io_uring: make timeout prep handlers consistent with other prep handlers

All other opcodes take a {req, sqe} set for prep handling, split out
a timeout prep handler so that timeout and linked timeouts can use
the same one.
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -7698,7 +7698,8 @@ static int io_timeout_remove(struct io_kiocb *req, unsigned int issue_flags)
 	return 0;
 }
 
-static int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe,
+static int __io_timeout_prep(struct io_kiocb *req,
+			     const struct io_uring_sqe *sqe,
 			     bool is_timeout_link)
 {
 	struct io_timeout_data *data;
@@ -7754,6 +7755,18 @@ static int io_timeout_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe,
 	return 0;
 }
 
+static int io_timeout_prep(struct io_kiocb *req,
+			   const struct io_uring_sqe *sqe)
+{
+	return __io_timeout_prep(req, sqe, false);
+}
+
+static int io_link_timeout_prep(struct io_kiocb *req,
+				const struct io_uring_sqe *sqe)
+{
+	return __io_timeout_prep(req, sqe, true);
+}
+
 static int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_ring_ctx *ctx = req->ctx;
@@ -8039,13 +8052,13 @@ static int io_req_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	case IORING_OP_CONNECT:
 		return io_connect_prep(req, sqe);
 	case IORING_OP_TIMEOUT:
-		return io_timeout_prep(req, sqe, false);
+		return io_timeout_prep(req, sqe);
 	case IORING_OP_TIMEOUT_REMOVE:
 		return io_timeout_remove_prep(req, sqe);
 	case IORING_OP_ASYNC_CANCEL:
 		return io_async_cancel_prep(req, sqe);
 	case IORING_OP_LINK_TIMEOUT:
-		return io_timeout_prep(req, sqe, true);
+		return io_link_timeout_prep(req, sqe);
 	case IORING_OP_ACCEPT:
 		return io_accept_prep(req, sqe);
 	case IORING_OP_FALLOCATE: