diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2014-03-24 14:48:45 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-26 16:25:59 +0100 |
| commit | e2b8ddcc6b3fbb860e15c5d52455735e128326aa (patch) | |
| tree | bf13dd14aeb07496271de07f7392b470fd6a12be /drivers/acpi/osl.c | |
| parent | 6e596084833b95662dfe90e1f30d83ccbd64575c (diff) | |
| download | linux-e2b8ddcc6b3fbb860e15c5d52455735e128326aa.tar.bz2 | |
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/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 0d7b7145399e..b7af3b758f32 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -1539,18 +1539,6 @@ static int __init osi_setup(char *str) __setup("acpi_osi=", osi_setup); -/* enable serialization to combat AE_ALREADY_EXISTS errors */ -static int __init acpi_serialize_setup(char *str) -{ - printk(KERN_INFO PREFIX "serialize enabled\n"); - - acpi_gbl_all_methods_serialized = TRUE; - - return 1; -} - -__setup("acpi_serialize", acpi_serialize_setup); - /* Check of resource interference between native drivers and ACPI * OperationRegions (SystemIO and System Memory only). * IO ports and memory declared in ACPI might be used by the ACPI subsystem |