io_uring: refactor io_req_task_complete()

Clean up io_req_task_complete() and deduplicate io_put_kbuf() calls.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/ae3148ac7eb5cce3e06895cde306e9e959d6f6ae.1655371007.git.asml.silence@gmail.comReviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -1306,15 +1306,19 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
 
 	return ret;
 }
-inline void io_req_task_complete(struct io_kiocb *req, bool *locked)
+
+void io_req_task_complete(struct io_kiocb *req, bool *locked)
 {
-	if (*locked) {
-		req->cqe.flags |= io_put_kbuf(req, 0);
+	if (req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING)) {
+		unsigned issue_flags = *locked ? 0 : IO_URING_F_UNLOCKED;
+
+		req->cqe.flags |= io_put_kbuf(req, issue_flags);
+	}
+
+	if (*locked)
 		io_req_add_compl_list(req);
-	} else {
-		req->cqe.flags |= io_put_kbuf(req, IO_URING_F_UNLOCKED);
+	else
 		io_req_complete_post(req);
-	}
 }
 
 /*