ACPICA: Fix miscellaneous warnings under gcc 4+

Some possible warnings with gcc 4+, especially with extended warnings
enabled

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com
Signed-off-by: Len Brown <len.brown@intel.com>

3 files changed, 11 insertions, 6 deletions

diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c
index dab3f48f0b42..02e6caad4a76 100644
--- a/drivers/acpi/acpica/dsobject.c
+++ b/drivers/acpi/acpica/dsobject.c
@@ -734,7 +734,8 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 
                         /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
 
-                        obj_desc->reference.value = opcode - AML_LOCAL_OP;
+                        obj_desc->reference.value =
+                            ((u32)opcode) - AML_LOCAL_OP;
                         obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
@@ -754,7 +755,7 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
 
                         /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
 
-                        obj_desc->reference.value = opcode - AML_ARG_OP;
+                        obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP;
                         obj_desc->reference.class = ACPI_REFCLASS_ARG;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
diff --git a/drivers/acpi/acpica/dswstate.c b/drivers/acpi/acpica/dswstate.c
index 40f92bf7dce5..e46c821cf572 100644
--- a/drivers/acpi/acpica/dswstate.c
+++ b/drivers/acpi/acpica/dswstate.c
@@ -102,7 +102,7 @@ acpi_ds_result_pop(union acpi_operand_object **object,
         /* Return object of the top element and clean that top element result stack */
 
         walk_state->result_count--;
-        index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
+        index = (u32)walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
 
         *object = state->results.obj_desc[index];
         if (!*object) {
@@ -186,7 +186,7 @@ acpi_ds_result_push(union acpi_operand_object * object,
 
         /* Assign the address of object to the top free element of result stack */
 
-        index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
+        index = (u32)walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
         state->results.obj_desc[index] = object;
         walk_state->result_count++;
 
diff --git a/drivers/acpi/acpica/rsxface.c b/drivers/acpi/acpica/rsxface.c
index 69a2aa5b5d83..395212bcd19b 100644
--- a/drivers/acpi/acpica/rsxface.c
+++ b/drivers/acpi/acpica/rsxface.c
@@ -338,13 +338,17 @@ acpi_resource_to_address64(struct acpi_resource *resource,
         switch (resource->type) {
         case ACPI_RESOURCE_TYPE_ADDRESS16:
 
-                address16 = (struct acpi_resource_address16 *)&resource->data;
+                address16 =
+                    ACPI_CAST_PTR(struct acpi_resource_address16,
+                                  &resource->data);
                 ACPI_COPY_ADDRESS(out, address16);
                 break;
 
         case ACPI_RESOURCE_TYPE_ADDRESS32:
 
-                address32 = (struct acpi_resource_address32 *)&resource->data;
+                address32 =
+                    ACPI_CAST_PTR(struct acpi_resource_address32,
+                                  &resource->data);
                 ACPI_COPY_ADDRESS(out, address32);
                 break;