io_uring: remove extra io_wq_current_is_worker()

mainline inclusion
from mainline-5.6-rc1
commit 2550878f
category: feature
bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=27
CVE: NA
---------------------------

io_wq workers use io_issue_sqe() to forward sqes and never
io_queue_sqe(). Remove extra check for io_wq_current_is_worker()
Signed-off-by: NPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>
Signed-off-by: Nyangerkun <yangerkun@huawei.com>
Reviewed-by: Nzhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: NCheng Jian <cj.chengjian@huawei.com>

fs/io_uring.c

@@ -4368,8 +4368,7 @@ static void io_queue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 			req_set_fail_links(req);
 			io_double_put_req(req);
 		}
-	} else if ((req->flags & REQ_F_FORCE_ASYNC) &&
-		   !io_wq_current_is_worker()) {
+	} else if (req->flags & REQ_F_FORCE_ASYNC) {
 		/*
 		 * Never try inline submit of IOSQE_ASYNC is set, go straight
 		 * to async execution.