[PATCH 09/10] io_uring: use u64_to_user_ptr() consistently

[Jens Axboe <axboe@xxxxxxxxx>]

We use it in some spots, but not consistently. Convert the rest over,
makes it easier to read as well.

No functional changes in this patch.

Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
 fs/io_uring.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 927f28112f0e..6f169b5a6494 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2211,7 +2211,7 @@ static int io_sendmsg_prep(struct io_kiocb *req, struct io_async_ctx *io)
 	unsigned flags;
 
 	flags = READ_ONCE(sqe->msg_flags);
-	msg = (struct user_msghdr __user *)(unsigned long) READ_ONCE(sqe->addr);
+	msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
 	io->msg.iov = io->msg.fast_iov;
 	return sendmsg_copy_msghdr(&io->msg.msg, msg, flags, &io->msg.iov);
 #else
@@ -2290,7 +2290,7 @@ static int io_recvmsg_prep(struct io_kiocb *req, struct io_async_ctx *io)
 	unsigned flags;
 
 	flags = READ_ONCE(sqe->msg_flags);
-	msg = (struct user_msghdr __user *)(unsigned long) READ_ONCE(sqe->addr);
+	msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
 	io->msg.iov = io->msg.fast_iov;
 	return recvmsg_copy_msghdr(&io->msg.msg, msg, flags, &io->msg.uaddr,
 					&io->msg.iov);
@@ -2324,8 +2324,7 @@ static int io_recvmsg(struct io_kiocb *req, struct io_kiocb **nxt,
 		else if (force_nonblock)
 			flags |= MSG_DONTWAIT;
 
-		msg = (struct user_msghdr __user *) (unsigned long)
-			READ_ONCE(sqe->addr);
+		msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
 		if (req->io) {
 			kmsg = &req->io->msg.msg;
 			kmsg->msg_name = &addr;
@@ -2380,8 +2379,8 @@ static int io_accept(struct io_kiocb *req, struct io_kiocb **nxt,
 	if (sqe->ioprio || sqe->len || sqe->buf_index)
 		return -EINVAL;
 
-	addr = (struct sockaddr __user *) (unsigned long) READ_ONCE(sqe->addr);
-	addr_len = (int __user *) (unsigned long) READ_ONCE(sqe->addr2);
+	addr = u64_to_user_ptr(READ_ONCE(sqe->addr));
+	addr_len = u64_to_user_ptr(READ_ONCE(sqe->addr2));
 	flags = READ_ONCE(sqe->accept_flags);
 	file_flags = force_nonblock ? O_NONBLOCK : 0;
 
@@ -2409,7 +2408,7 @@ static int io_connect_prep(struct io_kiocb *req, struct io_async_ctx *io)
 	struct sockaddr __user *addr;
 	int addr_len;
 
-	addr = (struct sockaddr __user *) (unsigned long) READ_ONCE(sqe->addr);
+	addr = u64_to_user_ptr(READ_ONCE(sqe->addr));
 	addr_len = READ_ONCE(sqe->addr2);
 	return move_addr_to_kernel(addr, addr_len, &io->connect.address);
 #else
@@ -4654,7 +4653,7 @@ static int io_copy_iov(struct io_ring_ctx *ctx, struct iovec *dst,
 		if (copy_from_user(&ciov, &ciovs[index], sizeof(ciov)))
 			return -EFAULT;
 
-		dst->iov_base = (void __user *) (unsigned long) ciov.iov_base;
+		dst->iov_base = u64_to_user_ptr((u64)ciov.iov_base);
 		dst->iov_len = ciov.iov_len;
 		return 0;
 	}
-- 
2.24.1