ACPICA: Add "const" to some functions that return fixed strings

ACPICA commit 28645f8a113f346c8db103a4f7565fcba88c746f

Most of the "get_name" - style functions can return "const char *"
with no ill side-effects. Original linux patch from
LABBE Corentin <clabbe.montjoie@gmail.com> and backported to
ACPICA.

Link: https://github.com/acpica/acpica/commit/28645f8a
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 13 insertions, 16 deletions

diff --git a/drivers/acpi/acpica/utdecode.c b/drivers/acpi/acpica/utdecode.c
index ecaaaff..7e14400 100644
--- a/drivers/acpi/acpica/utdecode.c
+++ b/drivers/acpi/acpica/utdecode.c
@@ -114,7 +114,7 @@ const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = {
 	"PCC"			/* 0x0A */
 };
 
-char *acpi_ut_get_region_name(u8 space_id)
+const char *acpi_ut_get_region_name(u8 space_id)
 {
 
 	if (space_id >= ACPI_USER_REGION_BEGIN) {
@@ -127,7 +127,7 @@ char *acpi_ut_get_region_name(u8 space_id)
 		return ("InvalidSpaceId");
 	}
 
-	return (ACPI_CAST_PTR(char, acpi_gbl_region_types[space_id]));
+	return (acpi_gbl_region_types[space_id]);
 }
 
 /*******************************************************************************
@@ -152,14 +152,14 @@ static const char *acpi_gbl_event_types[ACPI_NUM_FIXED_EVENTS] = {
 	"RealTimeClock",
 };
 
-char *acpi_ut_get_event_name(u32 event_id)
+const char *acpi_ut_get_event_name(u32 event_id)
 {
 
 	if (event_id > ACPI_EVENT_MAX) {
 		return ("InvalidEventID");
 	}
 
-	return (ACPI_CAST_PTR(char, acpi_gbl_event_types[event_id]));
+	return (acpi_gbl_event_types[event_id]);
 }
 
 /*******************************************************************************
@@ -220,17 +220,17 @@ static const char *acpi_gbl_ns_type_names[] = {
 	/* 30 */ "Invalid"
 };
 
-char *acpi_ut_get_type_name(acpi_object_type type)
+const char *acpi_ut_get_type_name(acpi_object_type type)
 {
 
 	if (type > ACPI_TYPE_INVALID) {
-		return (ACPI_CAST_PTR(char, acpi_gbl_bad_type));
+		return (acpi_gbl_bad_type);
 	}
 
-	return (ACPI_CAST_PTR(char, acpi_gbl_ns_type_names[type]));
+	return (acpi_gbl_ns_type_names[type]);
 }
 
-char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
+const char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
 {
 	ACPI_FUNCTION_TRACE(ut_get_object_type_name);
 
@@ -267,7 +267,7 @@ char *acpi_ut_get_object_type_name(union acpi_operand_object *obj_desc)
  *
  ******************************************************************************/
 
-char *acpi_ut_get_node_name(void *object)
+const char *acpi_ut_get_node_name(void *object)
 {
 	struct acpi_namespace_node *node = (struct acpi_namespace_node *)object;
 
@@ -333,7 +333,7 @@ static const char *acpi_gbl_desc_type_names[] = {
 	/* 15 */ "Node"
 };
 
-char *acpi_ut_get_descriptor_name(void *object)
+const char *acpi_ut_get_descriptor_name(void *object)
 {
 
 	if (!object) {
@@ -344,10 +344,7 @@ char *acpi_ut_get_descriptor_name(void *object)
 		return ("Not a Descriptor");
 	}
 
-	return (ACPI_CAST_PTR(char,
-			      acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE
-						       (object)]));
-
+	return (acpi_gbl_desc_type_names[ACPI_GET_DESCRIPTOR_TYPE(object)]);
 }
 
 /*******************************************************************************
@@ -415,7 +412,7 @@ const char *acpi_ut_get_reference_name(union acpi_operand_object *object)
 
 /* Names for internal mutex objects, used for debug output */
 
-static char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
+static const char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
 	"ACPI_MTX_Interpreter",
 	"ACPI_MTX_Namespace",
 	"ACPI_MTX_Tables",
@@ -424,7 +421,7 @@ static char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
 	"ACPI_MTX_Memory",
 };
 
-char *acpi_ut_get_mutex_name(u32 mutex_id)
+const char *acpi_ut_get_mutex_name(u32 mutex_id)
 {
 
 	if (mutex_id > ACPI_MAX_MUTEX) {