> --- Resend #1 Original send of this patch was outdated and did not have acpi_ut_acquire_mutex() and acpi_ut_release_mutex() calls in acpi_unload_table_id(). drivers/acpi/namespace/nsutils.c | 4 ++ drivers/acpi/namespace/nswalk.c | 2 + drivers/acpi/tables/tbxface.c | 54 ++++++++++++++++++++++++++++- include/acpi/acpixf.h | 5 +- 4 files changed, 62 insertions(+), 3 deletions(-) Index: linux-2.6/drivers/acpi/namespace/nsutils.c =================================================================== --- linux-2.6.orig/drivers/acpi/namespace/nsutils.c 2006-11-15 08:18:27.587345652 -0600 +++ linux-2.6/drivers/acpi/namespace/nsutils.c 2006-11-15 08:33:26.129843027 -0600 @@ -701,6 +701,8 @@ struct acpi_namespace_node *acpi_ns_map_ return (ACPI_CAST_PTR(struct acpi_namespace_node, handle)); } +ACPI_EXPORT_SYMBOL(acpi_ns_map_handle_to_node) + /******************************************************************************* * * FUNCTION: acpi_ns_convert_entry_to_handle @@ -737,6 +739,8 @@ acpi_handle acpi_ns_convert_entry_to_han ------------------------------------------------------*/ } +ACPI_EXPORT_SYMBOL(acpi_ns_convert_entry_to_handle) + /******************************************************************************* * * FUNCTION: acpi_ns_terminate Index: linux-2.6/drivers/acpi/namespace/nswalk.c =================================================================== --- linux-2.6.orig/drivers/acpi/namespace/nswalk.c 2006-11-15 08:18:27.587345652 -0600 +++ linux-2.6/drivers/acpi/namespace/nswalk.c 2006-11-15 08:33:26.141845016 -0600 @@ -119,6 +119,8 @@ struct acpi_namespace_node *acpi_ns_get_ return (NULL); } +ACPI_EXPORT_SYMBOL(acpi_ns_get_next_node) + /******************************************************************************* * * FUNCTION: acpi_ns_walk_namespace Index: linux-2.6/drivers/acpi/tables/tbxface.c =================================================================== --- linux-2.6.orig/drivers/acpi/tables/tbxface.c 2006-11-15 08:18:27.635354917 -0600 +++ linux-2.6/drivers/acpi/tables/tbxface.c 2006-11-15 09:54:54.715023969 -0600 @@ -123,7 +123,6 @@ acpi_status acpi_load_tables(void) ACPI_EXPORT_SYMBOL(acpi_load_tables) -#ifdef ACPI_FUTURE_USAGE /******************************************************************************* * * FUNCTION: acpi_load_table @@ -221,6 +220,59 @@ ACPI_EXPORT_SYMBOL(acpi_load_table) /******************************************************************************* * + * FUNCTION: acpi_unload_table_id + * + * PARAMETERS: table_type - Type of table to be unloaded + * id - Owner ID of the table to be removed. + * + * RETURN: Status + * + * DESCRIPTION: This routine is used to force the unload of a table (by id) + * + ******************************************************************************/ +acpi_status acpi_unload_table_id(acpi_table_type table_type, acpi_owner_id id) +{ + struct acpi_table_desc *table_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE(acpi_unload_table); + + /* Parameter validation */ + if (table_type > ACPI_TABLE_ID_MAX) + return_ACPI_STATUS(AE_BAD_PARAMETER); + + /* Find table from the requested type list */ + table_desc = acpi_gbl_table_lists[table_type].next; + while (table_desc && table_desc->owner_id != id) + table_desc = table_desc->next; + + if (!table_desc) + return_ACPI_STATUS(AE_NOT_EXIST); + + /* + * Delete all namespace objects owned by this table. Note that these + * objects can appear anywhere in the namespace by virtue of the AML + * "Scope" operator. Thus, we need to track ownership by an ID, not + * simply a position within the hierarchy + */ + acpi_ns_delete_namespace_by_owner(table_desc->owner_id); + + status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); + if (ACPI_FAILURE(status)) + return_ACPI_STATUS(status); + + (void)acpi_tb_uninstall_table(table_desc); + + (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); + + return_ACPI_STATUS(AE_OK); +} + +ACPI_EXPORT_SYMBOL(acpi_unload_table_id) + +#ifdef ACPI_FUTURE_USAGE +/******************************************************************************* + * * FUNCTION: acpi_unload_table * * PARAMETERS: table_type - Type of table to be unloaded Index: linux-2.6/include/acpi/acpixf.h =================================================================== --- linux-2.6.orig/include/acpi/acpixf.h 2006-11-15 08:18:33.708526941 -0600 +++ linux-2.6/include/acpi/acpixf.h 2006-11-15 08:33:26.197854296 -0600 @@ -97,11 +97,12 @@ acpi_find_root_pointer(u32 flags, struct acpi_status acpi_load_tables(void); -#ifdef ACPI_FUTURE_USAGE acpi_status acpi_load_table(struct acpi_table_header *table_ptr); -acpi_status acpi_unload_table(acpi_table_type table_type); +acpi_status acpi_unload_table_id(acpi_table_type table_type, acpi_owner_id id); +#ifdef ACPI_FUTURE_USAGE +acpi_status acpi_unload_table(acpi_table_type table_type); acpi_status acpi_get_table_header(acpi_table_type table_type, u32 instance, struct acpi_table_header *out_table_header); - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
![]() |