[PATCH 5.19 1/3] Revert "io_uring: support CQE32 for nop operation"

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

This reverts commit 2bb04df7c2af9dad5d28771c723bc39b01cf7df4.

CQE32 nops were used for debugging and benchmarking but it doesn't
target any real use case. Revert it, we can return it back if someone
finds a good way to use it.

Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 fs/io_uring.c | 21 +--------------------
 1 file changed, 1 insertion(+), 20 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index ca6170a66e62..bf556f77d4ab 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -784,12 +784,6 @@ struct io_msg {
 	u32 len;
 };
 
-struct io_nop {
-	struct file			*file;
-	u64				extra1;
-	u64				extra2;
-};
-
 struct io_async_connect {
 	struct sockaddr_storage		address;
 };
@@ -994,7 +988,6 @@ struct io_kiocb {
 		struct io_msg		msg;
 		struct io_xattr		xattr;
 		struct io_socket	sock;
-		struct io_nop		nop;
 		struct io_uring_cmd	uring_cmd;
 	};
 
@@ -5268,14 +5261,6 @@ static int io_splice(struct io_kiocb *req, unsigned int issue_flags)
 
 static int io_nop_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
-	/*
-	 * If the ring is setup with CQE32, relay back addr/addr
-	 */
-	if (req->ctx->flags & IORING_SETUP_CQE32) {
-		req->nop.extra1 = READ_ONCE(sqe->addr);
-		req->nop.extra2 = READ_ONCE(sqe->addr2);
-	}
-
 	return 0;
 }
 
@@ -5296,11 +5281,7 @@ static int io_nop(struct io_kiocb *req, unsigned int issue_flags)
 	}
 
 	cflags = io_put_kbuf(req, issue_flags);
-	if (!(req->ctx->flags & IORING_SETUP_CQE32))
-		__io_req_complete(req, issue_flags, 0, cflags);
-	else
-		__io_req_complete32(req, issue_flags, 0, cflags,
-				    req->nop.extra1, req->nop.extra2);
+	__io_req_complete(req, issue_flags, 0, cflags);
 	return 0;
 }
 
-- 
2.36.1