Commit 3aadd86e authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI: Drop unused ACPI_*_COMPONENT definitions and update documentation 



Drop the definitions of the following symbols:

 ACPI_SBS_COMPONENT
 ACPI_FAN_COMPONENT
 ACPI_CONTAINER_COMPONENT
 ACPI_MEMORY_DEVICE_COMPONENT

that are not used in a meaningful way any more and update the ACPI
debug documentation to avoid confusing users by making the impression
that the ACPICA debug can be used for anything other than ACPICA
itself, which is incorrect.

No functional impact.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: default avatarHanjun Guo <guohanjun@huawei.com>
parent e6a55ccb

Documentation/firmware-guide/acpi/debug.rst

+12 −17
Original line number Diff line number Diff line 
.. SPDX-License-Identifier: GPL-2.0



=================

ACPI Debug Output

=================

====================

ACPI CA Debug Output

====================



The ACPI CA, the Linux ACPI core, and some ACPI drivers can generate debug

output.  This document describes how to use this facility.

The ACPI CA can generate debug output.  This document describes how to use this

facility.



Compile-time configuration

==========================



ACPI debug output is globally enabled by CONFIG_ACPI_DEBUG.  If this config

option is turned off, the debug messages are not even built into the

kernel.

The ACPI CA debug output is globally enabled by CONFIG_ACPI_DEBUG.  If this

config option is not set, the debug messages are not even built into the kernel.



Boot- and run-time configuration

================================
@@ -27,16 +26,16 @@ debug_layer (component) 
=======================



The "debug_layer" is a mask that selects components of interest, e.g., a

specific driver or part of the ACPI interpreter.  To build the debug_layer

bitmask, look for the "#define _COMPONENT" in an ACPI source file.

specific part of the ACPI interpreter.  To build the debug_layer bitmask, look

for the "#define _COMPONENT" in an ACPI source file.



You can set the debug_layer mask at boot-time using the acpi.debug_layer

command line argument, and you can change it after boot by writing values

to /sys/module/acpi/parameters/debug_layer.



The possible components are defined in include/acpi/acoutput.h and

include/acpi/acpi_drivers.h.  Reading /sys/module/acpi/parameters/debug_layer

shows the supported mask values, currently these::

The possible components are defined in include/acpi/acoutput.h.



Reading /sys/module/acpi/parameters/debug_layer shows the supported mask values::



    ACPI_UTILITIES                  0x00000001

    ACPI_HARDWARE                   0x00000002
@@ -52,10 +51,6 @@ shows the supported mask values, currently these:: 
    ACPI_CA_DISASSEMBLER            0x00000800

    ACPI_COMPILER                   0x00001000

    ACPI_TOOLS                      0x00002000

    ACPI_SBS_COMPONENT              0x00100000

    ACPI_FAN_COMPONENT              0x00200000

    ACPI_CONTAINER_COMPONENT        0x01000000

    ACPI_MEMORY_DEVICE_COMPONENT    0x08000000



debug_level

===========

drivers/acpi/sysfs.c

+0 −5
Original line number Diff line number Diff line
@@ -48,11 +48,6 @@ static const struct acpi_dlayer acpi_debug_layers[] = { 
	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),

	ACPI_DEBUG_INIT(ACPI_COMPILER),

	ACPI_DEBUG_INIT(ACPI_TOOLS),



	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),

	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),

	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),

	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),

};



static const struct acpi_dlevel acpi_debug_levels[] = {

include/acpi/acpi_drivers.h

+0 −9
Original line number Diff line number Diff line
@@ -11,15 +11,6 @@ 


#define ACPI_MAX_STRING			80



/*

 * Please update drivers/acpi/debug.c and Documentation/firmware-guide/acpi/debug.rst

 * if you add to this list.

 */

#define ACPI_SBS_COMPONENT		0x00100000

#define ACPI_FAN_COMPONENT		0x00200000

#define ACPI_CONTAINER_COMPONENT	0x01000000

#define ACPI_MEMORY_DEVICE_COMPONENT	0x08000000



/*

 * _HID definitions

 * HIDs must conform to ACPI spec(6.1.4)