// SPDX-License-Identifier: GPL-2.0 int io_uring_sync_msg_ring(struct io_uring_sqe *sqe);int io_msg_ring_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);int io_msg_ring(struct io_kiocb *req, unsigned int issue_flags);void io_msg_ring_cleanup(struct io_kiocb *req);void io_msg_cache_free(const void *entry);