io_uring/net: io_async_msghdr caches for sendzc

We already keep io_async_msghdr caches for normal send/recv requests,
use them also for zerocopy send.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/42fa615b6e0be25f47a685c35d7b5e4f1b03d348.1662639236.git.asml.silence@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/net.c

@@ -196,10 +196,9 @@ int io_sendzc_prep_async(struct io_kiocb *req)
 
 	if (!zc->addr || req_has_async_data(req))
 		return 0;
-	if (io_alloc_async_data(req))
+	io = io_msg_alloc_async_prep(req);
+	if (!io)
 		return -ENOMEM;
-
-	io = req->async_data;
 	ret = move_addr_to_kernel(zc->addr, zc->addr_len, &io->addr);
 	return ret;
 }
@@ -212,9 +211,9 @@ static int io_setup_async_addr(struct io_kiocb *req,
 
 	if (!addr || req_has_async_data(req))
 		return -EAGAIN;
-	if (io_alloc_async_data(req))
+	io = io_msg_alloc_async(req, issue_flags);
+	if (!io)
 		return -ENOMEM;
-	io = req->async_data;
 	memcpy(&io->addr, addr, sizeof(io->addr));
 	return -EAGAIN;
 }