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authorBob Moore <robert.moore@intel.com>2007-02-02 19:48:20 +0300
committerLen Brown <len.brown@intel.com>2007-02-02 21:14:24 -0500
commit1ba753acb372c2955a4843302e92e49ce82e2fea (patch)
tree13dbe3af585f835c7d9cdf41fae505a7df4e8620 /drivers/acpi/namespace
parent95befdb398e0112ede80529f6770644ecfa5a82e (diff)
downloadop-kernel-dev-1ba753acb372c2955a4843302e92e49ce82e2fea.zip
op-kernel-dev-1ba753acb372c2955a4843302e92e49ce82e2fea.tar.gz
ACPICA: Re-implement interpreters' "serialized mode"
Enhanced the implementation of the interpreters' serialized mode (boot with "acpi_serialize" to set acpi_glb_all_methods_serialized flag.) When this mode is specified, instead of creating a serialization semaphore per control method, the interpreter lock is simply no longer released before a blocking operation during control method execution. This effectively makes the AML Interpreter single-threaded. The overhead of a semaphore per-method is eliminated. Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/namespace')
-rw-r--r--drivers/acpi/namespace/nseval.c11
-rw-r--r--drivers/acpi/namespace/nsinit.c7
-rw-r--r--drivers/acpi/namespace/nsxfeval.c11
3 files changed, 8 insertions, 21 deletions
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c
index 4b0a4a8..7156616 100644
--- a/drivers/acpi/namespace/nseval.c
+++ b/drivers/acpi/namespace/nseval.c
@@ -154,11 +154,7 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info)
* Execute the method via the interpreter. The interpreter is locked
* here before calling into the AML parser
*/
- status = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
-
+ acpi_ex_enter_interpreter();
status = acpi_ps_execute_method(info);
acpi_ex_exit_interpreter();
} else {
@@ -182,10 +178,7 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info)
* resolution, we must lock it because we could access an opregion.
* The opregion access code assumes that the interpreter is locked.
*/
- status = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ acpi_ex_enter_interpreter();
/* Function has a strange interface */
diff --git a/drivers/acpi/namespace/nsinit.c b/drivers/acpi/namespace/nsinit.c
index aec8488..0d3a42b 100644
--- a/drivers/acpi/namespace/nsinit.c
+++ b/drivers/acpi/namespace/nsinit.c
@@ -213,7 +213,7 @@ acpi_ns_init_one_object(acpi_handle obj_handle,
u32 level, void *context, void **return_value)
{
acpi_object_type type;
- acpi_status status;
+ acpi_status status = AE_OK;
struct acpi_init_walk_info *info =
(struct acpi_init_walk_info *)context;
struct acpi_namespace_node *node =
@@ -267,10 +267,7 @@ acpi_ns_init_one_object(acpi_handle obj_handle,
/*
* Must lock the interpreter before executing AML code
*/
- status = acpi_ex_enter_interpreter();
- if (ACPI_FAILURE(status)) {
- return (status);
- }
+ acpi_ex_enter_interpreter();
/*
* Each of these types can contain executable AML code within the
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index dca6799..6a0a46e 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -170,7 +170,6 @@ acpi_evaluate_object(acpi_handle handle,
struct acpi_buffer *return_buffer)
{
acpi_status status;
- acpi_status status2;
struct acpi_evaluate_info *info;
acpi_size buffer_space_needed;
u32 i;
@@ -329,14 +328,12 @@ acpi_evaluate_object(acpi_handle handle,
* Delete the internal return object. NOTE: Interpreter must be
* locked to avoid race condition.
*/
- status2 = acpi_ex_enter_interpreter();
- if (ACPI_SUCCESS(status2)) {
+ acpi_ex_enter_interpreter();
- /* Remove one reference on the return object (should delete it) */
+ /* Remove one reference on the return object (should delete it) */
- acpi_ut_remove_reference(info->return_object);
- acpi_ex_exit_interpreter();
- }
+ acpi_ut_remove_reference(info->return_object);
+ acpi_ex_exit_interpreter();
}
cleanup:
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