Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c
new file mode 100644
index 0000000..9a52ad5
--- /dev/null
+++ b/drivers/acpi/utilities/utdelete.c
@@ -0,0 +1,700 @@
+/*******************************************************************************
+ *
+ * Module Name: utdelete - object deletion and reference count utilities
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#include <acpi/acpi.h>
+#include <acpi/acinterp.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+#include <acpi/amlcode.h>
+
+#define _COMPONENT ACPI_UTILITIES
+ ACPI_MODULE_NAME ("utdelete")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_delete_internal_obj
+ *
+ * PARAMETERS: *Object - Pointer to the list to be deleted
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Low level object deletion, after reference counts have been
+ * updated (All reference counts, including sub-objects!)
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_delete_internal_obj (
+ union acpi_operand_object *object)
+{
+ void *obj_pointer = NULL;
+ union acpi_operand_object *handler_desc;
+ union acpi_operand_object *second_desc;
+ union acpi_operand_object *next_desc;
+
+
+ ACPI_FUNCTION_TRACE_PTR ("ut_delete_internal_obj", object);
+
+
+ if (!object) {
+ return_VOID;
+ }
+
+ /*
+ * Must delete or free any pointers within the object that are not
+ * actual ACPI objects (for example, a raw buffer pointer).
+ */
+ switch (ACPI_GET_OBJECT_TYPE (object)) {
+ case ACPI_TYPE_STRING:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
+ object, object->string.pointer));
+
+ /* Free the actual string buffer */
+
+ if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
+ /* But only if it is NOT a pointer into an ACPI table */
+
+ obj_pointer = object->string.pointer;
+ }
+ break;
+
+
+ case ACPI_TYPE_BUFFER:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
+ object, object->buffer.pointer));
+
+ /* Free the actual buffer */
+
+ if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
+ /* But only if it is NOT a pointer into an ACPI table */
+
+ obj_pointer = object->buffer.pointer;
+ }
+ break;
+
+
+ case ACPI_TYPE_PACKAGE:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
+ object->package.count));
+
+ /*
+ * Elements of the package are not handled here, they are deleted
+ * separately
+ */
+
+ /* Free the (variable length) element pointer array */
+
+ obj_pointer = object->package.elements;
+ break;
+
+
+ case ACPI_TYPE_DEVICE:
+
+ if (object->device.gpe_block) {
+ (void) acpi_ev_delete_gpe_block (object->device.gpe_block);
+ }
+
+ /* Walk the handler list for this device */
+
+ handler_desc = object->device.handler;
+ while (handler_desc) {
+ next_desc = handler_desc->address_space.next;
+ acpi_ut_remove_reference (handler_desc);
+ handler_desc = next_desc;
+ }
+ break;
+
+
+ case ACPI_TYPE_MUTEX:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "***** Mutex %p, Semaphore %p\n",
+ object, object->mutex.semaphore));
+
+ acpi_ex_unlink_mutex (object);
+ (void) acpi_os_delete_semaphore (object->mutex.semaphore);
+ break;
+
+
+ case ACPI_TYPE_EVENT:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "***** Event %p, Semaphore %p\n",
+ object, object->event.semaphore));
+
+ (void) acpi_os_delete_semaphore (object->event.semaphore);
+ object->event.semaphore = NULL;
+ break;
+
+
+ case ACPI_TYPE_METHOD:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "***** Method %p\n", object));
+
+ /* Delete the method semaphore if it exists */
+
+ if (object->method.semaphore) {
+ (void) acpi_os_delete_semaphore (object->method.semaphore);
+ object->method.semaphore = NULL;
+ }
+ break;
+
+
+ case ACPI_TYPE_REGION:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "***** Region %p\n", object));
+
+ second_desc = acpi_ns_get_secondary_object (object);
+ if (second_desc) {
+ /*
+ * Free the region_context if and only if the handler is one of the
+ * default handlers -- and therefore, we created the context object
+ * locally, it was not created by an external caller.
+ */
+ handler_desc = object->region.handler;
+ if (handler_desc) {
+ if (handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
+ obj_pointer = second_desc->extra.region_context;
+ }
+
+ acpi_ut_remove_reference (handler_desc);
+ }
+
+ /* Now we can free the Extra object */
+
+ acpi_ut_delete_object_desc (second_desc);
+ }
+ break;
+
+
+ case ACPI_TYPE_BUFFER_FIELD:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "***** Buffer Field %p\n", object));
+
+ second_desc = acpi_ns_get_secondary_object (object);
+ if (second_desc) {
+ acpi_ut_delete_object_desc (second_desc);
+ }
+ break;
+
+
+ default:
+ break;
+ }
+
+ /* Free any allocated memory (pointer within the object) found above */
+
+ if (obj_pointer) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
+ obj_pointer));
+ ACPI_MEM_FREE (obj_pointer);
+ }
+
+ /* Now the object can be safely deleted */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
+ object, acpi_ut_get_object_type_name (object)));
+
+ acpi_ut_delete_object_desc (object);
+ return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_delete_internal_object_list
+ *
+ * PARAMETERS: *obj_list - Pointer to the list to be deleted
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: This function deletes an internal object list, including both
+ * simple objects and package objects
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_delete_internal_object_list (
+ union acpi_operand_object **obj_list)
+{
+ union acpi_operand_object **internal_obj;
+
+
+ ACPI_FUNCTION_TRACE ("ut_delete_internal_object_list");
+
+
+ /* Walk the null-terminated internal list */
+
+ for (internal_obj = obj_list; *internal_obj; internal_obj++) {
+ acpi_ut_remove_reference (*internal_obj);
+ }
+
+ /* Free the combined parameter pointer list and object array */
+
+ ACPI_MEM_FREE (obj_list);
+ return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_update_ref_count
+ *
+ * PARAMETERS: *Object - Object whose ref count is to be updated
+ * Action - What to do
+ *
+ * RETURN: New ref count
+ *
+ * DESCRIPTION: Modify the ref count and return it.
+ *
+ ******************************************************************************/
+
+static void
+acpi_ut_update_ref_count (
+ union acpi_operand_object *object,
+ u32 action)
+{
+ u16 count;
+ u16 new_count;
+
+
+ ACPI_FUNCTION_NAME ("ut_update_ref_count");
+
+
+ if (!object) {
+ return;
+ }
+
+ count = object->common.reference_count;
+ new_count = count;
+
+ /*
+ * Perform the reference count action (increment, decrement, or force delete)
+ */
+ switch (action) {
+
+ case REF_INCREMENT:
+
+ new_count++;
+ object->common.reference_count = new_count;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Obj %p Refs=%X, [Incremented]\n",
+ object, new_count));
+ break;
+
+
+ case REF_DECREMENT:
+
+ if (count < 1) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Obj %p Refs=%X, can't decrement! (Set to 0)\n",
+ object, new_count));
+
+ new_count = 0;
+ }
+ else {
+ new_count--;
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Obj %p Refs=%X, [Decremented]\n",
+ object, new_count));
+ }
+
+ if (ACPI_GET_OBJECT_TYPE (object) == ACPI_TYPE_METHOD) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Method Obj %p Refs=%X, [Decremented]\n",
+ object, new_count));
+ }
+
+ object->common.reference_count = new_count;
+ if (new_count == 0) {
+ acpi_ut_delete_internal_obj (object);
+ }
+
+ break;
+
+
+ case REF_FORCE_DELETE:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Obj %p Refs=%X, Force delete! (Set to 0)\n",
+ object, count));
+
+ new_count = 0;
+ object->common.reference_count = new_count;
+ acpi_ut_delete_internal_obj (object);
+ break;
+
+
+ default:
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown action (%X)\n", action));
+ break;
+ }
+
+ /*
+ * Sanity check the reference count, for debug purposes only.
+ * (A deleted object will have a huge reference count)
+ */
+ if (count > ACPI_MAX_REFERENCE_COUNT) {
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
+ "**** Warning **** Large Reference Count (%X) in object %p\n\n",
+ count, object));
+ }
+
+ return;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_update_object_reference
+ *
+ * PARAMETERS: *Object - Increment ref count for this object
+ * and all sub-objects
+ * Action - Either REF_INCREMENT or REF_DECREMENT or
+ * REF_FORCE_DELETE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Increment the object reference count
+ *
+ * Object references are incremented when:
+ * 1) An object is attached to a Node (namespace object)
+ * 2) An object is copied (all subobjects must be incremented)
+ *
+ * Object references are decremented when:
+ * 1) An object is detached from an Node
+ *
+ ******************************************************************************/
+
+acpi_status
+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;
+ union acpi_operand_object *tmp;
+
+ ACPI_FUNCTION_TRACE_PTR ("ut_update_object_reference", object);
+
+
+ /* Ignore a null object ptr */
+
+ 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);
+
+ /*
+ * All sub-objects must have their reference count incremented also.
+ * Different object types have different subobjects.
+ */
+ switch (ACPI_GET_OBJECT_TYPE (object)) {
+ case ACPI_TYPE_DEVICE:
+
+ tmp = object->device.system_notify;
+ if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->device.system_notify = NULL;
+ acpi_ut_update_ref_count (tmp, action);
+
+ tmp = object->device.device_notify;
+ if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->device.device_notify = NULL;
+ acpi_ut_update_ref_count (tmp, 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.
+ */
+ for (i = 0; i < object->package.count; i++) {
+ /*
+ * Push each element onto the stack for later processing.
+ * Note: There can be null elements within the package,
+ * these are simply ignored
+ */
+ status = acpi_ut_create_update_state_and_push (
+ object->package.elements[i], action, &state_list);
+ if (ACPI_FAILURE (status)) {
+ goto error_exit;
+ }
+
+ tmp = object->package.elements[i];
+ if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->package.elements[i] = NULL;
+ }
+ 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;
+ }
+
+ tmp = object->buffer_field.buffer_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->buffer_field.buffer_obj = NULL;
+ 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;
+ }
+
+ tmp = object->field.region_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->field.region_obj = NULL;
+ 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;
+ }
+
+ tmp = object->bank_field.bank_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->bank_field.bank_obj = NULL;
+
+ status = acpi_ut_create_update_state_and_push (
+ object->bank_field.region_obj, action, &state_list);
+ if (ACPI_FAILURE (status)) {
+ goto error_exit;
+ }
+
+ tmp = object->bank_field.region_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->bank_field.region_obj = NULL;
+ 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;
+ }
+
+ tmp = object->index_field.index_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->index_field.index_obj = NULL;
+
+ status = acpi_ut_create_update_state_and_push (
+ object->index_field.data_obj, action, &state_list);
+ if (ACPI_FAILURE (status)) {
+ goto error_exit;
+ }
+
+ tmp = object->index_field.data_obj;
+ if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT)
+ object->index_field.data_obj = NULL;
+ 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;
+ }
+ }
+ break;
+
+
+ case ACPI_TYPE_REGION:
+ default:
+
+ /* No subobjects */
+ break;
+ }
+
+ /*
+ * Now we can update the count in the main object. This can only
+ * happen after we update the sub-objects in case this causes the
+ * main object to be deleted.
+ */
+ acpi_ut_update_ref_count (object, action);
+
+ /* Move on to the next object to be updated */
+
+ state = acpi_ut_pop_generic_state (&state_list);
+ }
+
+ return_ACPI_STATUS (AE_OK);
+
+
+error_exit:
+
+ ACPI_REPORT_ERROR (("Could not update object reference count, %s\n",
+ acpi_format_exception (status)));
+
+ return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_add_reference
+ *
+ * PARAMETERS: *Object - Object whose reference count is to be
+ * incremented
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Add one reference to an ACPI object
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_add_reference (
+ union acpi_operand_object *object)
+{
+
+ ACPI_FUNCTION_TRACE_PTR ("ut_add_reference", object);
+
+
+ /* Ensure that we have a valid object */
+
+ if (!acpi_ut_valid_internal_object (object)) {
+ return_VOID;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
+ "Obj %p Current Refs=%X [To Be Incremented]\n",
+ object, object->common.reference_count));
+
+ /* Increment the reference count */
+
+ (void) acpi_ut_update_object_reference (object, REF_INCREMENT);
+ return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_remove_reference
+ *
+ * PARAMETERS: *Object - Object whose ref count will be decremented
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Decrement the reference count of an ACPI internal object
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_remove_reference (
+ union acpi_operand_object *object)
+{
+
+ ACPI_FUNCTION_TRACE_PTR ("ut_remove_reference", object);
+
+
+ /*
+ * Allow a NULL pointer to be passed in, just ignore it. This saves
+ * each caller from having to check. Also, ignore NS nodes.
+ *
+ */
+ if (!object ||
+ (ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED)) {
+ return_VOID;
+ }
+
+ /* Ensure that we have a valid object */
+
+ if (!acpi_ut_valid_internal_object (object)) {
+ return_VOID;
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
+ "Obj %p Current Refs=%X [To Be Decremented]\n",
+ object, object->common.reference_count));
+
+ /*
+ * Decrement the reference count, and only actually delete the object
+ * if the reference count becomes 0. (Must also decrement the ref count
+ * of all subobjects!)
+ */
+ (void) acpi_ut_update_object_reference (object, REF_DECREMENT);
+ return_VOID;
+}
+
+