drivers/gpio/gpiolib.c

94 				struct lock_class_key *request_key);
877 			       struct lock_class_key *request_key)
1047 	ret = gpiochip_add_irqchip(gc, lock_key, request_key);
1489 	irq_set_lockdep_class(irq, gc->irq.lock_key, gc->irq.request_key);
1679 	irq_set_lockdep_class(irq, gc->irq.lock_key, gc->irq.request_key);
1897  * @request_key: lockdep class for IRQ request
1901 				struct lock_class_key *request_key)
1931 	gc->irq.request_key = request_key;
2045 				       struct lock_class_key *request_key)