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ACPICA: Executer: Add interpreter tracing mode for method tracing facility 

ACPICA commit 07fffd02607685b655ed92ee15c160e6a810b60b

The acpi_debug_trace() is the mechanism known as ACPI method tracing that is
used by Linux as ACPICA debugging message reducer. This facility can be
controlled through Linux ACPI subsystem - /sys/module/acpi/parameters.
This facility requires CONFIG_ACPI_DEBUG to be enabled to see ACPICA trace
logs in the kernel dmesg output.

This patch enhances acpi_debug_trace() to make it not only a message reducer,
but a real tracer to trace AML interpreter execution. Note that in addition
to the AML tracer enabling, this patch also updates the facility with the
following enhancements:
1. Allow a full path to be specified by the acpi_debug_trace() API.
2. Allow any method rather than just the entrance of acpi_evaluate_object()
   to be traced.
3. All interpreter ACPI_LV_TRACE_POINT messages are collected for
   ACPI_EXECUTER layer.

The Makefile of drivers/acpi/acpica is also updated to include exdebug.o
and the duplicated stubs are removed after that.

Note that since this patch has enhanced the method tracing facility, Linux
need also be updated after applying this patch. Lv Zheng.

Link: https://github.com/acpica/acpica/commit/07fffd02
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lv Zheng 2015-07-23 12:52:59 +08:00 committed by Rafael J. Wysocki
parent a616dc2fe5
commit ab6c573320
12 changed files with 327 additions and 185 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/acpica/acdebug.h
View File

@ -102,6 +102,8 @@ void acpi_db_display_interfaces(char *action_arg, char *interface_name_arg);
acpi_status acpi_db_sleep(char *object_arg);
void acpi_db_trace(char *enable_arg, char *method_arg, char *once_arg);
void acpi_db_display_locks(void);
void acpi_db_display_resources(char *object_arg);

2
drivers/acpi/acpica/acglobal.h
View File

@ -290,8 +290,6 @@ ACPI_GLOBAL(u32, acpi_fixed_event_count[ACPI_NUM_FIXED_EVENTS]);
ACPI_GLOBAL(u32, acpi_gbl_original_dbg_level);
ACPI_GLOBAL(u32, acpi_gbl_original_dbg_layer);
ACPI_GLOBAL(u32, acpi_gbl_trace_dbg_level);
ACPI_GLOBAL(u32, acpi_gbl_trace_dbg_layer);
/*****************************************************************************
*

18
drivers/acpi/acpica/acinterp.h
View File

@ -131,6 +131,24 @@ void
acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
u32 level, u32 index);
void
acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state);
void
acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state);
void
acpi_ex_start_trace_opcode(union acpi_parse_object *op,
struct acpi_walk_state *walk_state);
void
acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
struct acpi_walk_state *walk_state);
/*
* exfield - ACPI AML (p-code) execution - field manipulation
*/

25
drivers/acpi/acpica/dsdebug.c
View File

@ -48,6 +48,7 @@
#ifdef ACPI_DISASSEMBLER
#include "acdisasm.h"
#endif
#include "acinterp.h"
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dsdebug")
@ -128,7 +129,6 @@ acpi_ds_dump_method_stack(acpi_status status,
struct acpi_walk_state *next_walk_state;
struct acpi_namespace_node *previous_method = NULL;
union acpi_operand_object *method_desc;
char *pathname = NULL;
ACPI_FUNCTION_TRACE(ds_dump_method_stack);
@ -173,25 +173,10 @@ acpi_ds_dump_method_stack(acpi_status status,
while (next_walk_state) {
method_desc = next_walk_state->method_desc;
if (method_desc && method_desc->method.node) {
pathname = acpi_ns_get_normalized_pathname((struct
acpi_namespace_node
*)
method_desc->
method.node,
TRUE);
}
if (pathname) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p:%s] execution.\n",
method_desc->method.aml_start,
pathname));
ACPI_FREE(pathname);
pathname = NULL;
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p] execution.\n",
method_desc->method.aml_start));
if (method_desc) {
acpi_ex_stop_trace_method((struct acpi_namespace_node *)
method_desc->method.node,
method_desc, walk_state);
}
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

32
drivers/acpi/acpica/dsmethod.c
View File

@ -327,7 +327,6 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
struct acpi_walk_state *walk_state)
{
acpi_status status = AE_OK;
char *pathname = NULL;
ACPI_FUNCTION_TRACE_PTR(ds_begin_method_execution, method_node);
@ -335,17 +334,7 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
return_ACPI_STATUS(AE_NULL_ENTRY);
}
pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
if (pathname) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin method [0x%p:%s] execution.\n",
obj_desc->method.aml_start, pathname));
ACPI_FREE(pathname);
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin method [0x%p] execution.\n",
obj_desc->method.aml_start));
}
acpi_ex_start_trace_method(method_node, obj_desc, walk_state);
/* Prevent wraparound of thread count */
@ -708,7 +697,6 @@ void
acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
struct acpi_walk_state *walk_state)
{
char *pathname = NULL;
ACPI_FUNCTION_TRACE_PTR(ds_terminate_control_method, walk_state);
@ -846,22 +834,8 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
}
}
if (method_desc->method.node) {
pathname = acpi_ns_get_normalized_pathname((struct
acpi_namespace_node
*)method_desc->
method.node, TRUE);
}
if (pathname) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p:%s] execution.\n",
method_desc->method.aml_start, pathname));
ACPI_FREE(pathname);
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p] execution.\n",
method_desc->method.aml_start));
}
acpi_ex_stop_trace_method((struct acpi_namespace_node *)method_desc->
method.node, method_desc, walk_state);
return_VOID;
}

271
drivers/acpi/acpica/exdebug.c
View File

@ -43,11 +43,15 @@
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "acparser.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exdebug")
static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;
#ifndef ACPI_NO_ERROR_MESSAGES
/*******************************************************************************
*
@ -70,6 +74,7 @@ ACPI_MODULE_NAME("exdebug")
* enabled if necessary.
*
******************************************************************************/
void
acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
u32 level, u32 index)
@ -308,3 +313,269 @@ acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
return_VOID;
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_ex_interpreter_trace_enabled
*
* PARAMETERS: name - Whether method name should be matched,
* this should be checked before starting
* the tracer
*
* RETURN: TRUE if interpreter trace is enabled.
*
* DESCRIPTION: Check whether interpreter trace is enabled
*
******************************************************************************/
static u8 acpi_ex_interpreter_trace_enabled(char *name)
{
/* Check if tracing is enabled */
if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
return (FALSE);
}
/*
* Check if tracing is filtered:
*
* 1. If the tracer is started, acpi_gbl_trace_method_object should have
* been filled by the trace starter
* 2. If the tracer is not started, acpi_gbl_trace_method_name should be
* matched if it is specified
* 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
* not be cleared by the trace stopper during the first match
*/
if (acpi_gbl_trace_method_object) {
return (TRUE);
}
if (name &&
(acpi_gbl_trace_method_name &&
strcmp(acpi_gbl_trace_method_name, name))) {
return (FALSE);
}
if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
!acpi_gbl_trace_method_name) {
return (FALSE);
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_start_trace_method
*
* PARAMETERS: method_node - Node of the method
* obj_desc - The method object
* walk_state - current state, NULL if not yet executing
* a method.
*
* RETURN: None
*
* DESCRIPTION: Start control method execution trace
*
******************************************************************************/
void
acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
acpi_status status;
char *pathname = NULL;
u8 enabled = FALSE;
ACPI_FUNCTION_NAME(ex_start_trace_method);
if (method_node) {
pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
goto exit;
}
enabled = acpi_ex_interpreter_trace_enabled(pathname);
if (enabled && !acpi_gbl_trace_method_object) {
acpi_gbl_trace_method_object = obj_desc;
acpi_gbl_original_dbg_level = acpi_dbg_level;
acpi_gbl_original_dbg_layer = acpi_dbg_layer;
acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;
if (acpi_gbl_trace_dbg_level) {
acpi_dbg_level = acpi_gbl_trace_dbg_level;
}
if (acpi_gbl_trace_dbg_layer) {
acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
}
}
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
exit:
if (enabled) {
if (pathname) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin method [0x%p:%s] execution.\n",
obj_desc->method.aml_start,
pathname));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin method [0x%p] execution.\n",
obj_desc->method.aml_start));
}
}
if (pathname) {
ACPI_FREE(pathname);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_stop_trace_method
*
* PARAMETERS: method_node - Node of the method
* obj_desc - The method object
* walk_state - current state, NULL if not yet executing
* a method.
*
* RETURN: None
*
* DESCRIPTION: Stop control method execution trace
*
******************************************************************************/
void
acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
acpi_status status;
char *pathname = NULL;
u8 enabled;
ACPI_FUNCTION_NAME(ex_stop_trace_method);
if (method_node) {
pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
goto exit_path;
}
enabled = acpi_ex_interpreter_trace_enabled(NULL);
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
if (enabled) {
if (pathname) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p:%s] execution.\n",
obj_desc->method.aml_start,
pathname));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End method [0x%p] execution.\n",
obj_desc->method.aml_start));
}
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
goto exit_path;
}
/* Check whether the tracer should be stopped */
if (acpi_gbl_trace_method_object == obj_desc) {
/* Disable further tracing if type is one-shot */
if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
acpi_gbl_trace_method_name = NULL;
}
acpi_dbg_level = acpi_gbl_original_dbg_level;
acpi_dbg_layer = acpi_gbl_original_dbg_layer;
acpi_gbl_trace_method_object = NULL;
}
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
exit_path:
if (pathname) {
ACPI_FREE(pathname);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_start_trace_opcode
*
* PARAMETERS: op - The parser opcode object
* walk_state - current state, NULL if not yet executing
* a method.
*
* RETURN: None
*
* DESCRIPTION: Start opcode execution trace
*
******************************************************************************/
void
acpi_ex_start_trace_opcode(union acpi_parse_object *op,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_NAME(ex_start_trace_opcode);
if (acpi_ex_interpreter_trace_enabled(NULL)) {
if (walk_state->op_info) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin opcode: %s[0x%p] Class=0x%02x, Type=0x%02x, Flags=0x%04x.\n",
op->common.aml_op_name,
op->common.aml,
walk_state->op_info->class,
walk_state->op_info->type,
walk_state->op_info->flags));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin opcode: %s[0x%p].\n",
op->common.aml_op_name,
op->common.aml));
}
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_stop_trace_opcode
*
* PARAMETERS: op - The parser opcode object
* walk_state - current state, NULL if not yet executing
* a method.
*
* RETURN: None
*
* DESCRIPTION: Stop opcode execution trace
*
******************************************************************************/
void
acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_NAME(ex_stop_trace_opcode);
if (acpi_ex_interpreter_trace_enabled(NULL)) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End opcode: %s[0x%p].\n",
op->common.aml_op_name, op->common.aml));
}
}

16
drivers/acpi/acpica/psloop.c
View File

@ -51,6 +51,7 @@
#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"
#include "acparser.h"
#include "acdispat.h"
#include "amlcode.h"
@ -498,20 +499,7 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state)
op->common.aml));
}
if (walk_state->op_info) {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin opcode: %s[0x%p] Class=0x%02x, Type=0x%02x, Flags=0x%04x.\n",
op->common.aml_op_name,
op->common.aml,
walk_state->op_info->class,
walk_state->op_info->type,
walk_state->op_info->flags));
} else {
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"Begin opcode: %s[0x%p].\n",
op->common.aml_op_name,
op->common.aml));
}
acpi_ex_start_trace_opcode(op, walk_state);
}
/*

4
drivers/acpi/acpica/psparse.c
View File

@ -147,9 +147,7 @@ acpi_ps_complete_this_op(struct acpi_walk_state * walk_state,
return_ACPI_STATUS(AE_OK); /* OK for now */
}
ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
"End opcode: %s[0x%p].\n",
op->common.aml_op_name, op->common.aml));
acpi_ex_stop_trace_opcode(op, walk_state);
/* Delete this op and the subtree below it if asked to */

121
drivers/acpi/acpica/psxface.c
View File

@ -47,15 +47,12 @@
#include "acdispat.h"
#include "acinterp.h"
#include "actables.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME("psxface")
/* Local Prototypes */
static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
@ -76,7 +73,7 @@ acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
******************************************************************************/
acpi_status
acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags)
{
acpi_status status;
@ -85,108 +82,14 @@ acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
return (status);
}
/* TBDs: Validate name, allow full path or just nameseg */
acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
acpi_gbl_trace_method_name = name;
acpi_gbl_trace_flags = flags;
if (debug_level) {
acpi_gbl_trace_dbg_level = debug_level;
}
if (debug_layer) {
acpi_gbl_trace_dbg_layer = debug_layer;
}
acpi_gbl_trace_dbg_level = debug_level;
acpi_gbl_trace_dbg_layer = debug_layer;
status = AE_OK;
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_start_trace
*
* PARAMETERS: info - Method info struct
*
* RETURN: None
*
* DESCRIPTION: Start control method execution trace
*
******************************************************************************/
static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
{
acpi_status status;
ACPI_FUNCTION_ENTRY();
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return;
}
if ((!acpi_gbl_trace_method_name) ||
(acpi_gbl_trace_method_name != info->node->name.integer)) {
goto exit;
}
acpi_gbl_original_dbg_level = acpi_dbg_level;
acpi_gbl_original_dbg_layer = acpi_dbg_layer;
acpi_dbg_level = 0x00FFFFFF;
acpi_dbg_layer = ACPI_UINT32_MAX;
if (acpi_gbl_trace_dbg_level) {
acpi_dbg_level = acpi_gbl_trace_dbg_level;
}
if (acpi_gbl_trace_dbg_layer) {
acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
}
exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_stop_trace
*
* PARAMETERS: info - Method info struct
*
* RETURN: None
*
* DESCRIPTION: Stop control method execution trace
*
******************************************************************************/
static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
{
acpi_status status;
ACPI_FUNCTION_ENTRY();
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return;
}
if ((!acpi_gbl_trace_method_name) ||
(acpi_gbl_trace_method_name != info->node->name.integer)) {
goto exit;
}
/* Disable further tracing if type is one-shot */
if (acpi_gbl_trace_flags & 1) {
acpi_gbl_trace_method_name = 0;
acpi_gbl_trace_dbg_level = 0;
acpi_gbl_trace_dbg_layer = 0;
}
acpi_dbg_level = acpi_gbl_original_dbg_level;
acpi_dbg_layer = acpi_gbl_original_dbg_layer;
exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (status);
}
/*******************************************************************************
@ -212,7 +115,7 @@ exit:
*
******************************************************************************/
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
acpi_status acpi_ps_execute_method(struct acpi_evaluate_info * info)
{
acpi_status status;
union acpi_parse_object *op;
@ -243,10 +146,6 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
*/
acpi_ps_update_parameter_list(info, REF_INCREMENT);
/* Begin tracing if requested */
acpi_ps_start_trace(info);
/*
* Execute the method. Performs parse simultaneously
*/
@ -326,10 +225,6 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
cleanup:
acpi_ps_delete_parse_tree(op);
/* End optional tracing */
acpi_ps_stop_trace(info);
/* Take away the extra reference that we gave the parameters above */
acpi_ps_update_parameter_list(info, REF_DECREMENT);

2
drivers/acpi/acpica/utinit.c
View File

@ -204,8 +204,6 @@ acpi_status acpi_ut_init_globals(void)
acpi_gbl_acpi_hardware_present = TRUE;
acpi_gbl_last_owner_id_index = 0;
acpi_gbl_next_owner_id_offset = 0;
acpi_gbl_trace_dbg_level = 0;
acpi_gbl_trace_dbg_layer = 0;
acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
acpi_gbl_osi_mutex = NULL;
acpi_gbl_reg_methods_executed = FALSE;

13
include/acpi/acoutput.h
View File

@ -184,6 +184,19 @@
#define ACPI_NORMAL_DEFAULT (ACPI_LV_INIT | ACPI_LV_DEBUG_OBJECT | ACPI_LV_REPAIR)
#define ACPI_DEBUG_ALL (ACPI_LV_AML_DISASSEMBLE | ACPI_LV_ALL_EXCEPTIONS | ACPI_LV_ALL)
/*
* Global trace flags
*/
#define ACPI_TRACE_ENABLED ((u32) 2)
#define ACPI_TRACE_ONESHOT ((u32) 1)
/* Defaults for trace debugging level/layer */
#define ACPI_TRACE_LEVEL_ALL ACPI_LV_ALL
#define ACPI_TRACE_LAYER_ALL 0x000001FF
#define ACPI_TRACE_LEVEL_DEFAULT ACPI_LV_TRACE_POINT
#define ACPI_TRACE_LAYER_DEFAULT ACPI_EXECUTER
#if defined (ACPI_DEBUG_OUTPUT) || !defined (ACPI_NO_ERROR_MESSAGES)
/*
* The module name is used primarily for error and debug messages.

6
include/acpi/acpixf.h
View File

@ -251,7 +251,9 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_reduced_hardware, FALSE);
* traced each time it is executed.
*/
ACPI_INIT_GLOBAL(u32, acpi_gbl_trace_flags, 0);
ACPI_INIT_GLOBAL(acpi_name, acpi_gbl_trace_method_name, 0);
ACPI_INIT_GLOBAL(const char *, acpi_gbl_trace_method_name, NULL);
ACPI_INIT_GLOBAL(u32, acpi_gbl_trace_dbg_level, ACPI_TRACE_LEVEL_DEFAULT);
ACPI_INIT_GLOBAL(u32, acpi_gbl_trace_dbg_layer, ACPI_TRACE_LAYER_DEFAULT);
/*
* Runtime configuration of debug output control masks. We want the debug
@ -504,7 +506,7 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_object_handler handler,
void **data))
ACPI_EXTERNAL_RETURN_STATUS(acpi_status
acpi_debug_trace(char *name, u32 debug_level,
acpi_debug_trace(const char *name, u32 debug_level,
u32 debug_layer, u32 flags))
/*