[ACPI] ACPICA 20051216

Implemented optional support to allow unresolved names
within ASL Package objects. A null object is inserted in
the package when a named reference cannot be located in
the current namespace. Enabled via the interpreter slack
flag which Linux has enabled by default (acpi=strict
to disable slack).  This should eliminate AE_NOT_FOUND
exceptions seen on machines that contain such code.

Implemented an optimization to the initialization
sequence that can improve boot time. During ACPI device
initialization, the _STA method is now run if and only
if the _INI method exists. The _STA method is used to
determine if the device is present; An _INI can only be
run if _STA returns present, but it is a waste of time to
run the _STA method if the _INI does not exist. (Prototype
and assistance from Dong Wei)

Implemented use of the C99 uintptr_t for the pointer
casting macros if it is available in the current
compiler. Otherwise, the default (void *) cast is used
as before.

Fixed some possible memory leaks found within the
execution path of the Break, Continue, If, and CreateField
operators. (Valery Podrezov)

Fixed a problem introduced in the 20051202 release where
an exception is generated during method execution if a
control method attempts to declare another method.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/acpi/acglobal.h b/include/acpi/acglobal.h
index 3f37560c26ab..dfb3b2493ae5 100644
--- a/include/acpi/acglobal.h
+++ b/include/acpi/acglobal.h
@@ -98,11 +98,15 @@ ACPI_EXTERN u32 acpi_gbl_trace_flags;
 /*
  * Enable "slack" in the AML interpreter?  Default is FALSE, and the
  * interpreter strictly follows the ACPI specification.  Setting to TRUE
- * allows the interpreter to forgive certain bad AML constructs.  Currently:
+ * allows the interpreter to ignore certain errors and/or bad AML constructs.
+ *
+ * Currently, these features are enabled by this flag:
+ *
  * 1) Allow "implicit return" of last value in a control method
- * 2) Allow access beyond end of operation region
+ * 2) Allow access beyond the end of an operation region
  * 3) Allow access to uninitialized locals/args (auto-init to integer 0)
  * 4) Allow ANY object type to be a source operand for the Store() operator
+ * 5) Allow unresolved references (invalid target name) in package objects
  */
 ACPI_EXTERN u8 ACPI_INIT_GLOBAL(acpi_gbl_enable_interpreter_slack, FALSE);