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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: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
This commit is contained in:
Rafael J. Wysocki 2021-02-22 20:00:43 +01:00
parent e6a55ccbd5
commit 3aadd86e56
3 changed files with 12 additions and 31 deletions
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29
Documentation/firmware-guide/acpi/debug.rst
View File

@ -1,18 +1,17 @@
.. 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
===========

5
drivers/acpi/sysfs.c
View File

@ -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[] = {

9
include/acpi/acpi_drivers.h
View File

@ -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)