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ACPICA: Debugger: refactor to fix unused variable warning

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When building ACPICA in the Linux kernel with Clang with ACPI_DISASSEMBLER
not defined, we get a the following warning on variable display_op:

warning: variable 'display_op' set but not used [-Wunused-but-set-variable]

Fix this by refactoring display_op and parent_op code in a separate function.

Suggested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Erik Schmauss 2018-11-05 09:43:51 -08:00 committed by Rafael J. Wysocki
parent 651022382c
commit c647eb98b0
1 changed files with 74 additions and 44 deletions
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118
drivers/acpi/acpica/dbxface.c
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@ -24,6 +24,13 @@ acpi_db_start_command(struct acpi_walk_state *walk_state,
void acpi_db_method_end(struct acpi_walk_state *walk_state);
#endif
#ifdef ACPI_DISASSEMBLER
static union acpi_parse_object *acpi_db_get_display_op(struct acpi_walk_state
*walk_state,
union acpi_parse_object
*op);
#endif
/*******************************************************************************
*
* FUNCTION: acpi_db_start_command
@ -113,6 +120,70 @@ void acpi_db_signal_break_point(struct acpi_walk_state *walk_state)
acpi_os_printf("**break** Executed AML BreakPoint opcode\n");
}
#ifdef ACPI_DISASSEMBLER
/*******************************************************************************
*
* FUNCTION: acpi_db_get_display_op
*
* PARAMETERS: walk_state - Current walk
* op - Current executing op (from aml interpreter)
*
* RETURN: Opcode to display
*
* DESCRIPTION: Find the opcode to display during single stepping
*
******************************************************************************/
static union acpi_parse_object *acpi_db_get_display_op(struct acpi_walk_state
*walk_state,
union acpi_parse_object
*op)
{
union acpi_parse_object *display_op;
union acpi_parse_object *parent_op;
display_op = op;
parent_op = op->common.parent;
if (parent_op) {
if ((walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_PREDICATE_EXECUTING)) {
/*
* We are executing the predicate of an IF or WHILE statement
* Search upwards for the containing IF or WHILE so that the
* entire predicate can be displayed.
*/
while (parent_op) {
if ((parent_op->common.aml_opcode == AML_IF_OP)
|| (parent_op->common.aml_opcode ==
AML_WHILE_OP)) {
display_op = parent_op;
break;
}
parent_op = parent_op->common.parent;
}
} else {
while (parent_op) {
if ((parent_op->common.aml_opcode == AML_IF_OP)
|| (parent_op->common.aml_opcode ==
AML_ELSE_OP)
|| (parent_op->common.aml_opcode ==
AML_SCOPE_OP)
|| (parent_op->common.aml_opcode ==
AML_METHOD_OP)
|| (parent_op->common.aml_opcode ==
AML_WHILE_OP)) {
break;
}
display_op = parent_op;
parent_op = parent_op->common.parent;
}
}
}
return display_op;
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_db_single_step
@ -134,8 +205,6 @@ acpi_db_single_step(struct acpi_walk_state *walk_state,
union acpi_parse_object *next;
acpi_status status = AE_OK;
u32 original_debug_level;
union acpi_parse_object *display_op;
union acpi_parse_object *parent_op;
u32 aml_offset;
ACPI_FUNCTION_ENTRY();
@ -222,51 +291,12 @@ acpi_db_single_step(struct acpi_walk_state *walk_state,
next = op->common.next;
op->common.next = NULL;
display_op = op;
parent_op = op->common.parent;
if (parent_op) {
if ((walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_PREDICATE_EXECUTING)) {
/*
* We are executing the predicate of an IF or WHILE statement
* Search upwards for the containing IF or WHILE so that the
* entire predicate can be displayed.
*/
while (parent_op) {
if ((parent_op->common.aml_opcode ==
AML_IF_OP)
|| (parent_op->common.aml_opcode ==
AML_WHILE_OP)) {
display_op = parent_op;
break;
}
parent_op = parent_op->common.parent;
}
} else {
while (parent_op) {
if ((parent_op->common.aml_opcode ==
AML_IF_OP)
|| (parent_op->common.aml_opcode ==
AML_ELSE_OP)
|| (parent_op->common.aml_opcode ==
AML_SCOPE_OP)
|| (parent_op->common.aml_opcode ==
AML_METHOD_OP)
|| (parent_op->common.aml_opcode ==
AML_WHILE_OP)) {
break;
}
display_op = parent_op;
parent_op = parent_op->common.parent;
}
}
}
/* Now we can disassemble and display it */
#ifdef ACPI_DISASSEMBLER
acpi_dm_disassemble(walk_state, display_op, ACPI_UINT32_MAX);
acpi_dm_disassemble(walk_state,
acpi_db_get_display_op(walk_state, op),
ACPI_UINT32_MAX);
#else
/*
* The AML Disassembler is not configured - at least we can