iterate_fd
int n = iterate_fd(current->files, *fd, match_context, NULL);
i = iterate_fd(p->files, 0, this_tty, tty);
EXPORT_SYMBOL(iterate_fd);
int iterate_fd(struct files_struct *, unsigned,
fd = iterate_fd(p->files, fd, update_classid_sock, &ctx);
iterate_fd(p->files, 0, update_netprio, v);
n = iterate_fd(files, 0, match_file, &cl);
} while ((n = iterate_fd(files, n, match_file, &cl)) != 0);
n = iterate_fd(files, 0, match_file, cred);
} while ((n = iterate_fd(files, n, match_file, cred)) != 0);