io_uring: reuse io_should_terminate_tw() for cmds

io_uring_cmd_work() rolled a hard coded version of
io_should_terminate_tw() to avoid conflicts, but now it's time to
converge them.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8a88dd6e4ed8e6c00c6552af0c20c9de02e458de.1736955455.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: isilence

io_uring/uring_cmd.c

@@ -105,7 +105,7 @@ static void io_uring_cmd_work(struct io_kiocb *req, struct io_tw_state *ts)
 	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
 	unsigned int flags = IO_URING_F_COMPLETE_DEFER;
 
-	if (current->flags & (PF_EXITING | PF_KTHREAD))
+	if (io_should_terminate_tw())
 		flags |= IO_URING_F_TASK_DEAD;
 
 	/* task_work executor checks the deffered list completion */