Re: [next]: fs/io_uring.c:6171:10: error: implicit declaration of function 'io_sendmsg_prep_async'; did you mean 'io_req_prep_async'?

From: Jens Axboe
Date: Fri Feb 19 2021 - 11:39:00 EST


On 2/19/21 9:08 AM, Naresh Kamboju wrote:
> Linux next tag 20210219 arm and mips builds failed due to below error.
>
> Following build configs failed
> arm (s3c6400_defconfig) with gcc-8
> arm (s3c6400_defconfig) with gcc-9
> arm (s3c6400_defconfig) with gcc-10
>
> mips (e55_defconfig) with gcc-8
> mips (e55_defconfig) with gcc-9
> mips (e55_defconfig) with gcc-10
>
> fs/io_uring.c:6171:10: error: implicit declaration of function
> 'io_sendmsg_prep_async'; did you mean 'io_req_prep_async'?
> [-Werror=implicit-function-declaration]
> return io_sendmsg_prep_async(req);
> ^~~~~~~~~~~~~~~~~~~~~
> io_req_prep_async
>
> Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>

This should fix it, cleaning it up a bit at the same time.


commit b1c892df32ebf6f30c995e23dcafeae2392ad1bc
Author: Jens Axboe <axboe@xxxxxxxxx>
Date: Fri Feb 19 09:35:19 2021 -0700

io_uring: make the !CONFIG_NET helpers a bit more robust

With the prep and prep async split, we now have potentially 3 helpers
that need to be defined for !CONFIG_NET. Add some helpers to do just
that.

Fixes the following compile error on !CONFIG_NET:

fs/io_uring.c:6171:10: error: implicit declaration of function
'io_sendmsg_prep_async'; did you mean 'io_req_prep_async'?
[-Werror=implicit-function-declaration]
return io_sendmsg_prep_async(req);
^~~~~~~~~~~~~~~~~~~~~
io_req_prep_async

Fixes: 93642ef88434 ("io_uring: split sqe-prep and async setup")
Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b7bae301744b..c9a5c498dc3b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5127,56 +5127,32 @@ static int io_connect(struct io_kiocb *req, unsigned int issue_flags)
return 0;
}
#else /* !CONFIG_NET */
-static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_send(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_recvmsg_prep(struct io_kiocb *req,
- const struct io_uring_sqe *sqe)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_recv(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_accept(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
-{
- return -EOPNOTSUPP;
-}
-
-static int io_connect(struct io_kiocb *req, unsigned int issue_flags)
-{
- return -EOPNOTSUPP;
-}
+#define IO_NETOP_FN(op) \
+static int io_##op(struct io_kiocb *req, unsigned int issue_flags) \
+{ \
+ return -EOPNOTSUPP; \
+}
+
+#define IO_NETOP_PREP(op) \
+IO_NETOP_FN(op) \
+static int io_##op##_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) \
+{ \
+ return -EOPNOTSUPP; \
+} \
+
+#define IO_NETOP_PREP_ASYNC(op) \
+IO_NETOP_PREP(op) \
+static int io_##op##_prep_async(struct io_kiocb *req) \
+{ \
+ return -EOPNOTSUPP; \
+}
+
+IO_NETOP_PREP_ASYNC(sendmsg);
+IO_NETOP_PREP_ASYNC(recvmsg);
+IO_NETOP_PREP_ASYNC(connect);
+IO_NETOP_PREP(accept);
+IO_NETOP_FN(send);
+IO_NETOP_FN(recv);
#endif /* CONFIG_NET */

struct io_poll_table {

--
Jens Axboe