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ACPICA: Add auto-serialization support for ill-behaved control methods.

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This change adds support to automatically mark a control method as
"serialized" if the method creates any named objects. This will
positively prevent the method from being entered by more than one
thread and thus preventing a possible abort when an attempt is
made to create an object twice.

Implemented by parsing all non-serialize control methods at table
load time.

This feature is disabled by default and this patch also adds a new
Linux kernel parameter "acpi_auto_serialize" to allow this feature
to be turned on for a specific boot.

References: https://bugzilla.kernel.org/show_bug.cgi?id=52191
Signed-off-by: Bob Moore <[email protected]>
Signed-off-by: Lv Zheng <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Bob Moore 2014-03-24 14:49:00 +08:00 • committed by Rafael J. Wysocki
commit 22b5afce6a
13 changed files with 252 additions and 25 deletions
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8
Documentation/kernel-parameters.txt
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@ -229,6 +229,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
use by PCI
Format: <irq>,<irq>...
acpi_auto_serialize [HW,ACPI]
Enable auto-serialization of AML methods
AML control methods that contain the opcodes to create
named objects will be marked as "Serialized" by the
auto-serialization feature.
This feature is disabled by default.
This option allows to turn on the feature.
acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
acpica_no_return_repair [HW, ACPI]