reader_lock_key 492 kernel/trace/ring_buffer.c struct lock_class_key *reader_lock_key; reader_lock_key 1301 kernel/trace/ring_buffer.c lockdep_set_class(&cpu_buffer->reader_lock, buffer->reader_lock_key); reader_lock_key 1398 kernel/trace/ring_buffer.c buffer->reader_lock_key = key;