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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-02-22 22:00:43 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-03-08 18:55:28 +0300
commit3aadd86e5669f6bdb7c082e06c0ffadb4f987375 (patch)
treeeea50d221ce2449da46c723d51cc453eea1e5f5b /Documentation/firmware-guide
parente6a55ccbd5647fcb44a6389682e8f522998a5773 (diff)
downloadlinux-3aadd86e5669f6bdb7c082e06c0ffadb4f987375.tar.xz
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>
Diffstat (limited to 'Documentation/firmware-guide')
-rw-r--r--Documentation/firmware-guide/acpi/debug.rst29
1 files changed, 12 insertions, 17 deletions
diff --git a/Documentation/firmware-guide/acpi/debug.rst b/Documentation/firmware-guide/acpi/debug.rst
index 6a6961c9d98a..0639c9de07f9 100644
--- a/Documentation/firmware-guide/acpi/debug.rst
+++ b/Documentation/firmware-guide/acpi/debug.rst
@@ -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
===========