ACPICA: Remove unused ACPI_FREE_BUFFER macro. No functional change.

This macro is no longer used by ACPICA and it is not public.
Also update comments related to the use of ACPI_ALLOCATE_BUFFER and
the use of acpi_os_free (kfree is equivalent and prefered in the
kernel) to free the buffer.

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>

1 files changed, 2 insertions, 10 deletions

diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 809b1a0fee7f..68a3ada689c9 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -928,8 +928,8 @@ struct acpi_object_list {
  * Miscellaneous common Data Structures used by the interfaces
  */
 #define ACPI_NO_BUFFER              0
-#define ACPI_ALLOCATE_BUFFER        (acpi_size) (-1)
-#define ACPI_ALLOCATE_LOCAL_BUFFER  (acpi_size) (-2)
+#define ACPI_ALLOCATE_BUFFER        (acpi_size) (-1)    /* Let ACPICA allocate buffer */
+#define ACPI_ALLOCATE_LOCAL_BUFFER  (acpi_size) (-2)    /* For internal use only (enables tracking) */
 
 struct acpi_buffer {
         acpi_size length;       /* Length in bytes of the buffer */
@@ -937,14 +937,6 @@ struct acpi_buffer {
 };
 
 /*
- * Free a buffer created in an struct acpi_buffer via ACPI_ALLOCATE_BUFFER.
- * Note: We use acpi_os_free here because acpi_os_allocate was used to allocate
- * the buffer. This purposefully bypasses the internal allocation tracking
- * mechanism (if it is enabled).
- */
-#define ACPI_FREE_BUFFER(b)         acpi_os_free((b).pointer)
-
-/*
  * name_type for acpi_get_name
  */
 #define ACPI_FULL_PATHNAME              0