io_uring: remove __io_req_task_work_add

this is no longer needed as there is only one caller
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220622134028.2013417-3-dylany@fb.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -1040,9 +1040,9 @@ void tctx_task_work(struct callback_head *cb)
 		io_uring_drop_tctx_refs(current);
 }
 
-static void __io_req_task_work_add(struct io_kiocb *req,
-				   struct io_uring_task *tctx)
+void io_req_task_work_add(struct io_kiocb *req)
 {
+	struct io_uring_task *tctx = req->task->io_uring;
 	struct io_ring_ctx *ctx = req->ctx;
 	struct io_wq_work_node *node;
 	unsigned long flags;
@@ -1080,13 +1080,6 @@ static void __io_req_task_work_add(struct io_kiocb *req,
 	}
 }
 
-void io_req_task_work_add(struct io_kiocb *req)
-{
-	struct io_uring_task *tctx = req->task->io_uring;
-
-	__io_req_task_work_add(req, tctx);
-}
-
 static void io_req_tw_post(struct io_kiocb *req, bool *locked)
 {
 	io_req_complete_post(req);