diff options
| author | Bob Moore <robert.moore@intel.com> | 2007-02-02 19:48:20 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-02-03 05:14:24 +0300 |
| commit | 1ba753acb372c2955a4843302e92e49ce82e2fea (patch) | |
| tree | 13dbe3af585f835c7d9cdf41fae505a7df4e8620 /drivers/acpi/namespace | |
| parent | 95befdb398e0112ede80529f6770644ecfa5a82e (diff) | |
| download | linux-1ba753acb372c2955a4843302e92e49ce82e2fea.tar.xz | |
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.c | 11 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsinit.c | 7 | ||||
| -rw-r--r-- | drivers/acpi/namespace/nsxfeval.c | 11 |
3 files changed, 8 insertions, 21 deletions
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c index 4b0a4a8c9843..71566161ac83 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 aec8488c0019..0d3a42bf2f15 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 dca6799ac678..6a0a46eda9a2 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: |