Merge branch 'master' of /home/trondmy/kernel/linux-2.6/

Conflicts:

	fs/nfs/inode.c
	fs/super.c

Fix conflicts between patch 'NFS: Split fs/nfs/inode.c' and patch
'VFS: Permit filesystem to override root dentry on mount'

1 files changed, 117 insertions, 367 deletions

diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c
index 19d7b94d40c3..4b0a4a8c9843 100644
--- a/drivers/acpi/namespace/nseval.c
+++ b/drivers/acpi/namespace/nseval.c
@@ -1,7 +1,6 @@
 /*******************************************************************************
  *
- * Module Name: nseval - Object evaluation interfaces -- includes control
- *                       method lookup and execution.
+ * Module Name: nseval - Object evaluation, includes control method execution
  *
  ******************************************************************************/
 
@@ -50,196 +49,14 @@
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nseval")
 
-/* Local prototypes */
-static acpi_status
-acpi_ns_execute_control_method(struct acpi_parameter_info *info);
-
-static acpi_status acpi_ns_get_object_value(struct acpi_parameter_info *info);
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ns_evaluate_relative
- *
- * PARAMETERS:  Pathname        - Name of method to execute, If NULL, the
- *                                handle is the object to execute
- *              Info            - Method info block, contains:
- *                  return_object   - Where to put method's return value (if
- *                                    any).  If NULL, no value is returned.
- *                  Params          - List of parameters to pass to the method,
- *                                    terminated by NULL.  Params itself may be
- *                                    NULL if no parameters are being passed.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Evaluate the object or find and execute the requested method
- *
- * MUTEX:       Locks Namespace
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_evaluate_relative(char *pathname, struct acpi_parameter_info *info)
-{
-        acpi_status status;
-        struct acpi_namespace_node *node = NULL;
-        union acpi_generic_state *scope_info;
-        char *internal_path = NULL;
-
-        ACPI_FUNCTION_TRACE("ns_evaluate_relative");
-
-        /*
-         * Must have a valid object handle
-         */
-        if (!info || !info->node) {
-                return_ACPI_STATUS(AE_BAD_PARAMETER);
-        }
-
-        /* Build an internal name string for the method */
-
-        status = acpi_ns_internalize_name(pathname, &internal_path);
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
-
-        scope_info = acpi_ut_create_generic_state();
-        if (!scope_info) {
-                goto cleanup1;
-        }
-
-        /* Get the prefix handle and Node */
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                goto cleanup;
-        }
-
-        info->node = acpi_ns_map_handle_to_node(info->node);
-        if (!info->node) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-                status = AE_BAD_PARAMETER;
-                goto cleanup;
-        }
-
-        /* Lookup the name in the namespace */
-
-        scope_info->scope.node = info->node;
-        status = acpi_ns_lookup(scope_info, internal_path, ACPI_TYPE_ANY,
-                                ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
-                                &node);
-
-        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-
-        if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "Object [%s] not found [%s]\n",
-                                  pathname, acpi_format_exception(status)));
-                goto cleanup;
-        }
-
-        /*
-         * Now that we have a handle to the object, we can attempt to evaluate it.
-         */
-        ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n",
-                          pathname, node, acpi_ns_get_attached_object(node)));
-
-        info->node = node;
-        status = acpi_ns_evaluate_by_handle(info);
-
-        ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
-                          "*** Completed eval of object %s ***\n", pathname));
-
-      cleanup:
-        acpi_ut_delete_generic_state(scope_info);
-
-      cleanup1:
-        ACPI_MEM_FREE(internal_path);
-        return_ACPI_STATUS(status);
-}
-
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ns_evaluate_by_name
+ * FUNCTION:    acpi_ns_evaluate
  *
- * PARAMETERS:  Pathname        - Fully qualified pathname to the object
- *              Info                - Method info block, contains:
- *                  return_object   - Where to put method's return value (if
- *                                    any).  If NULL, no value is returned.
- *                  Params          - List of parameters to pass to the method,
- *                                    terminated by NULL.  Params itself may be
- *                                    NULL if no parameters are being passed.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Evaluate the object or rind and execute the requested method
- *              passing the given parameters
- *
- * MUTEX:       Locks Namespace
- *
- ******************************************************************************/
-
-acpi_status
-acpi_ns_evaluate_by_name(char *pathname, struct acpi_parameter_info *info)
-{
-        acpi_status status;
-        char *internal_path = NULL;
-
-        ACPI_FUNCTION_TRACE("ns_evaluate_by_name");
-
-        /* Build an internal name string for the method */
-
-        status = acpi_ns_internalize_name(pathname, &internal_path);
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                goto cleanup;
-        }
-
-        /* Lookup the name in the namespace */
-
-        status = acpi_ns_lookup(NULL, internal_path, ACPI_TYPE_ANY,
-                                ACPI_IMODE_EXECUTE, ACPI_NS_NO_UPSEARCH, NULL,
-                                &info->node);
-
-        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-
-        if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
-                                  "Object at [%s] was not found, status=%.4X\n",
-                                  pathname, status));
-                goto cleanup;
-        }
-
-        /*
-         * Now that we have a handle to the object, we can attempt to evaluate it.
-         */
-        ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n",
-                          pathname, info->node,
-                          acpi_ns_get_attached_object(info->node)));
-
-        status = acpi_ns_evaluate_by_handle(info);
-
-        ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
-                          "*** Completed eval of object %s ***\n", pathname));
-
-      cleanup:
-
-        /* Cleanup */
-
-        if (internal_path) {
-                ACPI_MEM_FREE(internal_path);
-        }
-
-        return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ns_evaluate_by_handle
- *
- * PARAMETERS:  Info            - Method info block, contains:
- *                  Node            - Method/Object Node to execute
+ * PARAMETERS:  Info            - Evaluation info block, contains:
+ *                  prefix_node     - Prefix or Method/Object Node to execute
+ *                  Pathname        - Name of method to execute, If NULL, the
+ *                                    Node is the object to execute
  *                  Parameters      - List of parameters to pass to the method,
  *                                    terminated by NULL. Params itself may be
  *                                    NULL if no parameters are being passed.
@@ -248,29 +65,21 @@ acpi_ns_evaluate_by_name(char *pathname, struct acpi_parameter_info *info)
  *                  parameter_type  - Type of Parameter list
  *                  return_object   - Where to put method's return value (if
  *                                    any). If NULL, no value is returned.
+ *                  Flags           - ACPI_IGNORE_RETURN_VALUE to delete return
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Evaluate object or execute the requested method passing the
- *              given parameters
+ * DESCRIPTION: Execute a control method or return the current value of an
+ *              ACPI namespace object.
  *
- * MUTEX:       Locks Namespace
+ * MUTEX:       Locks interpreter
  *
  ******************************************************************************/
-
-acpi_status acpi_ns_evaluate_by_handle(struct acpi_parameter_info *info)
+acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info)
 {
         acpi_status status;
 
-        ACPI_FUNCTION_TRACE("ns_evaluate_by_handle");
-
-        /* Check if namespace has been initialized */
-
-        if (!acpi_gbl_root_node) {
-                return_ACPI_STATUS(AE_NO_NAMESPACE);
-        }
-
-        /* Parameter Validation */
+        ACPI_FUNCTION_TRACE(ns_evaluate);
 
         if (!info) {
                 return_ACPI_STATUS(AE_BAD_PARAMETER);
@@ -280,202 +89,120 @@ acpi_status acpi_ns_evaluate_by_handle(struct acpi_parameter_info *info)
 
         info->return_object = NULL;
 
-        /* Get the prefix handle and Node */
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        /*
+         * Get the actual namespace node for the target object. Handles these cases:
+         *
+         * 1) Null node, Pathname (absolute path)
+         * 2) Node, Pathname (path relative to Node)
+         * 3) Node, Null Pathname
+         */
+        status = acpi_ns_get_node(info->prefix_node, info->pathname,
+                                  ACPI_NS_NO_UPSEARCH, &info->resolved_node);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
 
-        info->node = acpi_ns_map_handle_to_node(info->node);
-        if (!info->node) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-                return_ACPI_STATUS(AE_BAD_PARAMETER);
-        }
-
         /*
          * For a method alias, we must grab the actual method node so that proper
          * scoping context will be established before execution.
          */
-        if (acpi_ns_get_type(info->node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
-                info->node =
+        if (acpi_ns_get_type(info->resolved_node) ==
+            ACPI_TYPE_LOCAL_METHOD_ALIAS) {
+                info->resolved_node =
                     ACPI_CAST_PTR(struct acpi_namespace_node,
-                                  info->node->object);
+                                  info->resolved_node->object);
         }
 
+        ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "%s [%p] Value %p\n", info->pathname,
+                          info->resolved_node,
+                          acpi_ns_get_attached_object(info->resolved_node)));
+
         /*
          * Two major cases here:
-         * 1) The object is an actual control method -- execute it.
-         * 2) The object is not a method -- just return it's current value
          *
-         * In both cases, the namespace is unlocked by the acpi_ns* procedure
+         * 1) The object is a control method -- execute it
+         * 2) The object is not a method -- just return it's current value
          */
-        if (acpi_ns_get_type(info->node) == ACPI_TYPE_METHOD) {
-                /*
-                 * Case 1) We have an actual control method to execute
-                 */
-                status = acpi_ns_execute_control_method(info);
-        } else {
+        if (acpi_ns_get_type(info->resolved_node) == ACPI_TYPE_METHOD) {
                 /*
-                 * Case 2) Object is NOT a method, just return its current value
+                 * 1) Object is a control method - execute it
                  */
-                status = acpi_ns_get_object_value(info);
-        }
-
-        /*
-         * Check if there is a return value on the stack that must be dealt with
-         */
-        if (status == AE_CTRL_RETURN_VALUE) {
-                /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
-
-                status = AE_OK;
-        }
-
-        /*
-         * Namespace was unlocked by the handling acpi_ns* function, so we
-         * just return
-         */
-        return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ns_execute_control_method
- *
- * PARAMETERS:  Info            - Method info block, contains:
- *                  Node            - Method Node to execute
- *                  obj_desc        - Method object
- *                  Parameters      - List of parameters to pass to the method,
- *                                    terminated by NULL. Params itself may be
- *                                    NULL if no parameters are being passed.
- *                  return_object   - Where to put method's return value (if
- *                                    any). If NULL, no value is returned.
- *                  parameter_type  - Type of Parameter list
- *                  return_object   - Where to put method's return value (if
- *                                    any). If NULL, no value is returned.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Execute the requested method passing the given parameters
- *
- * MUTEX:       Assumes namespace is locked
- *
- ******************************************************************************/
-
-static acpi_status
-acpi_ns_execute_control_method(struct acpi_parameter_info *info)
-{
-        acpi_status status;
-
-        ACPI_FUNCTION_TRACE("ns_execute_control_method");
-
-        /* Verify that there is a method associated with this object */
-
-        info->obj_desc = acpi_ns_get_attached_object(info->node);
-        if (!info->obj_desc) {
-                ACPI_ERROR((AE_INFO, "No attached method object"));
 
-                (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-                return_ACPI_STATUS(AE_NULL_OBJECT);
-        }
-
-        ACPI_DUMP_PATHNAME(info->node, "Execute Method:",
-                           ACPI_LV_INFO, _COMPONENT);
-
-        ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Method at AML address %p Length %X\n",
-                          info->obj_desc->method.aml_start + 1,
-                          info->obj_desc->method.aml_length - 1));
-
-        /*
-         * Unlock the namespace before execution.  This allows namespace access
-         * via the external Acpi* interfaces while a method is being executed.
-         * However, any namespace deletion must acquire both the namespace and
-         * interpreter locks to ensure that no thread is using the portion of the
-         * namespace that is being deleted.
-         */
-        status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
+                /* Verify that there is a method object associated with this node */
 
-        /*
-         * Execute the method via the interpreter.  The interpreter is locked
-         * here before calling into the AML parser
-         */
-        status = acpi_ex_enter_interpreter();
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
+                info->obj_desc =
+                    acpi_ns_get_attached_object(info->resolved_node);
+                if (!info->obj_desc) {
+                        ACPI_ERROR((AE_INFO,
+                                    "Control method has no attached sub-object"));
+                        return_ACPI_STATUS(AE_NULL_OBJECT);
+                }
 
-        status = acpi_ps_execute_method(info);
-        acpi_ex_exit_interpreter();
+                ACPI_DUMP_PATHNAME(info->resolved_node, "Execute Method:",
+                                   ACPI_LV_INFO, _COMPONENT);
 
-        return_ACPI_STATUS(status);
-}
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "Method at AML address %p Length %X\n",
+                                  info->obj_desc->method.aml_start + 1,
+                                  info->obj_desc->method.aml_length - 1));
 
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ns_get_object_value
- *
- * PARAMETERS:  Info            - Method info block, contains:
- *                  Node            - Object's NS node
- *                  return_object   - Where to put object value (if
- *                                    any). If NULL, no value is returned.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Return the current value of the object
- *
- * MUTEX:       Assumes namespace is locked, leaves namespace unlocked
- *
- ******************************************************************************/
+                /*
+                 * Any namespace deletion must acquire both the namespace and
+                 * interpreter locks to ensure that no thread is using the portion of
+                 * the namespace that is being deleted.
+                 *
+                 * Execute the method via the interpreter. The interpreter is locked
+                 * here before calling into the AML parser
+                 */
+                status = acpi_ex_enter_interpreter();
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
 
-static acpi_status acpi_ns_get_object_value(struct acpi_parameter_info *info)
-{
-        acpi_status status = AE_OK;
-        struct acpi_namespace_node *resolved_node = info->node;
+                status = acpi_ps_execute_method(info);
+                acpi_ex_exit_interpreter();
+        } else {
+                /*
+                 * 2) Object is not a method, return its current value
+                 */
 
-        ACPI_FUNCTION_TRACE("ns_get_object_value");
+                /*
+                 * Objects require additional resolution steps (e.g., the Node may be
+                 * a field that must be read, etc.) -- we can't just grab the object
+                 * out of the node.
+                 *
+                 * Use resolve_node_to_value() to get the associated value.
+                 *
+                 * NOTE: we can get away with passing in NULL for a walk state because
+                 * resolved_node is guaranteed to not be a reference to either a method
+                 * local or a method argument (because this interface is never called
+                 * from a running method.)
+                 *
+                 * Even though we do not directly invoke the interpreter for object
+                 * resolution, we must lock it because we could access an opregion.
+                 * The opregion access code assumes that the interpreter is locked.
+                 */
+                status = acpi_ex_enter_interpreter();
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
 
-        /*
-         * Objects require additional resolution steps (e.g., the Node may be a
-         * field that must be read, etc.) -- we can't just grab the object out of
-         * the node.
-         */
+                /* Function has a strange interface */
 
-        /*
-         * Use resolve_node_to_value() to get the associated value. This call always
-         * deletes obj_desc (allocated above).
-         *
-         * NOTE: we can get away with passing in NULL for a walk state because
-         * obj_desc is guaranteed to not be a reference to either a method local or
-         * a method argument (because this interface can only be called from the
-         * acpi_evaluate external interface, never called from a running method.)
-         *
-         * Even though we do not directly invoke the interpreter for this, we must
-         * enter it because we could access an opregion. The opregion access code
-         * assumes that the interpreter is locked.
-         *
-         * We must release the namespace lock before entering the intepreter.
-         */
-        status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                return_ACPI_STATUS(status);
-        }
+                status =
+                    acpi_ex_resolve_node_to_value(&info->resolved_node, NULL);
+                acpi_ex_exit_interpreter();
 
-        status = acpi_ex_enter_interpreter();
-        if (ACPI_SUCCESS(status)) {
-                status = acpi_ex_resolve_node_to_value(&resolved_node, NULL);
                 /*
                  * If acpi_ex_resolve_node_to_value() succeeded, the return value was placed
                  * in resolved_node.
                  */
-                acpi_ex_exit_interpreter();
-
                 if (ACPI_SUCCESS(status)) {
                         status = AE_CTRL_RETURN_VALUE;
-                        info->return_object = ACPI_CAST_PTR
-                            (union acpi_operand_object, resolved_node);
+                        info->return_object =
+                            ACPI_CAST_PTR(union acpi_operand_object,
+                                          info->resolved_node);
+
                         ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
                                           "Returning object %p [%s]\n",
                                           info->return_object,
@@ -484,7 +211,30 @@ static acpi_status acpi_ns_get_object_value(struct acpi_parameter_info *info)
                 }
         }
 
-        /* Namespace is unlocked */
+        /*
+         * Check if there is a return value that must be dealt with
+         */
+        if (status == AE_CTRL_RETURN_VALUE) {
+
+                /* If caller does not want the return value, delete it */
 
+                if (info->flags & ACPI_IGNORE_RETURN_VALUE) {
+                        acpi_ut_remove_reference(info->return_object);
+                        info->return_object = NULL;
+                }
+
+                /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */
+
+                status = AE_OK;
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
+                          "*** Completed evaluation of object %s ***\n",
+                          info->pathname));
+
+        /*
+         * Namespace was unlocked by the handling acpi_ns* function, so we
+         * just return
+         */
         return_ACPI_STATUS(status);
 }