ACPICA 20050708 from Bob Moore <robert.moore@intel.com>

The use of the CPU stack in the debug version of the
subsystem has been considerably reduced.  Previously, a
debug structure was declared in every function that used
the debug macros.  This structure has been removed in
favor of declaring the individual elements as parameters
to the debug functions.  This reduces the cumulative stack
use during nested execution of ACPI function calls at the
cost of a small increase in the code size of the debug
version of the subsystem.  With assistance from Alexey
Starikovskiy and Len Brown.

Added the ACPI_GET_FUNCTION_NAME macro to enable the
compiler-dependent headers to define a macro that will
return the current function name at runtime (such as
__FUNCTION__ or _func_, etc.) The function name is used
by the debug trace output.  If ACPI_GET_FUNCTION_NAME
is not defined in the compiler-dependent header, the
function name is saved on the CPU stack (one pointer per
function.) This mechanism is used because apparently there
exists no standard ANSI-C defined macro that that returns
the function name.

Alexey Starikovskiy redesigned and reimplemented the
"Owner ID" mechanism used to track namespace objects
created/deleted by ACPI tables and control method
execution.  A bitmap is now used to allocate and free the
IDs, thus solving the wraparound problem present in the
previous implementation.  The size of the namespace node
descriptor was reduced by 2 bytes as a result.

Removed the UINT32_BIT and UINT16_BIT types that were used
for the bitfield flag definitions within the headers for
the predefined ACPI tables.  These have been replaced by
UINT8_BIT in order to increase the code portability of
the subsystem.  If the use of UINT8 remains a problem,
we may be forced to eliminate bitfields entirely because
of a lack of portability.

Alexey Starikovksiy enhanced the performance of
acpi_ut_update_object_reference.  This is a frequently used
function and this improvement increases the performance
of the entire subsystem.

Alexey Starikovskiy fixed several possible memory leaks
and the inverse - premature object deletion.

Signed-off-by: Len Brown <len.brown@intel.com>

6 files changed, 235 insertions, 220 deletions

diff --git a/drivers/acpi/utilities/utcache.c b/drivers/acpi/utilities/utcache.c
index 07588812e72d..c0df0585c683 100644
--- a/drivers/acpi/utilities/utcache.c
+++ b/drivers/acpi/utilities/utcache.c
@@ -74,6 +74,9 @@ acpi_os_create_cache (
 	struct acpi_memory_list         *cache;
 
 
+	ACPI_FUNCTION_ENTRY ();
+
+
 	if (!cache_name || !return_cache || (object_size < 16)) {
 		return (AE_BAD_PARAMETER);
 	}
@@ -161,7 +164,10 @@ acpi_os_delete_cache (
 	acpi_status                     status;
 
 
-	/* Purge all objects in the cache */
+	ACPI_FUNCTION_ENTRY ();
+
+
+   /* Purge all objects in the cache */
 
 	status = acpi_os_purge_cache (cache);
 	if (ACPI_FAILURE (status)) {
@@ -259,7 +265,7 @@ acpi_os_acquire_object (
 	void                            *object;
 
 
-	ACPI_FUNCTION_NAME ("ut_acquire_from_cache");
+	ACPI_FUNCTION_NAME ("os_acquire_object");
 
 
 	if (!cache) {
@@ -286,7 +292,7 @@ acpi_os_acquire_object (
 
 		ACPI_MEM_TRACKING (cache->hits++);
 		ACPI_MEM_TRACKING (ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
-			"Object %p from %s\n", object, cache->list_name)));
+			"Object %p from %s cache\n", object, cache->list_name)));
 
 		status = acpi_ut_release_mutex (ACPI_MTX_CACHES);
 		if (ACPI_FAILURE (status)) {
diff --git a/drivers/acpi/utilities/utdebug.c b/drivers/acpi/utilities/utdebug.c
index 08362f686ec1..3d5fbc810b0b 100644
--- a/drivers/acpi/utilities/utdebug.c
+++ b/drivers/acpi/utilities/utdebug.c
@@ -116,10 +116,9 @@ acpi_ut_track_stack_ptr (
  *
  * PARAMETERS:  requested_debug_level - Requested debug print level
  *              line_number         - Caller's line number (for error output)
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Format              - Printf format field
  *              ...                 - Optional printf arguments
  *
@@ -134,7 +133,9 @@ void  ACPI_INTERNAL_VAR_XFACE
 acpi_ut_debug_print (
 	u32                             requested_debug_level,
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	char                            *format,
 	...)
 {
@@ -146,7 +147,7 @@ acpi_ut_debug_print (
 	 * Stay silent if the debug level or component ID is disabled
 	 */
 	if (!(requested_debug_level & acpi_dbg_level) ||
-		!(dbg_info->component_id & acpi_dbg_layer)) {
+		!(component_id & acpi_dbg_layer)) {
 		return;
 	}
 
@@ -169,14 +170,14 @@ acpi_ut_debug_print (
 	 * Display the module name, current line number, thread ID (if requested),
 	 * current procedure nesting level, and the current procedure name
 	 */
-	acpi_os_printf ("%8s-%04ld ", dbg_info->module_name, line_number);
+	acpi_os_printf ("%8s-%04ld ", module_name, line_number);
 
 	if (ACPI_LV_THREADS & acpi_dbg_level) {
 		acpi_os_printf ("[%04lX] ", thread_id);
 	}
 
 	acpi_os_printf ("[%02ld] %-22.22s: ",
-		acpi_gbl_nesting_level, dbg_info->proc_name);
+		acpi_gbl_nesting_level, function_name);
 
 	va_start (args, format);
 	acpi_os_vprintf (format, args);
@@ -190,10 +191,9 @@ EXPORT_SYMBOL(acpi_ut_debug_print);
  *
  * PARAMETERS:  requested_debug_level - Requested debug print level
  *              line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Format              - Printf format field
  *              ...                 - Optional printf arguments
  *
@@ -208,7 +208,9 @@ void  ACPI_INTERNAL_VAR_XFACE
 acpi_ut_debug_print_raw (
 	u32                             requested_debug_level,
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	char                            *format,
 	...)
 {
@@ -216,7 +218,7 @@ acpi_ut_debug_print_raw (
 
 
 	if (!(requested_debug_level & acpi_dbg_level) ||
-		!(dbg_info->component_id & acpi_dbg_layer)) {
+		!(component_id & acpi_dbg_layer)) {
 		return;
 	}
 
@@ -231,10 +233,9 @@ EXPORT_SYMBOL(acpi_ut_debug_print_raw);
  * FUNCTION:    acpi_ut_trace
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *
  * RETURN:      None
  *
@@ -246,14 +247,17 @@ EXPORT_SYMBOL(acpi_ut_debug_print_raw);
 void
 acpi_ut_trace (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info)
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id)
 {
 
 	acpi_gbl_nesting_level++;
 	acpi_ut_track_stack_ptr ();
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s\n", acpi_gbl_fn_entry_str);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s\n", acpi_gbl_fn_entry_str);
 }
 EXPORT_SYMBOL(acpi_ut_trace);
 
@@ -263,10 +267,9 @@ EXPORT_SYMBOL(acpi_ut_trace);
  * FUNCTION:    acpi_ut_trace_ptr
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Pointer             - Pointer to display
  *
  * RETURN:      None
@@ -279,14 +282,17 @@ EXPORT_SYMBOL(acpi_ut_trace);
 void
 acpi_ut_trace_ptr (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	void                            *pointer)
 {
 	acpi_gbl_nesting_level++;
 	acpi_ut_track_stack_ptr ();
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s %p\n", acpi_gbl_fn_entry_str, pointer);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s %p\n", acpi_gbl_fn_entry_str, pointer);
 }
 
 
@@ -295,10 +301,9 @@ acpi_ut_trace_ptr (
  * FUNCTION:    acpi_ut_trace_str
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              String              - Additional string to display
  *
  * RETURN:      None
@@ -311,15 +316,18 @@ acpi_ut_trace_ptr (
 void
 acpi_ut_trace_str (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	char                            *string)
 {
 
 	acpi_gbl_nesting_level++;
 	acpi_ut_track_stack_ptr ();
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s %s\n", acpi_gbl_fn_entry_str, string);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s %s\n", acpi_gbl_fn_entry_str, string);
 }
 
 
@@ -328,10 +336,9 @@ acpi_ut_trace_str (
  * FUNCTION:    acpi_ut_trace_u32
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Integer             - Integer to display
  *
  * RETURN:      None
@@ -344,15 +351,18 @@ acpi_ut_trace_str (
 void
 acpi_ut_trace_u32 (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	u32                             integer)
 {
 
 	acpi_gbl_nesting_level++;
 	acpi_ut_track_stack_ptr ();
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s %08X\n", acpi_gbl_fn_entry_str, integer);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s %08X\n", acpi_gbl_fn_entry_str, integer);
 }
 
 
@@ -361,10 +371,9 @@ acpi_ut_trace_u32 (
  * FUNCTION:    acpi_ut_exit
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *
  * RETURN:      None
  *
@@ -376,11 +385,14 @@ acpi_ut_trace_u32 (
 void
 acpi_ut_exit (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info)
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id)
 {
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s\n", acpi_gbl_fn_exit_str);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s\n", acpi_gbl_fn_exit_str);
 
 	acpi_gbl_nesting_level--;
 }
@@ -392,10 +404,9 @@ EXPORT_SYMBOL(acpi_ut_exit);
  * FUNCTION:    acpi_ut_status_exit
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Status              - Exit status code
  *
  * RETURN:      None
@@ -408,19 +419,23 @@ EXPORT_SYMBOL(acpi_ut_exit);
 void
 acpi_ut_status_exit (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	acpi_status                     status)
 {
 
 	if (ACPI_SUCCESS (status)) {
-		acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-				"%s %s\n", acpi_gbl_fn_exit_str,
-				acpi_format_exception (status));
+		acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+			line_number, function_name, module_name, component_id,
+			"%s %s\n", acpi_gbl_fn_exit_str,
+			acpi_format_exception (status));
 	}
 	else {
-		acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-				"%s ****Exception****: %s\n", acpi_gbl_fn_exit_str,
-				acpi_format_exception (status));
+		acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+			line_number, function_name, module_name, component_id,
+			"%s ****Exception****: %s\n", acpi_gbl_fn_exit_str,
+			acpi_format_exception (status));
 	}
 
 	acpi_gbl_nesting_level--;
@@ -433,10 +448,9 @@ EXPORT_SYMBOL(acpi_ut_status_exit);
  * FUNCTION:    acpi_ut_value_exit
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Value               - Value to be printed with exit msg
  *
  * RETURN:      None
@@ -449,13 +463,16 @@ EXPORT_SYMBOL(acpi_ut_status_exit);
 void
 acpi_ut_value_exit (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	acpi_integer                    value)
 {
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s %8.8X%8.8X\n", acpi_gbl_fn_exit_str,
-			ACPI_FORMAT_UINT64 (value));
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s %8.8X%8.8X\n", acpi_gbl_fn_exit_str,
+		ACPI_FORMAT_UINT64 (value));
 
 	acpi_gbl_nesting_level--;
 }
@@ -467,10 +484,9 @@ EXPORT_SYMBOL(acpi_ut_value_exit);
  * FUNCTION:    acpi_ut_ptr_exit
  *
  * PARAMETERS:  line_number         - Caller's line number
- *              dbg_info            - Contains:
- *                  proc_name           - Caller's procedure name
- *                  module_name         - Caller's module name
- *                  component_id        - Caller's component ID
+ *              function_name       - Caller's procedure name
+ *              module_name         - Caller's module name
+ *              component_id        - Caller's component ID
  *              Ptr                 - Pointer to display
  *
  * RETURN:      None
@@ -483,12 +499,15 @@ EXPORT_SYMBOL(acpi_ut_value_exit);
 void
 acpi_ut_ptr_exit (
 	u32                             line_number,
-	struct acpi_debug_print_info    *dbg_info,
+	char                            *function_name,
+	char                            *module_name,
+	u32                             component_id,
 	u8                              *ptr)
 {
 
-	acpi_ut_debug_print (ACPI_LV_FUNCTIONS, line_number, dbg_info,
-			"%s %p\n", acpi_gbl_fn_exit_str, ptr);
+	acpi_ut_debug_print (ACPI_LV_FUNCTIONS,
+		line_number, function_name, module_name, component_id,
+		"%s %p\n", acpi_gbl_fn_exit_str, ptr);
 
 	acpi_gbl_nesting_level--;
 }
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c
index be97ada23c3d..eeafb324c504 100644
--- a/drivers/acpi/utilities/utdelete.c
+++ b/drivers/acpi/utilities/utdelete.c
@@ -435,35 +435,24 @@ acpi_ut_update_object_reference (
 	union acpi_operand_object       *object,
 	u16                             action)
 {
-	acpi_status                     status;
-	u32                             i;
-	union acpi_generic_state         *state_list = NULL;
-	union acpi_generic_state         *state;
+	acpi_status                     status = AE_OK;
+	union acpi_generic_state        *state_list = NULL;
+	union acpi_operand_object       *next_object = NULL;
+	union acpi_generic_state        *state;
+	acpi_native_uint                i;
 
 
 	ACPI_FUNCTION_TRACE_PTR ("ut_update_object_reference", object);
 
 
-	/* Ignore a null object ptr */
+	while (object) {
+		/* Make sure that this isn't a namespace handle */
 
-	if (!object) {
-		return_ACPI_STATUS (AE_OK);
-	}
-
-	/* Make sure that this isn't a namespace handle */
-
-	if (ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED) {
-		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
-			"Object %p is NS handle\n", object));
-		return_ACPI_STATUS (AE_OK);
-	}
-
-	state = acpi_ut_create_update_state (object, action);
-
-	while (state) {
-		object = state->update.object;
-		action = state->update.value;
-		acpi_ut_delete_generic_state (state);
+		if (ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
+				"Object %p is NS handle\n", object));
+			return_ACPI_STATUS (AE_OK);
+		}
 
 		/*
 		 * All sub-objects must have their reference count incremented also.
@@ -476,12 +465,10 @@ acpi_ut_update_object_reference (
 			acpi_ut_update_ref_count (object->device.device_notify, action);
 			break;
 
-
 		case ACPI_TYPE_PACKAGE:
-
 			/*
-			 * We must update all the sub-objects of the package
-			 * (Each of whom may have their own sub-objects, etc.
+			 * We must update all the sub-objects of the package,
+			 * each of whom may have their own sub-objects.
 			 */
 			for (i = 0; i < object->package.count; i++) {
 				/*
@@ -497,35 +484,19 @@ acpi_ut_update_object_reference (
 			}
 			break;
 
-
 		case ACPI_TYPE_BUFFER_FIELD:
 
-			status = acpi_ut_create_update_state_and_push (
-					 object->buffer_field.buffer_obj, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				goto error_exit;
-			}
+			next_object = object->buffer_field.buffer_obj;
 			break;
 
-
 		case ACPI_TYPE_LOCAL_REGION_FIELD:
 
-			status = acpi_ut_create_update_state_and_push (
-					 object->field.region_obj, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				goto error_exit;
-			}
-		   break;
-
+			next_object = object->field.region_obj;
+			break;
 
 		case ACPI_TYPE_LOCAL_BANK_FIELD:
 
-			status = acpi_ut_create_update_state_and_push (
-					 object->bank_field.bank_obj, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				goto error_exit;
-			}
-
+			next_object = object->bank_field.bank_obj;
 			status = acpi_ut_create_update_state_and_push (
 					 object->bank_field.region_obj, action, &state_list);
 			if (ACPI_FAILURE (status)) {
@@ -533,15 +504,9 @@ acpi_ut_update_object_reference (
 			}
 			break;
 
-
 		case ACPI_TYPE_LOCAL_INDEX_FIELD:
 
-			status = acpi_ut_create_update_state_and_push (
-					 object->index_field.index_obj, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				goto error_exit;
-			}
-
+			next_object = object->index_field.index_obj;
 			status = acpi_ut_create_update_state_and_push (
 					 object->index_field.data_obj, action, &state_list);
 			if (ACPI_FAILURE (status)) {
@@ -549,28 +514,19 @@ acpi_ut_update_object_reference (
 			}
 			break;
 
-
 		case ACPI_TYPE_LOCAL_REFERENCE:
-
 			/*
 			 * The target of an Index (a package, string, or buffer) must track
 			 * changes to the ref count of the index.
 			 */
 			if (object->reference.opcode == AML_INDEX_OP) {
-				status = acpi_ut_create_update_state_and_push (
-						 object->reference.object, action, &state_list);
-				if (ACPI_FAILURE (status)) {
-					goto error_exit;
-				}
+				next_object = object->reference.object;
 			}
 			break;
 
-
 		case ACPI_TYPE_REGION:
 		default:
-
-			/* No subobjects */
-			break;
+			break;/* No subobjects */
 		}
 
 		/*
@@ -579,15 +535,23 @@ acpi_ut_update_object_reference (
 		 * main object to be deleted.
 		 */
 		acpi_ut_update_ref_count (object, action);
+		object = NULL;
 
 		/* Move on to the next object to be updated */
 
-		state = acpi_ut_pop_generic_state (&state_list);
+		if (next_object) {
+			object = next_object;
+			next_object = NULL;
+		}
+		else if (state_list) {
+			state = acpi_ut_pop_generic_state (&state_list);
+			object = state->update.object;
+			acpi_ut_delete_generic_state (state);
+		}
 	}
 
 	return_ACPI_STATUS (AE_OK);
 
-
 error_exit:
 
 	ACPI_REPORT_ERROR (("Could not update object reference count, %s\n",
diff --git a/drivers/acpi/utilities/utglobal.c b/drivers/acpi/utilities/utglobal.c
index 8653dda4f813..0e4161c81076 100644
--- a/drivers/acpi/utilities/utglobal.c
+++ b/drivers/acpi/utilities/utglobal.c
@@ -738,73 +738,6 @@ acpi_ut_valid_object_type (
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ut_allocate_owner_id
- *
- * PARAMETERS:  id_type         - Type of ID (method or table)
- *
- * DESCRIPTION: Allocate a table or method owner id
- *
- * NOTE: this algorithm has a wraparound problem at 64_k method invocations, and
- *       should be revisited (TBD)
- *
- ******************************************************************************/
-
-acpi_owner_id
-acpi_ut_allocate_owner_id (
-	u32                             id_type)
-{
-	acpi_owner_id                   owner_id = 0xFFFF;
-
-
-	ACPI_FUNCTION_TRACE ("ut_allocate_owner_id");
-
-
-	if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_CACHES)))
-	{
-		return (0);
-	}
-
-	switch (id_type)
-	{
-	case ACPI_OWNER_TYPE_TABLE:
-
-		owner_id = acpi_gbl_next_table_owner_id;
-		acpi_gbl_next_table_owner_id++;
-
-		/* Check for wraparound */
-
-		if (acpi_gbl_next_table_owner_id == ACPI_FIRST_METHOD_ID)
-		{
-			acpi_gbl_next_table_owner_id = ACPI_FIRST_TABLE_ID;
-			ACPI_REPORT_WARNING (("Table owner ID wraparound\n"));
-		}
-		break;
-
-
-	case ACPI_OWNER_TYPE_METHOD:
-
-		owner_id = acpi_gbl_next_method_owner_id;
-		acpi_gbl_next_method_owner_id++;
-
-		if (acpi_gbl_next_method_owner_id == ACPI_FIRST_TABLE_ID)
-		{
-			/* Check for wraparound */
-
-			acpi_gbl_next_method_owner_id = ACPI_FIRST_METHOD_ID;
-		}
-		break;
-
-	default:
-		break;
-	}
-
-	(void) acpi_ut_release_mutex (ACPI_MTX_CACHES);
-	return_VALUE (owner_id);
-}
-
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ut_init_globals
  *
  * PARAMETERS:  None
@@ -848,7 +781,7 @@ acpi_ut_init_globals (
 	for (i = 0; i < NUM_MUTEX; i++)
 	{
 		acpi_gbl_mutex_info[i].mutex        = NULL;
-		acpi_gbl_mutex_info[i].owner_id     = ACPI_MUTEX_NOT_ACQUIRED;
+		acpi_gbl_mutex_info[i].thread_id    = ACPI_MUTEX_NOT_ACQUIRED;
 		acpi_gbl_mutex_info[i].use_count    = 0;
 	}
 
@@ -889,8 +822,7 @@ acpi_ut_init_globals (
 	acpi_gbl_ns_lookup_count            = 0;
 	acpi_gbl_ps_find_count              = 0;
 	acpi_gbl_acpi_hardware_present      = TRUE;
-	acpi_gbl_next_table_owner_id        = ACPI_FIRST_TABLE_ID;
-	acpi_gbl_next_method_owner_id       = ACPI_FIRST_METHOD_ID;
+	acpi_gbl_owner_id_mask              = 0;
 	acpi_gbl_debugger_configuration     = DEBUGGER_THREADING;
 	acpi_gbl_db_output_flags            = ACPI_DB_CONSOLE_OUTPUT;
 
diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index 207c836aec64..df715cd89105 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -52,6 +52,100 @@
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ut_allocate_owner_id
+ *
+ * PARAMETERS:  owner_id        - Where the new owner ID is returned
+ *
+ * DESCRIPTION: Allocate a table or method owner id
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_allocate_owner_id (
+	acpi_owner_id                   *owner_id)
+{
+	acpi_native_uint                i;
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ut_allocate_owner_id");
+
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_CACHES);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Find a free owner ID */
+
+	for (i = 0; i < 32; i++) {
+		if (!(acpi_gbl_owner_id_mask & (1 << i))) {
+			acpi_gbl_owner_id_mask |= (1 << i);
+			*owner_id = (acpi_owner_id) i;
+			goto exit;
+		}
+	}
+
+	/*
+	 * If we are here, all owner_ids have been allocated. This probably should
+	 * not happen since the IDs are reused after deallocation. The IDs are
+	 * allocated upon table load (one per table) and method execution, and
+	 * they are released when a table is unloaded or a method completes
+	 * execution.
+	 */
+	status = AE_OWNER_ID_LIMIT;
+	ACPI_REPORT_ERROR ((
+		"Could not allocate new owner_id (32 max), AE_OWNER_ID_LIMIT\n"));
+
+exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_CACHES);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_release_owner_id
+ *
+ * PARAMETERS:  owner_id        - A previously allocated owner ID
+ *
+ * DESCRIPTION: Release a table or method owner id
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_release_owner_id (
+	acpi_owner_id                   owner_id)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("ut_release_owner_id");
+
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_CACHES);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Free the owner ID */
+
+	if (acpi_gbl_owner_id_mask & (1 << owner_id)) {
+		acpi_gbl_owner_id_mask ^= (1 << owner_id);
+	}
+	else {
+		/* This owner_id has not been allocated */
+
+		status = AE_NOT_EXIST;
+	}
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_CACHES);
+	return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ut_strupr (strupr)
  *
  * PARAMETERS:  src_string      - The source string to convert
diff --git a/drivers/acpi/utilities/utmutex.c b/drivers/acpi/utilities/utmutex.c
index a80b97cb2e56..0699b6be62b6 100644
--- a/drivers/acpi/utilities/utmutex.c
+++ b/drivers/acpi/utilities/utmutex.c
@@ -159,7 +159,7 @@ acpi_ut_create_mutex (
 	if (!acpi_gbl_mutex_info[mutex_id].mutex) {
 		status = acpi_os_create_semaphore (1, 1,
 				  &acpi_gbl_mutex_info[mutex_id].mutex);
-		acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
+		acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 		acpi_gbl_mutex_info[mutex_id].use_count = 0;
 	}
 
@@ -196,7 +196,7 @@ acpi_ut_delete_mutex (
 	status = acpi_os_delete_semaphore (acpi_gbl_mutex_info[mutex_id].mutex);
 
 	acpi_gbl_mutex_info[mutex_id].mutex = NULL;
-	acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
+	acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 
 	return_ACPI_STATUS (status);
 }
@@ -274,7 +274,7 @@ acpi_ut_acquire_mutex (
 			this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
 
 		acpi_gbl_mutex_info[mutex_id].use_count++;
-		acpi_gbl_mutex_info[mutex_id].owner_id = this_thread_id;
+		acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id;
 	}
 	else {
 		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
@@ -322,7 +322,7 @@ acpi_ut_release_mutex (
 	/*
 	 * Mutex must be acquired in order to release it!
 	 */
-	if (acpi_gbl_mutex_info[mutex_id].owner_id == ACPI_MUTEX_NOT_ACQUIRED) {
+	if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) {
 		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 			"Mutex [%s] is not acquired, cannot release\n",
 			acpi_ut_get_mutex_name (mutex_id)));
@@ -359,7 +359,7 @@ acpi_ut_release_mutex (
 
 	/* Mark unlocked FIRST */
 
-	acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
+	acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
 
 	status = acpi_os_signal_semaphore (acpi_gbl_mutex_info[mutex_id].mutex, 1);