user_event_file_info
struct user_event_file_info *info = file->private_data;
struct user_event_file_info *info;
static int user_events_ref_add(struct user_event_file_info *info,
static long user_events_ioctl_reg(struct user_event_file_info *info,
static long user_events_ioctl_del(struct user_event_file_info *info,
struct user_event_file_info *info = file->private_data;
struct user_event_file_info *info = file->private_data;