[PATCH 3/4] acpi: add lockdep magic

Daniel Walker
2008-08-26T19:01:53Z

Add lockdep integration for the ACPI mutex usage.

Cc: linux-acpi@vger.kernel.org
Signed-off-by: Daniel Walker <dwalker@mvista.com>
---
drivers/acpi/dispatcher/dsmethod.c | 4 ++++
drivers/acpi/executer/excreate.c | 4 ++++
drivers/acpi/namespace/nsaccess.c | 5 +++++
drivers/acpi/utilities/utmutex.c | 6 ++++++
4 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 4613b9c..a3cf3d4 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -130,6 +130,7 @@ acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
static acpi_status
acpi_ds_create_method_mutex(union acpi_operand_object *method_desc)
{
+ static struct lock_class_key method_mutex;
union acpi_operand_object *mutex_desc;
acpi_status status;

@@ -149,6 +150,9 @@ acpi_ds_create_method_mutex(union acpi_operand_object *method_desc)
return_ACPI_STATUS(status);
}

+ lockdep_set_class((struct mutex *)&mutex_desc->mutex.os_mutex,
+ &method_mutex);
+
mutex_desc->mutex.sync_level = method_desc->method.sync_level;
method_desc->method.mutex = mutex_desc;
return_ACPI_STATUS(AE_OK);
diff --git a/drivers/acpi/executer/excreate.c b/drivers/acpi/executer/excreate.c
index ad09696..044a780 100644
--- a/drivers/acpi/executer/excreate.c
+++ b/drivers/acpi/executer/excreate.c
@@ -222,6 +222,7 @@ acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
{
acpi_status status = AE_OK;
union acpi_operand_object *obj_desc;
+ static struct lock_class_key interpreter_class;

ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);

@@ -240,6 +241,9 @@ acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
goto cleanup;
}

+ lockdep_set_class((struct mutex *)obj_desc->mutex.os_mutex,
+ &interpreter_class);
+
/* Init object and attach to NS node */

obj_desc->mutex.sync_level =
diff --git a/drivers/acpi/namespace/nsaccess.c b/drivers/acpi/namespace/nsaccess.c
index c39a7f6..293c0ba 100644
--- a/drivers/acpi/namespace/nsaccess.c
+++ b/drivers/acpi/namespace/nsaccess.c
@@ -64,6 +64,7 @@ ACPI_MODULE_NAME("nsaccess")
******************************************************************************/
acpi_status acpi_ns_root_initialize(void)
{
+ static struct lock_class_key ns_root_mutex;
acpi_status status;
const struct acpi_predefined_names *init_val = NULL;
struct acpi_namespace_node *new_node;
@@ -205,6 +206,10 @@ acpi_status acpi_ns_root_initialize(void)
goto unlock_and_exit;
}

+ lockdep_set_class((struct mutex *)
+ obj_desc->mutex.os_mutex,
+ &ns_root_mutex);
+
/* Special case for ACPI Global Lock */

if (ACPI_STRCMP(init_val->name, "_GL_") == 0) {
diff --git a/drivers/acpi/utilities/utmutex.c b/drivers/acpi/utilities/utmutex.c
index 7331dde..3f7f16c 100644
--- a/drivers/acpi/utilities/utmutex.c
+++ b/drivers/acpi/utilities/utmutex.c
@@ -134,6 +134,7 @@ void acpi_ut_mutex_terminate(void)

static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id)
{
+ static struct lock_class_key utility_class_keys[ACPI_MAX_MUTEX];
acpi_status status = AE_OK;

ACPI_FUNCTION_TRACE_U32(ut_create_mutex, mutex_id);
@@ -145,6 +146,11 @@ static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id)
if (!acpi_gbl_mutex_info[mutex_id].mutex) {
status =
acpi_os_create_mutex(&acpi_gbl_mutex_info[mutex_id].mutex);
+
+ lockdep_set_class(
+ (struct mutex *)acpi_gbl_mutex_info[mutex_id].mutex,
+ &utility_class_keys[mutex_id]);
+
acpi_gbl_mutex_info[mutex_id].thread_id =
ACPI_MUTEX_NOT_ACQUIRED;
acpi_gbl_mutex_info[mutex_id].use_count = 0;
--
1.5.5.1.32.gba7d2