ACPI: Add support for acpi_load_table/acpi_unload_table_id

Make acpi_load_table() available for use by removing it from the #ifdef
ACPI_FUTURE_USAGE.

Also add 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@sgi.com>
Cc: Greg KH <greg@kroah.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 049e9aa1b867..81458767a90e 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -97,11 +97,12 @@ acpi_find_root_pointer(u32 flags, struct acpi_pointer *rsdp_address);
 
 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);
@@ -180,6 +181,8 @@ acpi_get_next_object(acpi_object_type type,
 
 acpi_status acpi_get_type(acpi_handle object, acpi_object_type * out_type);
 
+acpi_status acpi_get_id(acpi_handle object, acpi_owner_id * out_type);
+
 acpi_status acpi_get_parent(acpi_handle object, acpi_handle * out_handle);
 
 /*