To avoid false lockdep warnings, give each client lock a different lock class, passed from the initialization site by macro.
Signed-off-by: Mikko Perttunen mperttunen@nvidia.com --- drivers/gpu/host1x/bus.c | 7 ++++--- include/linux/host1x.h | 9 ++++++++- 2 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index e201f62d62c0..4101f64bd545 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -714,13 +714,14 @@ EXPORT_SYMBOL(host1x_driver_unregister); * device and call host1x_device_init(), which will in turn call each client's * &host1x_client_ops.init implementation. */ -int host1x_client_register(struct host1x_client *client) +int __host1x_client_register(struct host1x_client *client, + struct lock_class_key *key) { struct host1x *host1x; int err;
INIT_LIST_HEAD(&client->list); - mutex_init(&client->lock); + __mutex_init(&client->lock, "host1x client lock", key); client->usecount = 0;
mutex_lock(&devices_lock); @@ -741,7 +742,7 @@ int host1x_client_register(struct host1x_client *client)
return 0; } -EXPORT_SYMBOL(host1x_client_register); +EXPORT_SYMBOL(__host1x_client_register);
/** * host1x_client_unregister() - unregister a host1x client diff --git a/include/linux/host1x.h b/include/linux/host1x.h index 20c885d0bddc..f711fc0154f4 100644 --- a/include/linux/host1x.h +++ b/include/linux/host1x.h @@ -320,7 +320,14 @@ static inline struct host1x_device *to_host1x_device(struct device *dev) int host1x_device_init(struct host1x_device *device); int host1x_device_exit(struct host1x_device *device);
-int host1x_client_register(struct host1x_client *client); +int __host1x_client_register(struct host1x_client *client, + struct lock_class_key *key); +#define host1x_client_register(class) \ + ({ \ + static struct lock_class_key __key; \ + __host1x_client_register(class, &__key); \ + }) + int host1x_client_unregister(struct host1x_client *client);
int host1x_client_suspend(struct host1x_client *client);