#ifdef CONFIG_LOCKDEP
#define v4l2_ctrl_handler_init(hdl, nr_of_controls_hint) \
( \
({ \
static struct lock_class_key _key; \
v4l2_ctrl_handler_init_class(hdl, nr_of_controls_hint, \
&_key, \
KBUILD_BASENAME ":" \
__stringify(__LINE__) ":" \
"(" #hdl ")->_lock"); \
}) \
)
#else
#define v4l2_ctrl_handler_init(hdl, nr_of_controls_hint) \
v4l2_ctrl_handler_init_class(hdl, nr_of_controls_hint, NULL, NULL)
#endif