ACPI: ACPICA 20060623

Implemented a new acpi_spinlock type for the OSL lock
interfaces.  This allows the type to be customized to
the host OS for improved efficiency (since a spinlock is
usually a very small object.)

Implemented support for "ignored" bits in the ACPI
registers.  According to the ACPI specification, these
bits should be preserved when writing the registers via
a read/modify/write cycle. There are 3 bits preserved
in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9],
and PM1_STATUS[11].
http://bugzilla.kernel.org/show_bug.cgi?id=3691

Implemented the initial deployment of new OSL mutex
interfaces.  Since some host operating systems have
separate mutex and semaphore objects, this feature was
requested. The base code now uses mutexes (and the new
mutex interfaces) wherever a binary semaphore was used
previously. However, for the current release, the mutex
interfaces are defined as macros to map them to the
existing semaphore interfaces.

Fixed several problems with the support for the control
method SyncLevel parameter. The SyncLevel now works
according to the ACPI specification and in concert with the
Mutex SyncLevel parameter, since the current SyncLevel is
a property of the executing thread. Mutual exclusion for
control methods is now implemented with a mutex instead
of a semaphore.

Fixed three instances of the use of the C shift operator
in the bitfield support code (exfldio.c) to avoid the use
of a shift value larger than the target data width. The
behavior of C compilers is undefined in this case and can
cause unpredictable results, and therefore the case must
be detected and avoided.  (Fiodor Suietov)

Added an info message whenever an SSDT or OEM table
is loaded dynamically via the Load() or LoadTable()
ASL operators. This should improve debugging capability
since it will show exactly what tables have been loaded
(beyond the tables present in the RSDT/XSDT.)

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

1 files changed, 4 insertions, 4 deletions

diff --git a/include/acpi/acobject.h b/include/acpi/acobject.h
index 1747d94084d8..8fdee31119f3 100644
--- a/include/acpi/acobject.h
+++ b/include/acpi/acobject.h
@@ -140,14 +140,14 @@ struct acpi_object_package {
  *****************************************************************************/
 
 struct acpi_object_event {
-        ACPI_OBJECT_COMMON_HEADER void *semaphore;
+        ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 };
 
 struct acpi_object_mutex {
         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
-        void *semaphore;        /* Actual OS synchronization object */
+        acpi_mutex os_mutex;    /* Actual OS synchronization object */
         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
         struct acpi_namespace_node *node;       /* Containing namespace node */
@@ -166,8 +166,8 @@ struct acpi_object_region {
 struct acpi_object_method {
         ACPI_OBJECT_COMMON_HEADER u8 method_flags;
         u8 param_count;
-        u8 concurrency;
-        void *semaphore;
+        u8 sync_level;
+        union acpi_operand_object *mutex;
         u8 *aml_start;
         ACPI_INTERNAL_METHOD implementation;
         u32 aml_length;