io_import_reg_vec
ret = io_import_reg_vec(ITER_SOURCE, &kmsg->msg.msg_iter,
int io_import_reg_vec(int ddir, struct iov_iter *iter,
ret = io_import_reg_vec(ddir, &io->iter, req, &io->vec,
return io_import_reg_vec(ddir, iter, req, &ac->vec, uvec_segs,