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authorLv Zheng <lv.zheng@intel.com>2014-03-24 10:48:45 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-03-26 19:25:59 +0400
commite2b8ddcc6b3fbb860e15c5d52455735e128326aa (patch)
treebf13dd14aeb07496271de07f7392b470fd6a12be /drivers/acpi/acpica/acglobal.h
parent6e596084833b95662dfe90e1f30d83ccbd64575c (diff)
downloadlinux-e2b8ddcc6b3fbb860e15c5d52455735e128326aa.tar.xz
ACPICA: Remove global option to serialize all control methods.
According to the reports, the "acpi_serialize" mechanism is broken as: A. The parallel method calls can still happen when the interpreter lock is released under the following conditions: 1. External callbacks are invoked, for example, by the region handlers, the exception handlers, etc.; 2. Module level execution is performed when Load/LoadTable opcodes are executed, and 3. The _REG control methods are invoked to complete the region registrations. B. For the following situations, the interpreter lock need to be released even for a serialized method while currently, the lock-releasing operation is marked as a no-op by acpi_ex_relinquish/reacquire_interpreter() when this mechanism is enabled: 1. Wait opcode is executed, 2. Acquire opcode is executed, and 3. Sleep opcode is executed. This patch removes this mechanism and the internal acpi_ex_relinquish/reacquire_interpreter() APIs. Lv Zheng. References: https://bugzilla.kernel.org/show_bug.cgi?id=52191 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>
Diffstat (limited to 'drivers/acpi/acpica/acglobal.h')
-rw-r--r--drivers/acpi/acpica/acglobal.h8
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 8f40bb972ae3..767556cb1448 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -93,14 +93,6 @@
ACPI_INIT_GLOBAL(u8, acpi_gbl_enable_interpreter_slack, FALSE);
/*
- * Automatically serialize ALL control methods? Default is FALSE, meaning
- * to use the Serialized/not_serialized method flags on a per method basis.
- * Only change this if the ASL code is poorly written and cannot handle
- * reentrancy even though methods are marked "NotSerialized".
- */
-ACPI_INIT_GLOBAL(u8, acpi_gbl_all_methods_serialized, FALSE);
-
-/*
* Create the predefined _OSI method in the namespace? Default is TRUE
* because ACPI CA is fully compatible with other ACPI implementations.
* Changing this will revert ACPI CA (and machine ASL) to pre-OSI behavior.