scm_stat
struct scm_stat scm_stat;
memset(&u->scm_stat, 0, sizeof(struct scm_stat));
atomic_add(fp->count, &u->scm_stat.nr_fds);
atomic_sub(fp->count, &u->scm_stat.nr_fds);
nr_fds += atomic_read(&u->scm_stat.nr_fds);
nr_fds = atomic_read(&u->scm_stat.nr_fds);
receiver->scm_stat.nr_unix_fds += fpl->count_unix;
receiver->scm_stat.nr_unix_fds -= fpl->count_unix;
if (!receiver->scm_stat.nr_unix_fds) {